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arXiv · 2309.11339

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·Shuyun Zhou
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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 work demonstrates light-induced band engineering upon below-gap pumping, and provides insights for extending Floquet engineering to more quantum materials.

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Shaohua Zhou, Changhua Bao, Benshu Fan, Fei Wang, Haoyuan Zhong, Hongyun Zhang, Peizhe Tang, Wenhui Duan, Shuyun Zhou. 2023-09-20. Floquet engineering of black phosphorus upon below-gap pumping. https://doi.org/10.1103/physrevlett.131.116401

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