Floquet engineering of black phosphorus upon below-gap pumping

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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Cited by in corpus (6)

• Manipulating the symmetry of photon-dressed electronic states
• Time-domain study of coupled collective excitations in quantum materials
• Light-induced ultrafast glide-mirror symmetry breaking in black phosphorus
• High harmonic generation light source with polarization selectivity and sub-100-$\mu$m beam size for time- and angle-resolved photoemission spectroscopy
• Floquet-Volkov interference in a semiconductor
• Light-field dressing of transient photo-excited states above $E_F$