Active metasurfaces based on phase transition material vanadium dioxide
Active metasurfaces based on phase transition material vanadium dioxide
复制标题
基于相变材料二氧化钒的活性超表面
DOI:
10.1007/s40843-022-2151-4
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发表时间:
2022-08
期刊:
影响因子:
--
通讯作者:
Bo Peng
中科院分区:
文献类型:
--
作者:
Yue Li;Jianliang Xie;Longjiang Deng;Bo Peng
Dynamic properties play a vital role in modern optical devices, including light detection and ranging systems, display devices, and digital cameras. Active metasurfaces provide an attractive scheme for the miniaturization and integration of dynamic optical systems compared with traditional bulk optical devices. Phase transition materials are great candidates for the design of active metasurfaces due to their high contrast refractive index and simple control characteristics. Here, we present a tunable metalens and switchable image coding metasurface in the near-infrared region through the control of the phase transition of vanadium oxide. By adjusting the phase transition of vanadium oxide, the focal intensity of the metalens is changed, and a switching effect with an intensity contrast of ∼12 times is demonstrated. In addition, the switchable imaging of two different numbers has been achieved in two different phase states. This work provides potential opportunities to realize active metasurfaces for imaging and encryption systems.
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