Abstract

We demonstrate real-time continuous-wave terahertz (THz) line-scanned imaging based on a 1 × 240 InGaAs Schottky barrier diode (SBD) array detector with a scan velocity of 25 cm/s, a scan line length of 12 cm, and a pixel size of 0.5 × 0.5 mm2. Foreign substances, such as a paper clip with a spatial resolution of approximately 1 mm that is hidden under a cracker, are clearly detected by this THz line-scanning system. The system consists of the SBD array detector, a 200-GHz gyrotron source, a conveyor system, and several optical components such as a high-density polyethylene cylindrical lens, metal cylindrical mirror, and THz wire-grid polarizer. Using the THz polarizer, the signal-to-noise ratio of the SBD array detector improves because the quality of the source beam is enhanced.

© 2014 Optical Society of America

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  1. M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
    [Crossref]
  2. D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
    [Crossref]
  3. G. Ok, S.-W. Choi, K. H. Park, and H. S. Chun, “Foreign object detection by sub-terahertz quasi-Bessel beam imaging,” Sensors (Basel) 13(1), 71–85 (2013).
    [Crossref] [PubMed]
  4. M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
    [Crossref]
  5. A. Rogalski and F. Sizov, “Terahertz detectors and focal plane arrays,” Opto-Electron. Rev. 19(3), 346–404 (2011).
    [Crossref]
  6. N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
    [Crossref]
  7. N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
    [Crossref]
  8. Q. Li, S.-H. Ding, R. Yao, and Q. Wang, “Real-time terahertz scanning imaging by use of a pyroelectric array camera and image denoising,” J. Opt. Soc. Am. A 27(11), 2381–2386 (2010).
    [Crossref] [PubMed]
  9. A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
    [Crossref]
  10. R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
    [Crossref]
  11. S.-P. Han, H. Ko, J.-W. Park, N. Kim, Y.-J. Yoon, J.-H. Shin, D. Y. Kim, D. H. Lee, and K. H. Park, “InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner,” Opt. Express 21(22), 25874–25882 (2013).
    [Crossref] [PubMed]
  12. C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
    [Crossref]
  13. U. V. Bhapkar, Y. Li, and R. J. Mattauch, “InGaAs-InP heteroepitaxial Schottky barrier diodes for terahertz applications,” Proc. ISSTT, 661–677 (1991).
  14. I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).
  15. A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
    [Crossref]
  16. J. L. Johnson, T. D. Dorney, and D. M. Mittleman, “Enhanced depth resolution in terahertz imaging using phase-shift interferometry,” Appl. Phys. Lett. 78(6), 835–837 (2001).
    [Crossref]
  17. N. C. J. van der Valk, W. A. M. van der Marel, and P. C. M. Planken, “Terahertz polarization imaging,” Opt. Lett. 30(20), 2802–2804 (2005).
    [Crossref] [PubMed]
  18. S. Katletz, M. Pfleger, H. Pühringer, M. Mikulics, N. Vieweg, O. Peters, B. Scherger, M. Scheller, M. Koch, and K. Wiesauer, “Polarization sensitive terahertz imaging: detection of birefringence and optical axis,” Opt. Express 20(21), 23025–23035 (2012).
    [Crossref] [PubMed]
  19. W. L. Chan, M. L. Moravec, R. G. Baraniuk, and D. M. Mittleman, “Terahertz imaging with compressed sensing and phase retrieval,” Opt. Lett. 33(9), 974–976 (2008).
    [Crossref] [PubMed]
  20. G. C. Walker, J. W. Bowen, J. Labaune, J.-B. Jackson, S. Hadjiloucas, J. Roberts, G. Mourou, and M. Menu, “Terahertz deconvolution,” Opt. Express 20(25), 27230–27241 (2012).
    [Crossref] [PubMed]
  21. N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
    [Crossref]
  22. K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
    [Crossref]
  23. S.-P. Han, N. Kim, H. Ko, H.-C. Ryu, J. W. Park, Y.-J. Yoon, J.-H. Shin, D. H. Lee, S.-H. Park, S.-H. Moon, S.-W. Choi, H. S. Chun, and K. H. Park, “Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection,” Opt. Express 20(16), 18432–18439 (2012).
    [Crossref] [PubMed]
  24. S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
    [Crossref]

