Active near infrared linear polarizer based on VO2 phase transition

作者：Peng, Xiao-Yu^*; Wang, Bing; Teng, Jinghua; Kana, J. B. Kana; Zhang, Xinhai

来源：Journal of Applied Physics, 2013, 114(16): 163103.

DOI：10.1063/1.4827193

• PLASMON RESONANCE
• VANADIUM
• TRANSMISSION
• IR

We demonstrate via the numerical simulation the modulation of the transmission of visible and near-infrared light through a hybrid grating structure containing a gold metallic wire-grid grating patterned on a thermochromic vanadium dioxide (VO2) thin film. We find that the transmission through the subwavelength slits of this hybrid device is significantly modulated in the near-infrared region due to the phase transition of VO2 film from insulator to metal when the temperature increases from 30 degrees C to 85 degrees C. By optimizing the hybrid-grating architecture parameters, the best switching efficiency of our hybrid grating at 1.5 lm reaches to 40%, and extinction ratio is larger than 10(13). The capability of switching on/off and fine tuning of the thick hybrid grating parameters make our hybrid-grating structure a promising candidate of an active broadband linear polarizer with high switching efficiency and extinction ratio.

• 出版日期2013-10-28