Schematic of proposed system with its operating principle. (IMAGE)
Caption
a Designed structures with VO2, HfO2, Si multilayers for reversible manipulation in the VIS, IR, THz and MW regions. From top to bottom, the thickness range for these layers are VO2 (500 nm)/ HfO2 (depends on the requirement)/ Si (150 nm)/ VO2 (0–60 nm)/ HfO2 (0–100 nm)/ VO2 (0–20 nm); b Transformation of crystal and band structures during the phase transition of VO2; c The ideal spectrum of the proposed optical system ranging from VIS to MW regions, is drawn based on the measured spectra. The solid lines represent the spectra for VO2(M), and the dashed lines represent the spectra for VO2(R); It should be mentioned that the metallic VO2(R) induces the perfect absorption in IR, and the absorption wavelength can be dynamically modulated by structural parameters; d The comparison of covering bands, response time and energy consumption of different references. The spectral span is the ratio of the maximum and minimum wavelength of the dynamic control region
Credit
by Hang Wei, Jinxin Gu, Tao Zhao, Zhiyuan Yan, He-Xiu Xu, Shuliang Dou, Cheng-Wei Qiu, and Yao Li
Usage Restrictions
Credit must be given to the creator.
License
CC BY