Abstract

For the first time, a tunable reflected phase reflectarray is demonstrated in the thermal infrared. This is done using thermochromic VO2 square-patch elements in a reflectarray metamaterial configuration. A sixty degree change in reflected phase is measured using a Twyman-Green interferometer, and FTIR measurements show that the resonance reflection minima shifts from 9.2 to 11.2 μm as the sample is heated from 45 through 65 °C. These results are in agreement with finite-element method simulations using the optical properties of VO2 which are measured by infrared ellipsometry.

© 2010 OSA

1. Introduction

In the infrared (IR) band metamaterials have been fabricated for IR systems to control spectral reflection [1], transmission [2], emission [3-4], reflected phase [5], as broad-band wave plates [6], and for molecular detection [7]. Metamaterials are also known to produce unique capabilities for the manipulation of radiation at an artificially engineered surface, such as left handed refraction [8] or focusing of emitted, reflected, or transmitted radiation in the thermal infrared band. In a static metamaterial these capabilities are limited to a small frequency bandwidth and a limited spatial configuration. A tunable metamaterial would be able to scan a specific resonance across the thermal infrared to effectively broaden the useful frequency bandwidth of the device and allow the metamaterial to function at a wider range of angles of incidence or to steer a beam. Tunable reflectarray metamaterials have been used for beam-steering in the radio frequency band [9]. The development of beam steering capabilities without moving parts can be used to improve efficiency and lower costs in solar and infrared energy applications.

Tunable metamaterials have been demonstrated in the THz band [10] and in the near IR [11]. In this article the ability to control reflected phase in a tunable metamaterial is demonstrated for the first time. The results also mark the first tunable metamaterial demonstrated in the thermal infrared band, and the largest resonance shift measured to date in the infrared. This was accomplished using a reflectarray metamaterial configuration [5] consisting of thermochromic VO2 square-patch elements on an amorphous silicon (a-Si) microcavity as shown in Fig. 1 . The reflection spectrum was measured by FTIR at 20 and 70 °C, and the reflected phase was measured at 10.6 μm by a Twyman-Green interferometer as a function of temperature. The reflectarray consisted of an array of square-patches 1.7 μm wide spaced at a 2.1 μm periodicity populating a 15 mm by 4 mm array.

 

Fig. 1 (Color online) Reflectarray metmaterial diagram, A: patterned stripe with 1.7 μm square-patch VO2 elements, B: reflectarray cross section.

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2. Thermochromic VO2 phase transition

Vanadium dioxide (VO2) was first observed in Ref. 12 to undergo a transition from a semiconducting to metallic phase at 67°C. Such thermochromic behavior has been observed in other transition metal oxides such as MnO3 [13], but VO2 has produced the best results to date and may be integrated into metamaterials with a relatively low transition temperature. The metal-to-insulator transition in VO2 is the result of a diffusionless phase transformation from an insulating monoclinic phase to a metallic rutile phase [14]. This phase transformation occurs on a picosecond time scale [15], and thus the transition rate of a thermochromic-tunable metamaterial is effectively limited only by the rate at which the elements may be heated and cooled.

VO2 thin films may be fabricated by reactive electron-beam evaporation [16], reactive sputtering [17], pulsed laser deposition [18], or thermal oxidation of metallic vanadium [19]. The VO2 elements used in this article were made using a reactive-ion version of the thermal oxidation process in Ref. 19 to convert metallic V elements to VO2. V square-patch elements were fabricated using standard electron-beam lithography methods as in Refs. 5 and 20. Figure 2 shows the measured electrical resistivity as a function of temperature and optical constants at 20 and 70 °C for the VO2 used in the square-patch elements. As the resistivity decreases exponentially from 45 through 65 °C there is a change in the optical properties of VO2 resulting in the contrast between 20 and 70 °C. In the thermal IR the index of refraction increases from around 2 to 5, but this is accompanied by an increase in the extinction coefficient. The rutile phase of VO2 does nothave sufficient conductivity to serve as metamaterial elements in traditional split-ring resonator (SRR) designs, and thus the use of VO2 in such designs will only result in a small shift in the resonance frequency. This can be seen in Ref. 11. The transition from a transparent to absorbing state that occurs in VO2 may be best exploited in a metamaterial by coupling VO2 elements to a resonating microcavity which is similar to an absorber frequency selective surface [21].

