Bidirectional residual current in monolayer graphene under few-cycle laser irradiation

Bidirectional residual current in monolayer graphene under few-cycle laser irradiation

By numerically solving the time-dependent Schrödinger equation and semiconductor Bloch equations, the light-induced residual current in monolayer graphene driven by a circularly polarized few-cycle laser is investigated. An evident current direction reversal is disclosed when the amplitude of the dr...

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Veröffentlicht in:Optics express 2022-10, Vol.30 (21), p.37863-37873
Hauptverfasser: Zhang, Xiaoxue, Wu, Erheng, Du, Henglei, Guo, Huicheng, Liu, Chengpu
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container_title Optics express
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creator Zhang, Xiaoxue
Wu, Erheng
Du, Henglei
Guo, Huicheng
Liu, Chengpu
description By numerically solving the time-dependent Schrödinger equation and semiconductor Bloch equations, the light-induced residual current in monolayer graphene driven by a circularly polarized few-cycle laser is investigated. An evident current direction reversal is disclosed when the amplitude of the driving electric field exceeds a certain threshold value, which is absent in recent investigation [ Nature 550 , 224 ( 2017 ) 10.1038/nature23900 ]. Here the internal physical mechanism for the current reversal is inter-optical-cycle interference under a suitable long laser wavelength. Moreover, the reversal-related laser field amplitude depends sensitively on the ratio of ponderomotive energy to photon energy.
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title Bidirectional residual current in monolayer graphene under few-cycle laser irradiation
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