Reconfigurable nonlocal metasurface based on phase change materials
Reconfigurable nonlocal metasurface based on phase change materials
复制标题
基于相变材料的可重构非局部超表面
DOI：
10.1117/12.2675688
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Yang G
中科院分区：
文献类型：
--
作者：
Yang G
非局部元曲面具有统一的几何排列，但对入射角度的响应不同，因此具有独特的图像处理能力。由于非晶态和晶态之间存在明显的折射率差异，相变材料有望成为亚表面可重构的功能构件。本文展示了一种基于无损相变材料Sb2Se3的新型可调非局部准表面。它演示了在单个设备上集成两种可按需切换的功能，即亮场成像和二阶空间差分成像。
Nonlocal metasurfaces, which have uniform geometric arrangements but respond to incident angles differently, are uniquely capable of processing images. Phase change materials are promising functional building blocks to make metasurfaces reconfigurable owing to the significant refractive index contrast between amorphous and crystalline states. This presentation shows a novel tunable nonlocal metasurface based on the lossless phase change material Sb2Se3. It demonstrates the integration of two on-demand switchable functions, bright field imaging and second-order spatial differential imaging, on a single device.