Nonlinear Optical Properties of the Topological Material Bi2Se3 Family for the Application of an Ultrafast Pulse Laser Based on the Occupied and Unoccupied Band Structures

Yujiu Jiang; Xiaowei Xing; Peng Zhu; Kejian Wang; Zhiyang Zhang; Qi Liu; Zhiwei Wang; Wenjun Liu; Jinjian Zhou; Junfeng Han

doi:10.1021/acs.jpclett.4c02600

Nonlinear Optical Properties of the Topological Material Bi₂Se₃ Family for the Application of an Ultrafast Pulse Laser Based on the Occupied and Unoccupied Band Structures

J Phys Chem Lett. 2024 Nov 7:11419-11427. doi: 10.1021/acs.jpclett.4c02600. Online ahead of print.

Authors

Yujiu Jiang^{1

2

3}, Xiaowei Xing^{4

5}, Peng Zhu^{1

2

3}, Kejian Wang^{5

6}, Zhiyang Zhang⁴, Qi Liu^{4

5}, Zhiwei Wang^{1

2

3}, Wenjun Liu^{4

7}, Jinjian Zhou^{1

2

3}, Junfeng Han^{1

2

3}

Affiliations

¹ Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, China.
² International Center for Quantum Materials, Beijing Institute of Technology, Zhuhai 519000, China.
³ Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, China.
⁴ State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.
⁵ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
⁶ School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China.
⁷ Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071000, China.

PMID: 39508789
DOI: 10.1021/acs.jpclett.4c02600

Abstract

The Bi₂Se₃ family can exhibit many intriguing topological insulator properties, including a narrow bandgap and strong surface states, which show excellent nonlinear optical properties. Thinning bulk Bi₂Se₃ family materials to create a low-cost photoelectric modulation device and explaining the mechanisms of nonlinear optical differences in different types of materials remain challenges. Based on liquid-phase exfoliation technology and tapered fiber, this work prepared optoelectronic modulation devices for various samples within the Bi₂Se₃ family, quantitatively compared their nonlinear optical properties, and analyzed the sources of differentiation using the occupied and unoccupied multiband structure theory. The results correspond well to the phenomena observed in the ultrafast laser, which will provide strong support for the design of higher performance photoelectric devices based on topological insulators.