Abstract

We report the experimental generation of polarization entangled photon pairs based on spontaneous four-wave mixing in a silicon waveguide. Using a nano-scale silicon wire waveguide placed in a fiber loop, we obtained 1.5-µm band polarization entanglement with two-photon interference visibilities of >83%.

©2008 Optical Society of America

1. Introduction

Entanglement is an essential resource for quantum information systems such as quantum key distribution (QKD) [1] or quantum computers [2]. To realize quantum information systems over optical fiber networks, it is very important to establish a way to generate entangled photons in the 1.5-µm band. There have been several reports on such 1.5-µm band entangled photon sources, including sources based on spontaneous parametric downconversion (SPDC) in periodically poled lithium niobate (PPLN) waveguides [3, 4, 5], spontaneous four-wave mixing (SFWM) in dispersion shifted fibers (DSF) [6, 7], and SPDC in bulk crystals [8]. Of these, the DSF-based entangled photon source is promising because of its good connectivity to transmission fibers. In addition, the photon timing jitter caused by the “walk off” between a pump pulse and a photon pair is usually negligible in an SFWM-based photon-pair source, because the four photons involved in the nonlinear process have similar frequencies and so the group velocity mismatch is negligible. As a result, it was shown that the photons from two independent DSF-based photon-pair sources exhibited quantum interference [9]. This characteristic makes the entanglement source a promising candidate for a quantum relay, which is a QKD based on entanglement swapping [10, 11].

However, there is a drawback with DSF-based entanglement sources, namely noise photons generated by spontaneous Raman scattering (SpRS) [6, 7, 12]. Although SpRS photons can be significantly reduced by cooling the fiber [13], the use of cooling equipment complicates the entire system and is thus undesirable.

Recently, SFWM in a nano-scale silicon waveguide has been attracting attention as a way of generating correlated photon pairs [14, 15]. Since the Raman spectrum of single crystal silicon is 15.6 THz away from the pump frequency with a width of about 100 GHz, the SpRS photons in silicon are significantly suppressed by setting the signal/idler frequencies away from the Raman peak [16]. We have already reported the first entanglement generation experiment using a silicon waveguide, which was based on time-bin qubits [17]. Although time-bin entanglement is suitable for fiber transmission [18], entangled photons based on polarization qubits are important for many quantum information processing tasks such as quantum teleportation [19], entanglement swapping [20], and entanglement purification [21, 22]. In this paper, we report the generation of polarization entanglement using a silicon wire waveguide. By placing the silicon waveguide in a fiber loop that is similar to the one used in citetakesue1,li2,ful,fan, we have successfully generated polarization entangled photon pairs.

2. Experimental setup

 figure: Fig. 1.

Fig. 1. Experimental setup. PBS: polarization beam splitter, PC: polarization controller.