 

Fig. 2 (Color online) Measured material parameters for VO2, A: Resistivity as a function of temperature, B: IR optical properties (index of refraction n, extinction coefficient k) for VO2 measured by ellipsometry.

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3. FTIR results

The reflectarray metamaterial from Fig. 1 was fabricated by depositing 100 nm of Cr on a Si wafer followed by the deposition of 580 nm of a-Si by electron-beam evaporation. V elements were fabricated on the a-Si cavity using electron-beam lithography. Following liftoff processing the reflectarray was annealed to convert the V elements to VO2. Results from the FTIR measurement compared to finite-element method (FEM) simulations are shown in Fig. 3 . The simulations were done using Ansoft HFSS software which included the measured optical constants of VO2 at 20 and 70 °C. The reflected phase spectrum calculated by HFSS is shown in Fig. 3(b). The reflection minima and maxima seen in Fig. 3(a) are the result of the interaction between the a-Si microcavity and the electromagnetic resonance of the VO2 patch elements. When VO2 is in its semiconducting phase at temperatures below 45 °C these patch elements have less impact on the resonant freuquency, and the resonance is largely due to the microcavity. After the structural transition, and VO2 is in its metallic phase, there is a stronger interaction between the patch elements and the microcavity resulting in a red shift in the resonance frequency. Structures with electromagnetically resonant elements on transparent microcavities are further discussed in Ref. 21.

 

Fig. 3 (Color online) Reflected power and phase spectrum, A: Measured by FTIR compared to FEM simulation, B: Reflected phase spectrum simulated by FEM.

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The resonating reflection minima shift from 9.2 μm to 11.2 μm covering a significant portion of the atmospheric transmission window in the thermal IR band. This is the first demonstration of a tunable metamaterial in the thermal IR and covers a larger portion of the spectrum than previous VO2 metamaterial results in the near IR [11]. Although the bandwidth of the resonance increases at 70°C due to the increased extinction coefficient, the reflectarray remains in a resonating state in both VO2 phases. This may be seen by the reflection maxima that occur at 5 μm for both VO2 phases. There is also a bandwidth increase after the structural transition at 70 C. Previous VO2 metamaterial results in the THz band [10] which used a continuous layer of VO2 had a transition from a resonating to a spectrally flat state in which the device does not appear to be in a resonating mode.

Based on the HFSS simulations, the largest change in reflected phase occurs at the 20°C resonance at 9 μm where the reflected phase changes by more than 180 degrees. At 10.6 μm the reflected phase changes by 60 degrees in the HFSS simulation. This will be confirmed by the interferometer measurement.

4. Experimental demonstration of tunable phase

A schematic of the Twyman-green interferometer used to measure the reflected phase is shown in Fig. 4 .

 

Fig. 4 Twyman-Green interferometer using 10.6 μm CO2 laser used to measure reflected phase.

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Interferograms are produced using a 10.6 μm CO2 laser. The signal beam of the interferometer is incident on the thermochormic reflectarray sample that is oriented as shown in Fig. 1. A hot plate is used as the sample holder with a thermalcouple in contact with the wafer to measure the temperature. The detector array is a Spiricon camera used to take interferogram images. Figure 5 shows interferograms measured at 20°C and 70°C. The step between successive fringes is equivalent to a 180 degree relative phase difference. White lines in Fig. 5 highlight one of the interference fringes across the wafer. The step in the fringes indicated by the white line occurs when a fringe falls across the patterned region. The reflected phase of the reflectarray is measured by the size in fringes indicated by the white line.

