Physics

Light helicity detector based on 2D magnetic semiconductor CrI3

X. Cheng, Z. Cheng, et al.

Discover groundbreaking research on light helicity detectors using graphene-CrI3-graphene heterostructures. The team explored the influence of CrI3's magnetic state on optoelectronic properties, unveiling unique photocurrent behaviors that could revolutionize spin-optoelectronic devices.

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Abstract

This paper reports on light helicity detectors based on graphene-CrI3-graphene van der Waals heterostructures. The researchers investigated circularly polarized light-excited current and reflective magnetic circular dichroism (RMCD) under various magnetic fields in both monolayer and multilayer CrI3 devices. The devices exhibited helicity-selective photoresponse behavior determined by CrI3's magnetic state, along with abnormal negative photocurrents at higher bias. The findings reveal the interplay between CrI3's magnetic and optoelectronic properties, paving the way for spin-optoelectronic device development.

Publisher

Nature Communications

Published On

Nov 25, 2021

Authors

Xing Cheng, Zhixuan Cheng, Cong Wang, Minglai Li, Pingfan Gu, Shiqi Yang, Yanping Li, Kenji Watanabe, Takashi Taniguchi, Wei Ji, Lun Dai

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