Helicity-dependent THz emission induced by ultrafast spin photocurrent in nodal-line semimetal candidate Mg3Bi2
Journal Title: Opto-Electronic Advances - Year 2020, Vol 3, Issue 12
Abstract
Helicity-dependent ultrafast spin current generated by circularly polarized photons in topological materials holds the crux to many technological improvements, such as quantum communications, on-chip communication processing and storage. Here, we present the manipulation of helicity-dependent terahertz emission generated in a nodal line semimetal candidate Mg3Bi2 by using photon polarization states. The terahertz emission is mainly ascribed to the helicity-dependent photocurrent that is originated from circular photogalvanic effects, and the helicity-independent photocurrent that is attributed to linear photogalvanic effect. Our work will inspire more explorations into novel nodal line semimetals and open up new opportunities for developing ultrafast optoelectronics in the topological system.
Authors and Affiliations
Mingyu Tong, Yuze Hu, Xiangnan Xie, Xiegang Zhu, Zhenyu Wang*, Xiang'ai Cheng, Tian Jiang*
Keywords
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- EP ID EP693136
- DOI 10.29026/oea.2020.200023
- Views 75
- Downloads 0
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