 

Fig. 5 (Color online) Interferograms of thermochromic reflectarray at A: 20°C and B: 70°C. White lines added to emphasize fringe contrast. The patterned reflectarray region is highlighted by a blue line.

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By comparing the step in the white line to the distance between succesvie fringes (180 degrees) the reflected phase may be calculated. At 20°C, when the VO2 elements are in the monoclinic phase, the reflected phase of the reflectarray is nearly equal to the a-Si cavity and thus there is only a small step in the fringes across the patterned region. At 70°C, after the transition to the rutile phase, the reflected phase has shifted 60 degrees as evidenced by the step in the fringes across the elements. This is in agreement with the FEM prediction, and thus the ellipsometry measurement of the optical constants, the FTIR measurement of the spectral reflectance, and the interferometric measurement of the reflected phase are all in agreement. Figure 6 shows the measured reflected phase as a function of temperature.

 

Fig. 6 (Color online) Measured reflected phase as a function of temperature during heating and cooling. Data points from interferogram analysis with polynomial fit indicated by the broken line.

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The data in Fig. 6 was taken by analyzing the interferograms measured versus temperature while the sample was heated from 35 through 75 °C and then cooled through the same temperature range. From 65 though 45 °C, there is a linear decrease in the reflected phase corresponding to the exponential change in the resistivity of the VO2 elements which is seen in Fig. 2(a). Following the hysteresis in the electrical resistivity upon heating and cooling, there is hysteresis in the reflected phase.

5. Discussion

The change in both reflected phase and resistivity in the VO2 elements occurs between 45 and 65 °C for the films used in this article prepared by thermal oxidation. In pure single phase VO2 deposited by pulsed laser deposition as in Ref. 18 the transition is more abrupt occurring between 65 and 75 °C. The hysteresis is also more significant in pure single phase VO2 resulting in thermochromic transitions occurring over different temperature ranges for heating and cooling [18]. Lower transition temperature and wider thermal range with less hysteresis is seen in VO2 doped with about 1 at.% W [18], or can be caused by characteristics of the microsctructure such as small grains [22] or surface roughness and voids [23]. The optimal microstructure of VO2 for thermochromic metamaterials will be the subject of future work, but the current VO2 elements result in a linear change in reflected phase that may be easily controlled over a 20°C range. This is useful for beam-steering applications as the phase may be scanned continuously instead of being limited to binary states. The reflected phase may also be changed quickly by resistive heating in a thin film beneath the groundplane as in Ref. 10 or by optical heating [24].

6. Conclusion

Using thermochromic VO2 square-patch elements, the reflection minima was shown to be scanned spectrally from 9.2 to 11.2 μm by FTIR measurements. This was in agreement with finite-element HFSS simulations that used the optical constants of VO2 measured by IR ellipsometry. The same HFSS simulation calculated a 60 degree phase change at 10.6 μm, and this was confirmed by interferometer measurements. Interferometric measurements also showed a linear change in phase that occurred as the sample temperature changed from 45 through 65 °C.

Acknowledgements

This research was supported by grants from Northrop Grumman Space Technologies, and the Florida High Tech Corridor Council.

References and links

1. D. Shelton, J. Ginn, and G. Boreman, “Bandwidth variations in conformal infrared frequency selective surfaces,” IEEE Antennas Propag. International Symposium, 3976 (2007).

2. J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009). [CrossRef]  

3. B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005). [CrossRef]  

4. W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006). [CrossRef]   [PubMed]  

5. J. Ginn, B. Lail, J. Alda, and G. Boreman, “Planar infrared binary phase reflectarray,” Opt. Lett. 33(8), 779–781 (2008). [CrossRef]   [PubMed]  

6. J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007). [CrossRef]  

7. E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

8. S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005). [CrossRef]   [PubMed]  

9. D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003). [CrossRef]  

10. T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009). [CrossRef]   [PubMed]  

11. M. J. Dicken, K. Aydin, I. M. Pryce, L. A. Sweatlock, E. M. Boyd, S. Walavalkar, J. Ma, and H. A. Atwater, “Frequency tunable near-infrared metamaterials based on VO2 phase transition,” Opt. Express 17(20), 18330–18339 (2009), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-20-18330. [CrossRef]   [PubMed]  

