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arXiv · 2412.16856

Phase-change metasurfaces for reconfigurable image processing

Tingting Liu·Jumin Qiu·Tianbao Yu·Qiegen Liu·Jie Li·Shuyuan Xiao
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Abstract

Optical metasurfaces have enabled high-speed, low-power image processing within a compact footprint. However, reconfigurable imaging in such flat devices remains a critical challenge for fully harnessing their potential in practical applications. Here, we propose and demonstrate phase-change metasurfaces capable of dynamically switching between edge detection and bright-field imaging in the visible spectrum. This reconfigurability is achieved through engineering angular dispersion at electric and magnetic Mie-type resonances. The customized metasurface exhibits an angle-dependent transmittance profile in the amorphous state of Sb$_{2}$S$_{3}$ meta-atoms for efficient isotropic edge detection, and an angle-independent profile in the crystalline state for uniform bright-field imaging. The nanostructured Sb$_{2}$S$_{3}$-based reconfigurable image processing metasurfaces hold significant potential for applications in computer vision for autonomous driving systems.

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Tingting Liu, Jumin Qiu, Tianbao Yu, Qiegen Liu, Jie Li, Shuyuan Xiao. 2024-12-22. Phase-change metasurfaces for reconfigurable image processing. https://doi.org/10.1063/5.0248307

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