Abstracto

A Review on Recent Progress in Circularly Polarized Light Photodetector

Xiaowen Hu*, Yifan Feng

Circularly Polarized Light (CPL) has irreplaceable advantages in optoelectronic fields such as magnetic recording, quantum computing and optical communications. Circularly polarized light is a good carrier of information because of its regularity along the direction of propagation. In order to fully exploit the functions of CPL in these fields, circularly polarized light photodetectors are necessary. Conventional CPL photodetectors require complex optics and can only indirectly detect circularly polarized light, which hinders device miniaturization and application promotion. Therefore, direct CPL photodetectors have received more attention in recent years. Up to now, CPL photodetectors have been significantly developed. In this paper, we review the recent progress of CPL photodetectors based on chiral materials and chiral hypersurfaces that can convert optical field chirality into directional photocurrents, and introduce the potential applications of CPL photodetector, and finally we discussed the challenges and opportunities that CPL photodetectors are expected to face in the future.

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