Quadrupolar photovoltaic effect in the terahertz range in a two-dimensional spin- 32 hole system

Autor:	Mohsen Farokhnezhad, W. A. Coish, Reza Asgari, Dimitrie Culcer
Rok vydání:	2023
Předmět:	Condensed Matter - Other Condensed Matter General Relativity and Quantum Cosmology Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) FOS: Physical sciences Physics::Optics Other Condensed Matter (cond-mat.other)
Zdroj:	Physical Review B. 107
ISSN:	2469-9969 2469-9950
DOI:	10.1103/physrevb.107.085405
Popis:	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. 6 pages, 4 figures + Supplement
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61973def5ea30548a6aa139932fa7483 https://doi.org/10.1103/physrevb.107.085405 Zobrazit plný text záznamu