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Figure 1 shows the experimental setup. A 90-ps pump pulse with a wavelength of 1551.1 nm and with a 100-MHz repetition rate was passed through a polarizer, a polarization controller (PC) and a circulator, and input into a fiber loop. The loop consisted of a polarization beam splitter (PBS), two PCs and a silicon wire waveguide. The polarizer angle and the PC in front of the circulator were adjusted so that the polarization state immediately before the PBS exhibited 45-degree linear polarization. The pump pulse was split into horizontal (H) and vertical (V) polarization components with the PBS, which circulated in the loop in the counter-clockwise (CCW) and clockwise (CW) directions, respectively. At the silicon wire waveguide, the CCW (CW) pump pulse probabilistically created a photon pair state |CCWs|CCWi (|CWs|CWi) through SFWM, where |Xy denotes a state in which there is a photon in the X direction (or a polarization state in the later case) and in mode y (=s, i; s: signal, i: idler). The PCs in the loop were adjusted so that the polarization states of both the CCW andCW pumps were aligned with the same silicon waveguide axis. With this configuration, the state |CCWy (|CWy) generated in the waveguide was converted to |Vy(|Hy), and output from the loop through the PBS input port. As a result, we obtained a maximally entangled state (|Hs|Hi +|Vs|Vi)/√2 at the output port of the circulator by employing a relatively low pump power thus minimizing the probability of the simultaneous generation of both |CCWs|CCWi and |CWs|CWi states. The photons from the circulator were passed through a fiber Bragg grating to suppress the pump, and launched into an arrayed waveguide grating to separate signal and idler photons. The signal and idler wavelengths were 1547.9 and 1554.3 nm, respectively, and both had a 0.2-nm bandwidth. The bandwidth was measured using an optical spectrum analyzer with a wavelength resolution of 0.007 nm. The signal and idler photons were then filtered by bandpass filters to further suppress the pump, and input into polarization compensators to make the Jones matrices of the signal and idler paths the same. The full widths at half maximum of the transmittance spectra of the bandpass filters were both 0.8 nm, and the losses at the peak transmittance points were 1.0 dB (signal) and 1.2 dB (idler). Then, each photon was transmitted through a rotatable polarizer, and detected by an InGaAs/InP avalanche photodiode (APD) operated in a gate Geiger mode at a frequency of 10 MHz. The temporal width of the gate was set at 1.4 ns. The 10-MHz gate signal to the APDs was synchronized with the 100-MHz pump pulses. We used a 100-MHz pump frequency so that we could easily capture a pulse in a gate with a small change in the gate delay time. The quantum efficiencies of the detectors were both 10%, and the dark count rates per gate were 1.4×10-5 (signal) and 3.2×10-5 (idler). The signal and idler channel losses were 15.7 and 12.6 dB, respectively. The detection signals from the idler and signal channels were input into a time interval analyzer as start and stop pulses, respectively, to record coincidence counts.

The silicon wire waveguide was fabricated on an silicon-on-insulator (SOI) wafer with a silicon top layer on a 3 µm SiO2 layer [26]. The waveguide was 460 nm wide, 220 nm thick and 1.09 cm long, and required no temperature control. The waveguide loss was 3.1 dB, and the effective area of the waveguide was calculated to be 0.04 µm2 [27]. Thanks to this small effective area, the estimated nonlinearity coefficient exceeded 105 1/W/km [17]. The waveguide coupled peak pump power to each facet was around 60 mW, and we used it to generate polarization entangled photon pairs with an average photon-pair number per pulse of about 0.05.

3. Result

We fixed the polarizer angle of the signal θs, and measured the single and coincidence count rate while rotating the idler polarizer angle θi. Figures 2 and 3 show the coincidence rate per start pulse and the idler count rate as a function of θi, respectively. Here, the squares and circles denote the rates when θs was set at 0 and 45 degrees, respectively. We observed clear modulation in the coincidence count rates for two non-orthogonal measurements performed for the signal photons, while the idler count rate was almost independent of θi. The slight change in the idler count rate observed in Fig. 2 was possibly caused by the polarization dependent loss of the polarizer for the idler channel. The coincidence rate at the peak of the fringe was 1.8 cps when θs=0. The coincidence at each idler polarizer angle was measured for a period in which 100,000 start pulses were recorded. Since the average idler count rate was ~1,800 as shown in Fig. 3, the measurement time for each point in Fig. 2 was approximately 55 s. 102 coincidence counts were obtained at the peak of the fringe. The visibilities of the fitted curves were 95.9±9.0% for θs=0 and 82.9±7.1% for θs=45 degrees. These results confirmed the successful generation of entangled photon pairs with high visibilities using a silicon wire waveguide. The visibility degradation in the fringe for θs=45 degrees was probably due to imperfect polarization adjustment in the signal and idler channels.

 figure: Fig. 2.

Fig. 2. Two-photon interference fringes. Squares: θs=0 degrees, circles: θs=45 degrees.