2014 (1)

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

2013 (2)

2012 (6)

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

S. Katletz, M. Pfleger, H. Pühringer, M. Mikulics, N. Vieweg, O. Peters, B. Scherger, M. Scheller, M. Koch, and K. Wiesauer, “Polarization sensitive terahertz imaging: detection of birefringence and optical axis,” Opt. Express 20(21), 23025–23035 (2012).
[Crossref] [PubMed]

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

S.-P. Han, N. Kim, H. Ko, H.-C. Ryu, J. W. Park, Y.-J. Yoon, J.-H. Shin, D. H. Lee, S.-H. Park, S.-H. Moon, S.-W. Choi, H. S. Chun, and K. H. Park, “Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection,” Opt. Express 20(16), 18432–18439 (2012).
[Crossref] [PubMed]

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

G. C. Walker, J. W. Bowen, J. Labaune, J.-B. Jackson, S. Hadjiloucas, J. Roberts, G. Mourou, and M. Menu, “Terahertz deconvolution,” Opt. Express 20(25), 27230–27241 (2012).
[Crossref] [PubMed]

2011 (2)

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

A. Rogalski and F. Sizov, “Terahertz detectors and focal plane arrays,” Opto-Electron. Rev. 19(3), 346–404 (2011).
[Crossref]

2010 (2)

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

Q. Li, S.-H. Ding, R. Yao, and Q. Wang, “Real-time terahertz scanning imaging by use of a pyroelectric array camera and image denoising,” J. Opt. Soc. Am. A 27(11), 2381–2386 (2010).
[Crossref] [PubMed]

2008 (2)

W. L. Chan, M. L. Moravec, R. G. Baraniuk, and D. M. Mittleman, “Terahertz imaging with compressed sensing and phase retrieval,” Opt. Lett. 33(9), 974–976 (2008).
[Crossref] [PubMed]

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

2007 (1)

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
[Crossref]

2006 (1)

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

2005 (3)

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
[Crossref]

N. C. J. van der Valk, W. A. M. van der Marel, and P. C. M. Planken, “Terahertz polarization imaging,” Opt. Lett. 30(20), 2802–2804 (2005).
[Crossref] [PubMed]

2003 (1)

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

2001 (1)

J. L. Johnson, T. D. Dorney, and D. M. Mittleman, “Enhanced depth resolution in terahertz imaging using phase-shift interferometry,” Appl. Phys. Lett. 78(6), 835–837 (2001).
[Crossref]

Baraniuk, R. G.

Bhapkar, U. V.

U. V. Bhapkar, Y. Li, and R. J. Mattauch, “InGaAs-InP heteroepitaxial Schottky barrier diodes for terahertz applications,” Proc. ISSTT, 661–677 (1991).

Bowen, J. W.

Brown, E. R.

D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
[Crossref]

Cathelin, A.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Chan, W. L.

Choi, J.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

Choi, S.-W.

Chun, H. S.

Cluff, J. A.

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

Cojocari, O.

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Cole, B. E.

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

Ding, S.-H.

Dorney, T. D.

J. L. Johnson, T. D. Dorney, and D. M. Mittleman, “Enhanced depth resolution in terahertz imaging using phase-shift interferometry,” Appl. Phys. Lett. 78(6), 835–837 (2001).
[Crossref]

Fitzgerald, A. J.

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

Forster, W.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Gibson, H.

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Goebel, T.

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

Grzyb, J.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Hadi, R.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Hadjiloucas, S.

Han, S.-P.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

S.-P. Han, H. Ko, J.-W. Park, N. Kim, Y.-J. Yoon, J.-H. Shin, D. Y. Kim, D. H. Lee, and K. H. Park, “InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner,” Opt. Express 21(22), 25874–25882 (2013).
[Crossref] [PubMed]

S.-P. Han, N. Kim, H. Ko, H.-C. Ryu, J. W. Park, Y.-J. Yoon, J.-H. Shin, D. H. Lee, S.-H. Park, S.-H. Moon, S.-W. Choi, H. S. Chun, and K. H. Park, “Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection,” Opt. Express 20(16), 18432–18439 (2012).
[Crossref] [PubMed]

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Han, S.-T.

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

Hartnagel, H. L.