12. F. J. Morin, “Oxides which show a metal-to-insulator transition at the neel temperature,” Phys. Rev. Lett. 3(1), 34–36 (1959). [CrossRef]  

13. P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006). [CrossRef]  

14. J. B. Goodenough, “The two components of crystallographic transition in VO2,” J. Solid State Chem. 3(4), 490–500 (1971). [CrossRef]  

15. A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004). [CrossRef]  

16. M. H. Lee and M. G. Kim, “RTA and stoichiometry effect on the thermochromism of VO2 thin films,” Thin Solid Films 286(1-2), 219–222 (1996). [CrossRef]  

17. F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004). [CrossRef]  

18. M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004). [CrossRef]  

19. F. C. Case, “Influence of ion beam parameters on the electrical and optical properties of ion-assisted reactively evaporated vanadium dioxide thin films,” J. Vac. Sci. Technol. A 5(4), 1762 (1987). [CrossRef]  

20. D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007). [CrossRef]  

21. B. A. Munk, Frequency Selective Surfaces: Theory and Design (Wiley, 2000), Chap. 9.

22. E. E. Chain, “Optical properties of vanadium dioxide and vanadium pentoxide thin films,” Appl. Opt. 30(19), 2782 (1991). [CrossRef]   [PubMed]  

23. F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005). [CrossRef]  

24. A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001). [CrossRef]   [PubMed]  

References

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  1. D. Shelton, J. Ginn, and G. Boreman, “Bandwidth variations in conformal infrared frequency selective surfaces,” IEEE Antennas Propag. International Symposium, 3976 (2007).
  2. J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
    [CrossRef]
  3. B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
    [CrossRef]
  4. W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
    [CrossRef] [PubMed]
  5. J. Ginn, B. Lail, J. Alda, and G. Boreman, “Planar infrared binary phase reflectarray,” Opt. Lett. 33(8), 779–781 (2008).
    [CrossRef] [PubMed]
  6. J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
    [CrossRef]
  7. E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).
  8. S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
    [CrossRef] [PubMed]
  9. D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
    [CrossRef]
  10. T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
    [CrossRef] [PubMed]
  11. M. J. Dicken, K. Aydin, I. M. Pryce, L. A. Sweatlock, E. M. Boyd, S. Walavalkar, J. Ma, and H. A. Atwater, “Frequency tunable near-infrared metamaterials based on VO2 phase transition,” Opt. Express 17(20), 18330–18339 (2009), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-20-18330 .
    [CrossRef] [PubMed]
  12. F. J. Morin, “Oxides which show a metal-to-insulator transition at the neel temperature,” Phys. Rev. Lett. 3(1), 34–36 (1959).
    [CrossRef]
  13. P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
    [CrossRef]
  14. J. B. Goodenough, “The two components of crystallographic transition in VO2,” J. Solid State Chem. 3(4), 490–500 (1971).
    [CrossRef]
  15. A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
    [CrossRef]
  16. M. H. Lee and M. G. Kim, “RTA and stoichiometry effect on the thermochromism of VO2 thin films,” Thin Solid Films 286(1-2), 219–222 (1996).
    [CrossRef]
  17. F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
    [CrossRef]
  18. M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
    [CrossRef]
  19. F. C. Case, “Influence of ion beam parameters on the electrical and optical properties of ion-assisted reactively evaporated vanadium dioxide thin films,” J. Vac. Sci. Technol. A 5(4), 1762 (1987).
    [CrossRef]
  20. D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
    [CrossRef]
  21. B. A. Munk, Frequency Selective Surfaces: Theory and Design (Wiley, 2000), Chap. 9.
  22. E. E. Chain, “Optical properties of vanadium dioxide and vanadium pentoxide thin films,” Appl. Opt. 30(19), 2782 (1991).
    [CrossRef] [PubMed]
  23. F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
    [CrossRef]
  24. A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
    [CrossRef] [PubMed]