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4. Discussion

The full width at half maximum of the photon pair temporal width was 18 ps, which is about one fifth of the pump pulse width. In this parameter regime, the number distribution of the photon pairs is well approximated with a Poissonian [28]. When x photons are incident on a threshold single photon detector (i.e. a photon detector without photon number resolving capability), the detection probability is given by 1-(1-α)x, where α denotes the collection efficiency including the quantum efficiency of the detector. When α≪1, the detection probability is approximated as . In our setup, α was 2.7×10-3 for the signal and 5.5×10-3 for the idler, and so we can use this approximation in the following equations.

If we suppose that no noise photons are generated in our entangled photon pair source, the coincidence probability caused by correlated photons at the peak of the two-photon interference fringe is expressed as

Rc=12μαsαi.

Here, µ, αs and αi are the average photon-pair number per pulse, signal collection efficiency, and idler collection efficiency, respectively. On the other hand, the probability of accidental coincidences caused by uncorrelated photons and detector dark counts is approximated by

 figure: Fig. 3.

Fig. 3. Idler count rates as a function of idler polarizer angle. Squares: θs=0 degrees, circles: θs=45 degrees.

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Racc=(12μαs+ds)·(12μαi+di),

where ds and di denote the detector dark count per gate for the signal and idler channels, respectively. The factor 1/2 is present in the above two equations because we used a polarizer followed by one detector for each channel and so we discarded half of the photons. Since the maximum Imax and miminum points Imin in a two-photon interference fringe are given by Rc+Racc and Racc, respectively, the visibility of the two-photon interference fringe is given by

V=ImaxIminImax+Imin=RcRc+2Racc.

Using the parameters given in the previous sections, the theoretical visibility for µ=0.05 is calculated to be 93.1%, which is close to the experimental result for θs=0 degrees. This implies that we have not observed noise photons in our two-photon interference experiments, and thus proves that our entanglement source has low-noise characteristics.

We note that a team from Northwestern and Cornell Universities has reported a polarization entanglement generation experiment using a similar loop configuration with a silicon chip during the preparation of this paper [29]. The important difference is that they only showed a fringe for one measurement basis, while we obtained fringes for two nonorthogonal measurement bases. In theory, a coincidence measurement on a classically correlated state whose density matrix in the H-V basis is given by

ρ=(1000000000000001)

shows a fringe if the measurement is undertaken only with the H-V basis. Clearly, the fringe will disappear in a measurement, for example, with a diagonal basis. In contrast, an example entangled state is expressed as

ρ=(1001000000001001).

According to this equation, an entangled state should show correlation in measurements with nonorthogonal bases. Therefore, our experimental result with two nonorthogonal bases gives better confirmation of entanglement generation. Although we believe that the present result clearly demonstrated the existence of entanglement, a more detailed characterization of our entanglement source is important future work. Experiments such as Bell’s inequality measurement [30] and quantum state tomography measurement [31] are suitable for this purpose.

One of the problems with the current experiment is the relatively large channel losses that made the coincidence rate very low. Although the channel losses are an accumulation of losses caused by many components, a large portion of the losses are from the coupling between the output of the silicon wire waveguide and the fiber. With the current setup, we used a fiber coupling system designed for larger waveguides such as a PPLN waveguide, which resulted in a relatively large coupling loss of approximately 4 dB. With an improved fiber coupling system, we can expect a coupling loss of <1 dB. It is also important to reduce the loss of other components such as the circulator, the fiber Bragg grating, and the arrayed waveguide grating so that we can make the entanglement source more practical.

A quantum correlation measurement reported in [17] suggests that fewer noise photons were generated by SpRS in the silicon wire waveguide than in a DSF at room temperature. However, we need a more thorough investigation to determine whether or not the SpRS photons are completely suppressed. For example, a temporal correlation measurement using detectors with better sensitivity, such as those based on superconducting devices [32, 33], can provide a good confirmation experiment.

The photon-pair generation efficiency obtained using the 3.1-dB loss waveguide is already as good as that of a 500-m DSF [17]. With the recent technological advancement, the loss of a silicon wire waveguide can be as small as <1.5 dB, and a length of up to ~6 cm is already available. According to the theory in [14], if we use a 4-cm long, phase-matched silicon wire waveguide with a 1.5-dB loss, the generation efficiency can be increased by approximately 5 times. Thus, we can expect further improvement of brightness in the near future.