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Hosako, I.

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

Hu, Q.

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

Hübers, H.-W.

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

Hwang, J.-S.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Ishi, T.

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

Jackson, J.-B.

Jeon, M. Y.

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Johnson, J. L.

J. L. Johnson, T. D. Dorney, and D. M. Mittleman, “Enhanced depth resolution in terahertz imaging using phase-shift interferometry,” Appl. Phys. Lett. 78(6), 835–837 (2001).
[Crossref]

Kaiser, A.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Kang, K.-Y.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

Karpowicz, N.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Katletz, S.

Keller, H. M.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Kemp, M.

D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
[Crossref]

Kemp, M. C.

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

Kim, D. Y.

Kim, N.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

S.-P. Han, H. Ko, J.-W. Park, N. Kim, Y.-J. Yoon, J.-H. Shin, D. Y. Kim, D. H. Lee, and K. H. Park, “InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner,” Opt. Express 21(22), 25874–25882 (2013).
[Crossref] [PubMed]

S.-P. Han, N. Kim, H. Ko, H.-C. Ryu, J. W. Park, Y.-J. Yoon, J.-H. Shin, D. H. Lee, S.-H. Park, S.-H. Moon, S.-W. Choi, H. S. Chun, and K. H. Park, “Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection,” Opt. Express 20(16), 18432–18439 (2012).
[Crossref] [PubMed]

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Klushin, A.

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

Ko, H.

Koch, M.

Kumar, S.

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

Labaune, J.

Lee, A. W. M.

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

Lee, C. W.

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Lee, D.

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Lee, D. H.

Leem, Y. A.

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Li, Q.

Li, Y.

U. V. Bhapkar, Y. Li, and R. J. Mattauch, “InGaAs-InP heteroepitaxial Schottky barrier diodes for terahertz applications,” Proc. ISSTT, 661–677 (1991).

Lin, K.-I.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Mattauch, R. J.

U. V. Bhapkar, Y. Li, and R. J. Mattauch, “InGaAs-InP heteroepitaxial Schottky barrier diodes for terahertz applications,” Proc. ISSTT, 661–677 (1991).

Meissner, P.

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

Menu, M.

Mikulics, M.

Mittleman, D. M.

W. L. Chan, M. L. Moravec, R. G. Baraniuk, and D. M. Mittleman, “Terahertz imaging with compressed sensing and phase retrieval,” Opt. Lett. 33(9), 974–976 (2008).
[Crossref] [PubMed]

J. L. Johnson, T. D. Dorney, and D. M. Mittleman, “Enhanced depth resolution in terahertz imaging using phase-shift interferometry,” Appl. Phys. Lett. 78(6), 835–837 (2001).
[Crossref]

Moon, K.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

Moon, S.-H.

Moravec, M. L.

Mourou, G.

Müller, A.-S.

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

Oda, N.

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

Ok, G.

G. Ok, S.-W. Choi, K. H. Park, and H. S. Chun, “Foreign object detection by sub-terahertz quasi-Bessel beam imaging,” Sensors (Basel) 13(1), 71–85 (2013).
[Crossref] [PubMed]

Oprea, I.

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Park, J. W.

Park, J.-W.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

S.-P. Han, H. Ko, J.-W. Park, N. Kim, Y.-J. Yoon, J.-H. Shin, D. Y. Kim, D. H. Lee, and K. H. Park, “InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner,” Opt. Express 21(22), 25874–25882 (2013).
[Crossref] [PubMed]

Park, K. H.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

S.-P. Han, H. Ko, J.-W. Park, N. Kim, Y.-J. Yoon, J.-H. Shin, D. Y. Kim, D. H. Lee, and K. H. Park, “InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner,” Opt. Express 21(22), 25874–25882 (2013).
[Crossref] [PubMed]

G. Ok, S.-W. Choi, K. H. Park, and H. S. Chun, “Foreign object detection by sub-terahertz quasi-Bessel beam imaging,” Sensors (Basel) 13(1), 71–85 (2013).
[Crossref] [PubMed]

S.-P. Han, N. Kim, H. Ko, H.-C. Ryu, J. W. Park, Y.-J. Yoon, J.-H. Shin, D. H. Lee, S.-H. Park, S.-H. Moon, S.-W. Choi, H. S. Chun, and K. H. Park, “Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection,” Opt. Express 20(16), 18432–18439 (2012).
[Crossref] [PubMed]

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

Park, S.-H.

