Reconfigurable nonlocal metasurface based on phase change materials

Guoce Yang; Mengyun Wang; June Sang Lee; Nikolaos Farmakidis; Harish Bhaskaran

doi:10.1117/12.2675688

4 October 2023 Reconfigurable nonlocal metasurface based on phase change materials

Guoce Yang, Mengyun Wang, June Sang Lee, Nikolaos Farmakidis, Harish Bhaskaran

Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC126470Y (2023) https://doi.org/10.1117/12.2675688
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

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.

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Guoce Yang, Mengyun Wang, June Sang Lee, Nikolaos Farmakidis, and Harish Bhaskaran "Reconfigurable nonlocal metasurface based on phase change materials", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC126470Y (4 October 2023); https://doi.org/10.1117/12.2675688

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KEYWORDS

Switching

Crystals

Transmittance

Flat optics

Glasses

Image processing

Integration

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