5. Conclusion

We have reported polarization entangled photon pair generation using a silicon wire waveguide. We employed a fiber loop that contained a silicon waveguide to realize the stable generation of a maximally polarization-entangled state in the 1.5-µm band. We obtained a high-purity entangled state that showed >83%-visibility two-photon interference without temperature control. This result suggests that we may be able to construct a simple and robust entanglement source that consists of passive devices (other than the pump laser) without temperature control.

References and links

1. N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002). [CrossRef]  

2. P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007). [CrossRef]  

3. A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003). [CrossRef]  

4. H. Takesue, K. Inoue, O. Tadanaga, Y. Nishida, and M. Asobe, “Generation of pulsed polarization-entangled photon pairs in a 1.55-µm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit,” Opt. Lett. 30, 293 (2005). [CrossRef]   [PubMed]  

5. M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007). [CrossRef]  

6. X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005). [CrossRef]   [PubMed]  

7. H. Takesue and K. Inoue, “Generation of polarization entangled photon pairs and violation of Bell’s inequality using spontaneous four-wave mixing in fiber loop,” Phys. Rev. A 70, 031802(R) (2004). [CrossRef]  

8. T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007). [CrossRef]  

9. H. Takesue, “1.5-µm band Hong-Ou-Mandel experiment using photon pairs generated in two independent dispersion shifted fibers,” Appl. Phys. Lett. 90, 204101 (2007). [CrossRef]  

10. E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002). [CrossRef]  

11. D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005). [CrossRef]  

12. K. Inoue and K. Shimizu, “Generation of quantum-correlated photon pairs in optical fiber: influence of spontaneous Raman scattering,” Jpn. J. Appl. Phys. 43, 8048–8052 (2004). [CrossRef]  

13. H. Takesue and K. Inoue, “1.5-µm band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber,” Opt. Express 13, 7832–7839 (2005). [CrossRef]   [PubMed]  

14. Q. Lin and G. P. Agrawal, “Silicon waveguides for creating quantum-correlated photon pairs,” Opt. Lett. 31, 3140 (2006). [CrossRef]   [PubMed]  

15. J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006). [CrossRef]   [PubMed]  

16. R. Claps, D. Dimitropoulos, Y. Han, and B. Jalali, “Observation of Raman emission in silicon waveguides at 1.54 µm,” Opt. Express 10, 1305 (2002). [PubMed]  