2009

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

M. J. Dicken, K. Aydin, I. M. Pryce, L. A. Sweatlock, E. M. Boyd, S. Walavalkar, J. Ma, and H. A. Atwater, “Frequency tunable near-infrared metamaterials based on VO2 phase transition,” Opt. Express 17(20), 18330–18339 (2009), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-20-18330 .
[CrossRef] [PubMed]

2008

2007

J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
[CrossRef]

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

2006

P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
[CrossRef]

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

2005

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

2004

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

2003

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

2001

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

1996

M. H. Lee and M. G. Kim, “RTA and stoichiometry effect on the thermochromism of VO2 thin films,” Thin Solid Films 286(1-2), 219–222 (1996).
[CrossRef]

1991

1987

F. C. Case, “Influence of ion beam parameters on the electrical and optical properties of ion-assisted reactively evaporated vanadium dioxide thin films,” J. Vac. Sci. Technol. A 5(4), 1762 (1987).
[CrossRef]

1971

J. B. Goodenough, “The two components of crystallographic transition in VO2,” J. Solid State Chem. 3(4), 490–500 (1971).
[CrossRef]

1959

F. J. Morin, “Oxides which show a metal-to-insulator transition at the neel temperature,” Phys. Rev. Lett. 3(1), 34–36 (1959).
[CrossRef]

Alda, J.

Atwater, H. A.

Averitt, R. D.

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

Aydin, K.

Bartal, G.

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

Basov, D. N.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Boreman, G.

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

J. Ginn, B. Lail, J. Alda, and G. Boreman, “Planar infrared binary phase reflectarray,” Opt. Lett. 33(8), 779–781 (2008).
[CrossRef] [PubMed]

J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
[CrossRef]

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

Boreman, G. D.

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

Boyd, E. M.

Brueck, S. R. J.

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

Case, F. C.

F. C. Case, “Influence of ion beam parameters on the electrical and optical properties of ion-assisted reactively evaporated vanadium dioxide thin films,” J. Vac. Sci. Technol. A 5(4), 1762 (1987).
[CrossRef]

Cavalleri, A.

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Chae, B. G.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Chain, E. E.

Chaker, M.

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

Chong, H. H. W.

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

Cros, F.

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

Cubukcu, E.

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

Dekorsy, T.

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

Di Ventra, M.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Dicken, M. J.

Driscoll, T.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Fan, W.

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

Folks, W.

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

Forget, P.

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Gavarri, J. R.

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

Ginn, J.

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

J. Ginn, B. Lail, J. Alda, and G. Boreman, “Planar infrared binary phase reflectarray,” Opt. Lett. 33(8), 779–781 (2008).
[CrossRef] [PubMed]

Goodenough, J. B.

J. B. Goodenough, “The two components of crystallographic transition in VO2,” J. Solid State Chem. 3(4), 490–500 (1971).
[CrossRef]

Guinneton, F.

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

Haddad, E.

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

Highstrete, C.

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

Jokerst, N. M.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Kieffer, J. C.

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Kim, B. J.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Kim, H. T.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Kim, M. G.

M. H. Lee and M. G. Kim, “RTA and stoichiometry effect on the thermochromism of VO2 thin films,” Thin Solid Films 286(1-2), 219–222 (1996).
[CrossRef]

Kotter, D.

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

Krenz, P.

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

Kruzelecky, R. V.

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

Laffez, P.

P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
[CrossRef]

Lail, B.

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

J. Ginn, B. Lail, J. Alda, and G. Boreman, “Planar infrared binary phase reflectarray,” Opt. Lett. 33(8), 779–781 (2008).
[CrossRef] [PubMed]

J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
[CrossRef]

Lee, M.

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

Lee, M. H.

