Ultrafast pulse generation via magnetic topological insulator MnBi2Te4 nanosheets

Haiqin Deng; Qiang Yu; Zixin Yang; Jian Wu; Pu Zhou

doi:10.1117/12.3005487

18 December 2023 Ultrafast pulse generation via magnetic topological insulator MnBi₂Te₄ nanosheets

Haiqin Deng, Qiang Yu, Zixin Yang, Jian Wu, Pu Zhou

Proceedings Volume 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration; 129590M (2023) https://doi.org/10.1117/12.3005487
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Recently, 2D layered MnBi₂Te₄ has been a promising candidate for discovering the exotic topological quantum phenomena for the coexisting topology and magnetism. In particular, the layered structure of MnBi₂Te₄ with a small bandgap possesses excellent ultrafast nonlinear response and broadband saturable absorption, which indicates that they can be applied in the field of ultrafast photonics. Despite tremendous research on magnetism and topology, the nonlinear optical properties of MnBi₂Te₄ have been underexplored. Herein, we have successfully synthesized the high-quality MnBi₂Te₄ by the self-flux method. By using MnBi₂Te₄ nanosheets as a saturable absorber (SA), a passive mode-locking erbium-doped fiber (EDF) laser centered at 1560 nm was obtained with a pulse duration of 331 fs. This work suggests that magnetic topological insulators possess great potential for ultrafast photonics.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haiqin Deng, Qiang Yu, Zixin Yang, Jian Wu, and Pu Zhou "Ultrafast pulse generation via magnetic topological insulator MnBi₂Te₄ nanosheets", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 129590M (18 December 2023); https://doi.org/10.1117/12.3005487

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