17. H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007). [CrossRef]  

18. J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999). [CrossRef]  

19. D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007). [CrossRef]  

20. J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998). [CrossRef]  

21. T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003). [CrossRef]   [PubMed]  

22. J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003). [CrossRef]  

23. X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006). [CrossRef]  

24. J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007). [CrossRef]   [PubMed]  

25. J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007). [CrossRef]  

26. T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005). [CrossRef]  

27. H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005). [CrossRef]   [PubMed]  

28. H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

29. K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

30. J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969). [CrossRef]  

31. D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001). [CrossRef]  

32. G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001). [CrossRef]  

33. A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003). [CrossRef]  

References

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  1. N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
    [Crossref]
  2. P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
    [Crossref]
  3. A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003).
    [Crossref]
  4. H. Takesue, K. Inoue, O. Tadanaga, Y. Nishida, and M. Asobe, “Generation of pulsed polarization-entangled photon pairs in a 1.55-µm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit,” Opt. Lett. 30, 293 (2005).
    [Crossref] [PubMed]
  5. M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
    [Crossref]
  6. X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
    [Crossref] [PubMed]
  7. H. Takesue and K. Inoue, “Generation of polarization entangled photon pairs and violation of Bell’s inequality using spontaneous four-wave mixing in fiber loop,” Phys. Rev. A 70, 031802(R) (2004).
    [Crossref]
  8. T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
    [Crossref]
  9. H. Takesue, “1.5-µm band Hong-Ou-Mandel experiment using photon pairs generated in two independent dispersion shifted fibers,” Appl. Phys. Lett. 90, 204101 (2007).
    [Crossref]
  10. E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002).
    [Crossref]
  11. D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005).
    [Crossref]
  12. K. Inoue and K. Shimizu, “Generation of quantum-correlated photon pairs in optical fiber: influence of spontaneous Raman scattering,” Jpn. J. Appl. Phys. 43, 8048–8052 (2004).
    [Crossref]
  13. H. Takesue and K. Inoue, “1.5-µm band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber,” Opt. Express 13, 7832–7839 (2005).
    [Crossref] [PubMed]
  14. Q. Lin and G. P. Agrawal, “Silicon waveguides for creating quantum-correlated photon pairs,” Opt. Lett. 31, 3140 (2006).
    [Crossref] [PubMed]
  15. J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
    [Crossref] [PubMed]
  16. R. Claps, D. Dimitropoulos, Y. Han, and B. Jalali, “Observation of Raman emission in silicon waveguides at 1.54 µm,” Opt. Express 10, 1305 (2002).
    [PubMed]
  17. H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
    [Crossref]
  18. J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
    [Crossref]
  19. D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
    [Crossref]
  20. J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
    [Crossref]
  21. T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
    [Crossref] [PubMed]
  22. J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
    [Crossref]
  23. X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
    [Crossref]
  24. J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
    [Crossref] [PubMed]
  25. J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007).
    [Crossref]
  26. T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
    [Crossref]
  27. H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
    [Crossref] [PubMed]
  28. H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).
  29. K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.
  30. J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
    [Crossref]
  31. D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
    [Crossref]
  32. G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
    [Crossref]
  33. A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
    [Crossref]

2007 (8)

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
[Crossref]

H. Takesue, “1.5-µm band Hong-Ou-Mandel experiment using photon pairs generated in two independent dispersion shifted fibers,” Appl. Phys. Lett. 90, 204101 (2007).
[Crossref]

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007).
[Crossref]

2006 (3)

2005 (6)

D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005).
[Crossref]

X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
[Crossref] [PubMed]

H. Takesue, K. Inoue, O. Tadanaga, Y. Nishida, and M. Asobe, “Generation of pulsed polarization-entangled photon pairs in a 1.55-µm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit,” Opt. Lett. 30, 293 (2005).
[Crossref] [PubMed]

H. Takesue and K. Inoue, “1.5-µm band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber,” Opt. Express 13, 7832–7839 (2005).
[Crossref] [PubMed]

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

2004 (3)

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

H. Takesue and K. Inoue, “Generation of polarization entangled photon pairs and violation of Bell’s inequality using spontaneous four-wave mixing in fiber loop,” Phys. Rev. A 70, 031802(R) (2004).
[Crossref]

K. Inoue and K. Shimizu, “Generation of quantum-correlated photon pairs in optical fiber: influence of spontaneous Raman scattering,” Jpn. J. Appl. Phys. 43, 8048–8052 (2004).
[Crossref]

2003 (4)

A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003).
[Crossref]

T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
[Crossref] [PubMed]

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
[Crossref]

2002 (3)

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
[Crossref]

E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002).
[Crossref]

R. Claps, D. Dimitropoulos, Y. Han, and B. Jalali, “Observation of Raman emission in silicon waveguides at 1.54 µm,” Opt. Express 10, 1305 (2002).
[PubMed]

2001 (2)

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
[Crossref]

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

1999 (1)

J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
[Crossref]

1998 (1)

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
[Crossref]

1969 (1)

J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
[Crossref]

Acin, A.

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

Agrawal, G. P.

Alibart, O.

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

Asobe, M.

Beveratos, A.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

Bouwmeester, D.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
[Crossref]

Brendel, J.

J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
[Crossref]

Chen, J.

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

Chulkova, G.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Claps, R.

Clauser, J. F.

J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
[Crossref]

Collins, D.

D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005).
[Crossref]

de Riedmatten, H.

D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005).
[Crossref]

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

Dimitropoulos, D.