M. H. Lee and M. G. Kim, “RTA and stoichiometry effect on the thermochromism of VO2 thin films,” Thin Solid Films 286(1-2), 219–222 (1996).
[CrossRef]

Lee, Y. W.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Loo, R. Y.

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

Ma, J.

Malloy, K. J.

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

Monacelli, B.

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

Morin, F. J.

F. J. Morin, “Oxides which show a metal-to-insulator transition at the neel temperature,” Phys. Rev. Lett. 3(1), 34–36 (1959).
[CrossRef]

Munk, B.

J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
[CrossRef]

Munk, B. A.

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

Nikanpour, D.

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

Osgood, R. M.

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

Padilla, W. J.

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

Palit, S.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Panoiu, N. C.

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

Park, Y. S.

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

Pryce, I. M.

Pryor, J.

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

Ráksi, F.

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Reversat, L.

P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
[CrossRef]

Ruello, P.

P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
[CrossRef]

Sauques, L.

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

Schaffner, J. H.

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

Schoenlein, R. W.

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

Shelton, D.

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

Shelton, D. J.

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

Siders, C. W.

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Sievenpiper, D. F.

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

Smith, D. R.

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Soltani, M.

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

Song, H. J.

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

Squier, J. A.

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Sweatlock, L. A.

Tangonan, G.

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

Taylor, A. J.

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

Tharp, J.

J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
[CrossRef]

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

Tóth, C.

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Valmalette, J. C.

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

Walavalkar, S.

Zaghrioui, M.

P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
[CrossRef]

Zhang, S.

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

Zhang, X.

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

Zummo, G.

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

Appl. Opt.

Appl. Phys. Lett.

P. Laffez, M. Zaghrioui, L. Reversat, and P. Ruello, “Electron doped (Sm1-x,Cax)MnO3 perovskite manganite as potential infrared thermochromic swith,” Appl. Phys. Lett. 89(8), 081909 (2006).
[CrossRef]

IEEE Tran. Ann. Prop.

D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo, and G. Tangonan, “Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Tran. Ann. Prop. 51(10), 2713–2722 (2003).
[CrossRef]

IEEE Trans. Antenn. Propag.

J. Tharp, B. Lail, B. Munk, and G. Boreman, “Design and demonstration of an infrared meanderline phase retarder,” IEEE Trans. Antenn. Propag. 55(11), 2983–2988 (2007).
[CrossRef]

B. Monacelli, J. Pryor, B. A. Munk, D. Kotter, and G. Boreman, “Infrared frequency selective surface based on circuit-analog square loop design,” IEEE Trans. Antenn. Propag. 53(2), 745–752 (2005).
[CrossRef]

J. Appl. Phys.

J. Ginn, D. Shelton, P. Krenz, B. Lail, and G. Boreman, “Altering infrared metamaterial performance through metal resonance damping,” J. Appl. Phys. 105(7), 074304 (2009).
[CrossRef]

E. Cubukcu, S. Zhang, Y. S. Park, G. Bartal, and X. Zhang, “Split ring resonator for infrared detection of single molecular monolayers,” J. Appl. Phys. 95, 043113 (2009).

J. Phys. Chem. Solids

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Role of surface defects and microstructure in infrared optical properties of thermochomic VO2 materials,” J. Phys. Chem. Solids 66(1), 63–73 (2005).
[CrossRef]

J. Solid State Chem.

J. B. Goodenough, “The two components of crystallographic transition in VO2,” J. Solid State Chem. 3(4), 490–500 (1971).
[CrossRef]

J. Vac. Sci. Technol. A

M. Soltani, M. Chaker, E. Haddad, R. V. Kruzelecky, and D. Nikanpour, “Optical switching of vanadium dioxide thin films deposited by reactive pulsed laser deposition,” J. Vac. Sci. Technol. A 22(3), 859 (2004).
[CrossRef]

F. C. Case, “Influence of ion beam parameters on the electrical and optical properties of ion-assisted reactively evaporated vanadium dioxide thin films,” J. Vac. Sci. Technol. A 5(4), 1762 (1987).
[CrossRef]

J. Vac. Sci. Technol. B

D. J. Shelton, J. Tharp, G. Zummo, W. Folks, and G. D. Boreman, “Fabrication of periodic microsctructures on flexible polyimide membranes,” J. Vac. Sci. Technol. B 25(6), 1827 (2007).
[CrossRef]

Opt. Express

Opt. Lett.

