Floquet Engineering of Black Phosphorus upon Below-Gap Pumping

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Floquet Engineering of Black Phosphorus upon Below-Gap Pumping

Shaohua Zhou, Changhua Bao, Benshu Fan, Fei Wang, Haoyuan Zhong, Hongyun Zhang, Peizhe Tang, Wenhui Duan, and Shuyun Zhou

Phys. Rev. Lett. 131, 116401 – Published 13 September 2023

Abstract

Time-periodic light field can dress the electronic states and lead to light-induced emergent properties in quantum materials. While below-gap pumping is regarded favorable for Floquet engineering, so far direct experimental evidence of momentum-resolved band renormalization still remains missing. Here, we report experimental evidence of light-induced band renormalization in black phosphorus by pumping at photon energy of 160 meV, which is far below the band gap, and the distinction between below-gap pumping and near-resonance pumping is revealed. Our Letter demonstrates light-induced band engineering upon below-gap pumping, and provides insights for extending Floquet engineering to more quantum materials.

Received 11 May 2023
Revised 9 July 2023
Accepted 16 August 2023

DOI:https://doi.org/10.1103/PhysRevLett.131.116401

Physics Subject Headings (PhySH)

Electronic structure

Floquet systems

Time & angle resolved photoemission spectroscopy

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Shaohua Zhou ^1,*, Changhua Bao ^1,*, Benshu Fan ^1,*, Fei Wang¹, Haoyuan Zhong¹, Hongyun Zhang¹, Peizhe Tang ^2,3,†, Wenhui Duan ^1,4,5, and Shuyun Zhou ^1,4,‡

¹State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China
²School of Materials Science and Engineering, Beihang University, Beijing 100191, China
³Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, 22761 Hamburg, Germany
⁴Frontier Science Center for Quantum Information, Beijing 100084, China
⁵Institute for Advanced Study, Tsinghua University, Beijing 100084, China

^*These authors contributed equally to this work.
^†Corresponding author: peizhet@buaa.edu.cn
^‡Corresponding author: syzhou@mail.tsinghua.edu.cn

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Issue

Vol. 131, Iss. 11 — 15 September 2023

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