Pepper, M.

D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
[Crossref]

Peters, O.

Pfeiffer, U.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Pfleger, M.

Planken, P. C. M.

Pühringer, H.

Reno, J. L.

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

Roberts, J.

Rogalski, A.

A. Rogalski and F. Sizov, “Terahertz detectors and focal plane arrays,” Opto-Electron. Rev. 19(3), 346–404 (2011).
[Crossref]

Ryu, H.-C.

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

S.-P. Han, N. Kim, H. Ko, H.-C. Ryu, J. W. Park, Y.-J. Yoon, J.-H. Shin, D. H. Lee, S.-H. Park, S.-H. Moon, S.-W. Choi, H. S. Chun, and K. H. Park, “Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection,” Opt. Express 20(16), 18432–18439 (2012).
[Crossref] [PubMed]

Schçnherr, D.

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

Scheller, M.

Scherger, B.

Semenov, A.

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

Shapiro, M. A.

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

Sherry, H.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Shin, J.-H.

Sirigiri, J. R.

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

Sizov, F.

A. Rogalski and F. Sizov, “Terahertz detectors and focal plane arrays,” Opto-Electron. Rev. 19(3), 346–404 (2011).
[Crossref]

Song, F.

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

Sydlo, C.

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

Taday, P. F.

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

Temkin, R. J.

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

Tonouchi, M.

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
[Crossref]

Torrezan, A. C.

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

Tribe, W. R.

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

van der Marel, W. A. M.

van der Valk, N. C. J.

Vieweg, N.

Walber, A.

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Walker, G. C.

Wang, Q.

Wiesauer, K.

Williams, B. S.

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

Woolard, D. L.

D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
[Crossref]

Xu, J.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Yao, R.

Yoon, Y.-J.

Zhang, C.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Zhang, X.-C.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Zhao, Y.

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

Zhong, H.

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

Zimmermann, R.

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Appl. Phys. Lett. (2)

N. Karpowicz, H. Zhong, C. Zhang, K.-I. Lin, J.-S. Hwang, J. Xu, and X.-C. Zhang, “Compact continuous-wave subterahertz system for inspection applications,” Appl. Phys. Lett. 86(5), 054105 (2005).
[Crossref]

J. L. Johnson, T. D. Dorney, and D. M. Mittleman, “Enhanced depth resolution in terahertz imaging using phase-shift interferometry,” Appl. Phys. Lett. 78(6), 835–837 (2001).
[Crossref]

ETRI J. (2)

N. Kim, Y. A. Leem, M. Y. Jeon, C. W. Lee, S.-P. Han, D. Lee, and K. H. Park, “Widely tunable 1.55 µm detuned dual mode laser diode for compact continuous-wave THz emitter,” ETRI J. 33(5), 810–813 (2011).
[Crossref]

K. Moon, J. Choi, J.-H. Shin, S.-P. Han, H. Ko, N. Kim, J.-W. Park, Y.-J. Yoon, K.-Y. Kang, H.-C. Ryu, and K. H. Park, “Generation and detection of terahertz waves using low-temperature-grown GaAs with an annealing process,” ETRI J. 36(1), 159–162 (2014).
[Crossref]

Frequenz (1)

C. Sydlo, O. Cojocari, D. Schçnherr, T. Goebel, P. Meissner, and H. L. Hartnagel, “Fast THz detectors based on InGaAs Schottky diodes,” Frequenz 62(5-6), 107–110 (2008).
[Crossref]

IEEE Electron Device Lett. (1)

A. Semenov, O. Cojocari, H.-W. Hübers, F. Song, A. Klushin, and A.-S. Müller, “Application of zero-bias quasi-optical Schottky-diode detectors for monitoring short-pulse and weak terahertz radiation,” IEEE Electron Device Lett. 31(7), 674–676 (2010).
[Crossref]

IEEE J. Solid-State Circuits (1)

R. Hadi, H. Sherry, J. Grzyb, Y. Zhao, W. Forster, H. M. Keller, A. Cathelin, A. Kaiser, and U. Pfeiffer, “A 1 k-pixel video camera for 0.7-1.1 terahertz imaging applications in 65-nm CMOS,” IEEE J. Solid-State Circuits 47(12), 2999–3012 (2012).
[Crossref]