Dzadanov, A.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Eibl, M.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

Eisaman, M. D.

J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007).
[Crossref]

Fan, J.

J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007).
[Crossref]

Foster, M. A.

J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Fukuda, H.

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

Fulconis, J.

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

Gaeta, A. L.

J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Gasparoni, S.

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

Gisin, N.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005).
[Crossref]

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
[Crossref]

J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
[Crossref]

Gol’tsman, G. N.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Halder, M.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

Han, Y.

Holt, R. A.

J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
[Crossref]

Horne, M. A.

J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
[Crossref]

Imoto, N.

T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
[Crossref] [PubMed]

Inoue, K.

H. Takesue and K. Inoue, “1.5-µm band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber,” Opt. Express 13, 7832–7839 (2005).
[Crossref] [PubMed]

H. Takesue, K. Inoue, O. Tadanaga, Y. Nishida, and M. Asobe, “Generation of pulsed polarization-entangled photon pairs in a 1.55-µm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit,” Opt. Lett. 30, 293 (2005).
[Crossref] [PubMed]

H. Takesue and K. Inoue, “Generation of polarization entangled photon pairs and violation of Bell’s inequality using spontaneous four-wave mixing in fiber loop,” Phys. Rev. A 70, 031802(R) (2004).
[Crossref]

K. Inoue and K. Shimizu, “Generation of quantum-correlated photon pairs in optical fiber: influence of spontaneous Raman scattering,” Jpn. J. Appl. Phys. 43, 8048–8052 (2004).
[Crossref]

Itabashi, S.

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

Jalali, B.

James, D. F. V.

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
[Crossref]

Kaji, R.

A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003).
[Crossref]

Kim, H.

T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
[Crossref]

Kim, J.

T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
[Crossref]

Koashi, M.

T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
[Crossref] [PubMed]

Kok, P.

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

Kumar, P.

J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
[Crossref] [PubMed]

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Kwiat, P. G.

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
[Crossref]

Lee, K. F.

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Li, X.

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
[Crossref] [PubMed]

Liang, C.

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

Lin, Q.

Lipatov, A.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Lipson, M.

J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Marcikic, I.

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

Martinis, J. M.

A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
[Crossref]

Mattle, K.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

Migdall, A.

J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007).
[Crossref]

Milburn, G. J.

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

Miller, A. J.

A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
[Crossref]

Morita, H.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

Munro, W. J.

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
[Crossref]

Nam, S. W.

A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
[Crossref]

Nemoto, K.

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

Nishida, Y.

Noh, T. G.

T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
[Crossref]

O’Brien, J. L.

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

Okunev, O.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Ozdemir, S. K.

T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
[Crossref] [PubMed]

Pan, J. W.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
[Crossref]

Ralph, T. C.

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

Rarity, J. G.

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

Ribordy, G.

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
[Crossref]

Scarani, V.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

Schmidt, B. S.

Semenov, A.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Sergienko, A. V.

A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
[Crossref]

Sharping, J.

Sharping, J. E.

X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Shimizu, K.

K. Inoue and K. Shimizu, “Generation of quantum-correlated photon pairs in optical fiber: influence of spontaneous Raman scattering,” Jpn. J. Appl. Phys. 43, 8048–8052 (2004).
[Crossref]

Shimony, A.

J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
[Crossref]

Shoji, T.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

Simon, C.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

Sminov, K.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Sobolewski, R.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Tadanaga, O.

Takahashi, J.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

Takahashi, M.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

Takesue, H.

H. Takesue, “1.5-µm band Hong-Ou-Mandel experiment using photon pairs generated in two independent dispersion shifted fibers,” Appl. Phys. Lett. 90, 204101 (2007).
[Crossref]

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

H. Takesue and K. Inoue, “1.5-µm band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber,” Opt. Express 13, 7832–7839 (2005).
[Crossref] [PubMed]

H. Takesue, K. Inoue, O. Tadanaga, Y. Nishida, and M. Asobe, “Generation of pulsed polarization-entangled photon pairs in a 1.55-µm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit,” Opt. Lett. 30, 293 (2005).
[Crossref] [PubMed]

H. Takesue and K. Inoue, “Generation of polarization entangled photon pairs and violation of Bell’s inequality using spontaneous four-wave mixing in fiber loop,” Phys. Rev. A 70, 031802(R) (2004).
[Crossref]

Tamechika, E.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

Tittel, W.

