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.
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Opto-Electronic Advances
ISSN: 2096-4579
CN: 51-1781/TN
Opto-Electronic Advances is the open-access journal providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and opto-electronics.
CN: 51-1781/TN
Opto-Electronic Advances is the open-access journal providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and opto-electronics.
Helicity-dependent THz emission induced by ultrafast spin photocurrent in nodal-line semimetal candidate Mg3Bi2
Author Affiliations
Correspondence: oscarwang2008@sina.com tjiang@nudt.edu.cn
First published at:Dec 24, 2020
Abstract
References
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Funds:
the National Natural Science Foundation of China (61975021), the Science and Technology Project of Jilin Province (20170414041GH), the Research Project of Jilin Provincial Education Department (JJKH20181090KJ)
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Tong M Y, Hu Y Z, Xie X N, Zhu X G, Wang Z Y et al. Helicity-dependent THz emission induced by ultrafast spin photocurrent in nod-al-line semimetal candidate Mg3Bi2. Opto-Electron Adv 3, 200023 (2020).
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