Rashba spin-orbit coupling enhanced two-photon absorption and its polarization dependence in monolayer black phosphorus | Zendy

Xueqin Luo | Zendy; Xiaobo Feng | Zendy; Yingkai Liu | Zendy; Jie Guo | Zendy

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Rashba spin-orbit coupling enhanced two-photon absorption and its polarization dependence in monolayer black phosphorus

Author(s) -

Xueqin Luo,

Xiaobo Feng,

Yingkai Liu,

Jie Guo

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.388936

Subject(s) - polarization (electrochemistry) , anisotropy , electric field , photon , photon polarization , zigzag , monolayer , ray , optics , spin–orbit interaction , condensed matter physics , physics , materials science , atomic physics , chemistry , nanotechnology , geometry , mathematics , quantum mechanics

We investigate theoretically the impact of Rashba spin-orbit coupling (RSOC) effect to two-photon absorption (TPA) and its dependence on the polarization direction of the incident light in monolayer black phosphorus (BP) starting from an anisotropic two band k·p model. It is found that the TPA is enhanced several times by RSOC effect which is tuned by the external electric field. And the TPA response shows highly anisotropic, changing periodically with the polarization direction of incident linearly polarized light as the function of cos 4 θ approximatively. The TPA coefficient reaches its maximum when the polarization direction is aligned along the armchair direction (x-direction), while falls into its minimum along the zigzag direction (y-direction).

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