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
[Crossref]

J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
[Crossref]

Tokura, Y.

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

Tsuchida, H.

A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003).
[Crossref]

Tsuchizawa, T.

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

Turner, A. C.

J. Sharping, K. F. Lee, M. A. Foster, A. C. Turner, B. S. Schmidt, M. Lipson, A. L. Gaeta, and P. Kumar, “Generation of correlated photons in nanoscale silicon waveguides,” Opt. Express 14, 12388 (2006).
[Crossref] [PubMed]

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

Ursin, R.

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

Voronov, B.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Voss, P. L.

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
[Crossref] [PubMed]

Wadsworth, W. J.

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

Waks, E.

E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002).
[Crossref]

Watanabe, T.

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

Weihs, G.

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

Weinfurter, H.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
[Crossref]

White, A. G.

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
[Crossref]

Williams, C.

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

Yamada, K.

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

H. Fukuda, K. Yamada, T. Shoji, M. Takahashi, T. Tsuchizawa, T. Watanabe, J. Takahashi, and S. Itabashi, “Four-wave mixing in silicon wire waveguides,” Opt. Express 13, 4629 (2005).
[Crossref] [PubMed]

Yamamoto, T.

T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
[Crossref] [PubMed]

Yamamoto, Y.

E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002).
[Crossref]

Yoshizawa, A.

A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003).
[Crossref]

Zbinden, H.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
[Crossref]

J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
[Crossref]

Zeevi, A.

E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002).
[Crossref]

Zeilinger, A.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
[Crossref]

Zyung, T.

T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
[Crossref]

Appl. Phys. Lett. (5)

T. G. Noh, H. Kim, T. Zyung, and J. Kim, “Efficient source of high purity polarization-entangled photon pairs in the 1550 nm telecommunication band,” Appl. Phys. Lett. 90, 011116 (2007).
[Crossref]

H. Takesue, “1.5-µm band Hong-Ou-Mandel experiment using photon pairs generated in two independent dispersion shifted fibers,” Appl. Phys. Lett. 90, 204101 (2007).
[Crossref]

H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, “Entanglement generation using silicon wire waveguide,” Appl. Phys. Lett. 91, 201108 (2007).
[Crossref]

G. N. Gol’tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Sminov, B. Voronov, A. Dzadanov, C. Williams, and R. Sobolewski, “Picosecond superconducting single-photon optical detector,” Appl. Phys. Lett. 79, 705 (2001).
[Crossref]

A. J. Miller, S. W. Nam, J. M. Martinis, and A. V. Sergienko, “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).
[Crossref]

Electron. Lett. (1)

A. Yoshizawa, R. Kaji, and H. Tsuchida, “Generation of polarization-entangled photon pairs at 1550 nm using two PPLN wavetguides,” Electron. Lett. 39, 621 (2003).
[Crossref]

IEEE J. Sel. Top. Quantum Electron. (1)

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, “Microphotonics devices based on silicon microfabrication technology,” IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[Crossref]

J. Mod. Opt. (2)

H. de Riedmatten, V. Scarani, I. Marcikic, A. Acin, W. Tittel, H. Zbinden, and N. Gisin, “Two independent photon pairs versus four-photon entangled states in parametric down conversion,” J. Mod. Opt. 51, 1637 (2004).