IEEE Photon. Technol. Lett. (1)

A. W. M. Lee, B. S. Williams, S. Kumar, Q. Hu, and J. L. Reno, “Real-time imaging using a 4.3-THz quantum cascade laser and a 320 × 240 microbolometer focal-plane array,” IEEE Photon. Technol. Lett. 18(13), 1415–1417 (2006).
[Crossref]

J. Korean Phys. Soc. (1)

S.-T. Han, A. C. Torrezan, J. R. Sirigiri, M. A. Shapiro, and R. J. Temkin, “Real-time, T-ray imaging using a sub-terahertz gyrotron,” J. Korean Phys. Soc. 60(11), 1857–1861 (2012).
[Crossref]

J. Opt. Soc. Am. A (1)

Nat. Photonics (1)

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
[Crossref]

Opt. Express (4)

Opt. Lett. (2)

Opto-Electron. Rev. (1)

A. Rogalski and F. Sizov, “Terahertz detectors and focal plane arrays,” Opto-Electron. Rev. 19(3), 346–404 (2011).
[Crossref]

Proc. IEEE (1)

D. L. Woolard, E. R. Brown, M. Pepper, and M. Kemp, “Terahertz frequency sensing and imaging: a time of reckoning future applications?” Proc. IEEE 93(10), 1722–1743 (2005).
[Crossref]

Proc. SPIE (2)

N. Oda, A. W. M. Lee, T. Ishi, I. Hosako, and Q. Hu, “Proposal for real-time terahertz imaging system, with palm-size terahertz camera and compact quantum cascade laser,” Proc. SPIE 8363, 83630A (2012).
[Crossref]

M. C. Kemp, P. F. Taday, B. E. Cole, J. A. Cluff, A. J. Fitzgerald, and W. R. Tribe, “Security applications of terahertz technology,” Proc. SPIE 5070, 44–52 (2003).
[Crossref]

Sensors (Basel) (1)

G. Ok, S.-W. Choi, K. H. Park, and H. S. Chun, “Foreign object detection by sub-terahertz quasi-Bessel beam imaging,” Sensors (Basel) 13(1), 71–85 (2013).
[Crossref] [PubMed]

Other (2)

U. V. Bhapkar, Y. Li, and R. J. Mattauch, “InGaAs-InP heteroepitaxial Schottky barrier diodes for terahertz applications,” Proc. ISSTT, 661–677 (1991).

I. Oprea, A. Walber, O. Cojocari, H. Gibson, R. Zimmermann, and H. L. Hartnagel, “183 GHz mixer on InGaAs Schottky diodes,” Proc. ISSTT, 159–160 (2010).

Supplementary Material (1)

» Media 1: MP4 (587 KB)     

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Figures (4)

Fig. 1
Fig. 1 Photographs of (a) 1 × 240 Schottky barrier diode (SBD) array detector module and (b) SBD array chips bonded onto a SBD chip board (CB), and vertically connected onto a SBD data processing board (DPB) in the SBD array detector module. The inset shows an SEM image of an SBD array chip sample.
Fig. 2
Fig. 2 THz line-scanning system setup composed of a gyrotron THz source, 1 × 240 SBD array detector, conveyor system, THz wire-grid polarizer, high-density polyethylene cylindrical lens, and metal cylindrical mirror.
Fig. 3
Fig. 3 (a) Photograph of three metal letters “THZ” and their THz images measured with the THz line-scanning system using a scan velocity of 25 cm/s and a pixel size of 0.5 × 0.5 mm2, for (b) unfocused/polarizer-unused, (c) focused/polarizer-unused, and (d) focused/polarizer-used configurations.
Fig. 4
Fig. 4 (a) Photograph of three crackers with invisible foreign substances under the crackers: empty (left), a metal ring (middle), and paper clip (right). Their THz images were measured by using the THz line-scanning system with a scan velocity of 25 cm/s and a pixel size of 0.5 × 0.5 mm2, for (b) unfocused/polarizer-unused, (c) focused/polarizer-unused, and (d) focused/polarizer-used configurations (Media 1).

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