Phys. Rev. B

A. Cavalleri, T. Dekorsy, H. H. W. Chong, J. C. Kieffer, and R. W. Schoenlein, “Evidence for a structurallydriven insulator-to-metal transition in VO2: A view from the ultrafest timescale,” Phys. Rev. B 70(16), 161102 (2004).
[CrossRef]

Phys. Rev. Lett.

S. Zhang, W. Fan, N. C. Panoiu, K. J. Malloy, R. M. Osgood, and S. R. J. Brueck, “Experimental demonstration of near-infrared negative-index metamaterials,” Phys. Rev. Lett. 95(13), 137404 (2005).
[CrossRef] [PubMed]

W. J. Padilla, A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt, “Dynamical electric and magnetic metamaterial response at terahertz frequencies,” Phys. Rev. Lett. 96(10), 107401 (2006).
[CrossRef] [PubMed]

F. J. Morin, “Oxides which show a metal-to-insulator transition at the neel temperature,” Phys. Rev. Lett. 3(1), 34–36 (1959).
[CrossRef]

A. Cavalleri, C. Tóth, C. W. Siders, J. A. Squier, F. Ráksi, P. Forget, and J. C. Kieffer, “Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition,” Phys. Rev. Lett. 87(23), 237401 (2001).
[CrossRef] [PubMed]

Science

T. Driscoll, H. T. Kim, B. G. Chae, B. J. Kim, Y. W. Lee, N. M. Jokerst, S. Palit, D. R. Smith, M. Di Ventra, and D. N. Basov, “Memory metamaterials,” Science 325(5947), 1518–1521 (2009).
[CrossRef] [PubMed]

Thin Solid Films

M. H. Lee and M. G. Kim, “RTA and stoichiometry effect on the thermochromism of VO2 thin films,” Thin Solid Films 286(1-2), 219–222 (1996).
[CrossRef]

F. Guinneton, L. Sauques, J. C. Valmalette, F. Cros, and J. R. Gavarri, “Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure,” Thin Solid Films 446(2), 287–295 (2004).
[CrossRef]

Other

B. A. Munk, Frequency Selective Surfaces: Theory and Design (Wiley, 2000), Chap. 9.

D. Shelton, J. Ginn, and G. Boreman, “Bandwidth variations in conformal infrared frequency selective surfaces,” IEEE Antennas Propag. International Symposium, 3976 (2007).

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Figures (6)

Fig. 1
Fig. 1

(Color online) Reflectarray metmaterial diagram, A: patterned stripe with 1.7 μm square-patch VO2 elements, B: reflectarray cross section.

Fig. 2
Fig. 2

(Color online) Measured material parameters for VO2, A: Resistivity as a function of temperature, B: IR optical properties (index of refraction n, extinction coefficient k) for VO2 measured by ellipsometry.

Fig. 3
Fig. 3

(Color online) Reflected power and phase spectrum, A: Measured by FTIR compared to FEM simulation, B: Reflected phase spectrum simulated by FEM.

Fig. 4
Fig. 4

Twyman-Green interferometer using 10.6 μm CO2 laser used to measure reflected phase.

Fig. 5
Fig. 5

(Color online) Interferograms of thermochromic reflectarray at A: 20°C and B: 70°C. White lines added to emphasize fringe contrast. The patterned reflectarray region is highlighted by a blue line.

Fig. 6
Fig. 6

(Color online) Measured reflected phase as a function of temperature during heating and cooling. Data points from interferogram analysis with polynomial fit indicated by the broken line.

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