D. Collins, N. Gisin, and H. de Riedmatten, “Quantum relays for long distance quantum cryptography,” J. Mod. Opt. 52, 735 (2005).
[Crossref]

Jpn. J. Appl. Phys. (1)

K. Inoue and K. Shimizu, “Generation of quantum-correlated photon pairs in optical fiber: influence of spontaneous Raman scattering,” Jpn. J. Appl. Phys. 43, 8048–8052 (2004).
[Crossref]

Nat. Phys. (1)

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692 (2007).
[Crossref]

Nature (3)

T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, “Experimental extraction of an entangled photon pair from two identically decohered pairs,” Nature 421, 343 (2003).
[Crossref] [PubMed]

J. W. Pan, S. Gasparoni, R. Ursin, G. Weihs, and A. Zeilinger, “Experimental entanglement purification of arbitrary unknown states,” Nature 423, 41–7, (2003).
[Crossref]

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575 (2007).
[Crossref]

Opt. Express (4)

Opt. Lett. (2)

Phys. Rev. A (5)

E. Waks, A. Zeevi, and Y. Yamamoto, “Security of quantum key distribution with entangled photons against individual attacks,” Phys. Rev. A 65, 052310 (2002).
[Crossref]

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001).
[Crossref]

H. Takesue and K. Inoue, “Generation of polarization entangled photon pairs and violation of Bell’s inequality using spontaneous four-wave mixing in fiber loop,” Phys. Rev. A 70, 031802(R) (2004).
[Crossref]

J. Fan, M. D. Eisaman, and A. Migdall, “Bright phase-stable broadband fiber-based source of polarizationentangled photon pairs,” Phys. Rev. A 76, 043836 (2007).
[Crossref]

X. Li, C. Liang, K. F. Lee, J. Chen, P. L. Voss, and P. Kumar, “Integrable optical-fiber source of polarizationentangled photon pairs in the telecom band,” Phys. Rev. A 73, 052301 (2006).
[Crossref]

Phys. Rev. Lett. (5)

J. Fulconis, O. Alibart, J. L. O’Brien, W. J. Wadsworth, and J. G. Rarity, “Nonclassical interference and entanglement generation using a photonic crystal fiber pair photon source,” Phys. Rev. Lett. 99, 120501 (2007).
[Crossref] [PubMed]

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891 (1998).
[Crossref]

J. F. Clauser, M. A. Horne, A. Shimony, and R. A. Holt, “Proposed experiment to test local hidden-variable theories,” Phys. Rev. Lett. 23, 880 (1969).
[Crossref]

X. Li, P. L. Voss, J. E. Sharping, and P. Kumar, “Optical fiber-source of polarization-entangled photons in the 1550 nm telecom band,” Phys. Rev. Lett. 94, 053601 (2005).
[Crossref] [PubMed]

J. Brendel, N. Gisin, W. Tittel, and H. Zbinden, “Pulsed energy-time entangled twin-photon source for quantum communication,” Phys. Rev. Lett. 82, 2594–2597 (1999).
[Crossref]

Rev. Mod. Phys. (2)

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum cryptography,” Rev. Mod. Phys. 74, 145 (2002).
[Crossref]

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, and G. J. Milburn, “Linear optical quantum computing with photonic qubits” Rev. Mod. Phys. 79, 135 (2007).
[Crossref]

Other (1)

K. F. Lee, P. Kumar, J. E. Sharping, M. A. Foster, A. L. Gaeta, A. C. Turner, and M. Lipson, “Telecom-band entanglement generation for chipscale quantum processing,” arXiv:0801.2606 (quant-ph) 17 January, 2008.

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Figures (3)

Fig. 1.
Fig. 1. Experimental setup. PBS: polarization beam splitter, PC: polarization controller.
Fig. 2.
Fig. 2. Two-photon interference fringes. Squares: θs =0 degrees, circles: θs =45 degrees.
Fig. 3.
Fig. 3. Idler count rates as a function of idler polarizer angle. Squares: θs =0 degrees, circles: θs =45 degrees.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

R c = 1 2 μ α s α i .
R acc = ( 1 2 μ α s + d s ) · ( 1 2 μ α i + d i ) ,
V = I max I min I max + I min = R c R c + 2 R acc .
ρ = ( 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 )
ρ = ( 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 ) .

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