Quadrupolar photovoltaic effect in the terahertz range in a two-dimensional spin-3/2 hole system

Mohsen Farokhnezhad; W. A. Coish; Reza Asgari; Dimitrie Culcer

doi:10.1103/PhysRevB.107.085405

Quadrupolar photovoltaic effect in the terahertz range in a two-dimensional spin-3/2 hole system

Mesoscale and Nanoscale Physics 2023-02-22 v1 Other Condensed Matter

Authors: Mohsen Farokhnezhad , W. A. Coish , Reza Asgari , Dimitrie Culcer

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Abstract

We identify a strong photovoltaic response due to the non-linear optical transition between heavy and light hole sub-bands enabled by T_d-symmetry in a quantum well, which we term the quadrupolar photovoltaic effect (QPE). The photovoltaic current exhibits a strong resonance in the vicinity of the heavy hole-light hole splitting, with a magnitude governed by the momentum relaxation time, which can reach nanoseconds in GaAs holes. Since the heavy hole-light hole splitting can be tuned from a few meV to nearly 100 meV the QPE could serve as the basis for a terahertz photo-detector. We discuss strategies for experimental observation and device applications.

Keywords

quadrupolar photovoltaic effect terahertz spin-3/2 hole system heavy hole light hole quantum well nonlinear optical transition

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@article{arxiv.2205.01720,
  title  = {Quadrupolar photovoltaic effect in the terahertz range in a two-dimensional spin-3/2 hole system},
  author = {Mohsen Farokhnezhad and W. A. Coish and Reza Asgari and Dimitrie Culcer},
  journal= {arXiv preprint arXiv:2205.01720},
  year   = {2023}
}

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6 pages, 4 figures + Supplement

Quadrupolar photovoltaic effect in the terahertz range in a two-dimensional spin-3/2 hole system

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