Photogalvanic Effect in 2D Dichalcogenides Under Double Illumination

Abstract

We study the photogalvanic effect caused by a simultaneous action of circular-polarized interband and linearly-polarized intraband illuminations. It is found that, in such conditions, the steady photocurrent appears. The effect originates from the valley-selective pumping by the circular light, the trigonal asymmetry of the valleys together with the even asymmetry of the linearly-polarized light, that produces a polar in-plane asymmetry of the electron and hole distribution functions, leading to the photocurrent. The approach is based on the solution of the classical kinetic equation for carriers with accounting for the quantum interband excitation.

arXiv comment5 pages, 2 figures

References in corpus (10)

• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• The Valley Hall Effect in MoS2 Transistors
• Valley filter and valley valve in graphene
• Electrical control of the valley Hall effect in bilayer MoS2 transistors
• High frequency electric field induced nonlinear effects in graphene (review)
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• Valley Hall Transport of Photon-Dressed Quasiparticles in 2D Dirac Semiconductors

Cited by in corpus (7)

• Valley Acoustoelectric Effect
• Photogalvanic transport in fluctuating Ising superconductors
• Nonlinear circular valley photogalvanic effect
• Coherent photogalvanic effect in fluctuating superconductors
• Electron diffusion induced valley Hall effect and nonlinear galvanodiffusive transport in hexagonal 2D Dirac monolayer materials
• Role of Coulomb interaction in the valley photogalvanic effect
• Renormalization of the valley Hall conductivity due to interparticle interaction