Electric-Driven Polarization Meta-Optics for Tunable Edge-Enhanced Images

Micromachines

卷:13

Kai Ou¹  Zhanshan Wang¹  Hengyi Wan¹  Xinbin Cheng¹  Zeyong Wei¹  Cheng Cheng¹  Hui Yang² 

[1] MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China;

[2] National Research Center for High-Efficiency Grinding, College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;

关键词: edge-enhanced imaging;    tunable metalens;    polarization control;   

DOI  :  10.3390/mi13040541

来源: DOAJ

【 摘 要 】

In this study, we demonstrate an electrically driven, polarization-controlled metadevice to achieve tunable edge-enhanced images. The metadevice was elaborately designed by integrating single-layer metalens with a liquid-crystal plate to control the incident polarization. By modulating electric-driven voltages applied on the liquid-crystal plate, the metalens can provide two polarization-dependent phase profiles (hyperbolic phase and focusing spiral phase). Therefore, the metalens can perform two-dimensional focusing and spatial differential operation on an incident optical field, allowing dynamic switching between the bright-field imaging and the edge-enhanced imaging. Capitalizing on the compactness and dynamic tuning of the proposed metadevice, our scheme carves a promising path to image processing and biomedical imaging technology.

【 授权许可】

Unknown