Optically induced electric-field domains by bound-to-continuum transitions inn-type multiple quantum wells

Autor:	Amir Sa'ar, C. Schönbein, C. Mermelstein, Harald Schneider, Markus Walther, Robert Rehm
Rok vydání:	1998
Předmět:	Photocurrent Physics Continuum (measurement) Condensed matter physics Infrared Mean free path Multiple quantum Excited state Electric field Photodetector Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics
Zdroj:	Physical Review B. 57:R15096-R15099
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.57.r15096
Popis:	We report on the experimental evidence of electric-field domain formation induced by the intersubband photocurrent in $n$-type $\mathrm{GaAs}/{\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}$ multiple quantum wells. The domain structure manifests itself by a plateaulike regime in the voltage dependence of the total current under infrared illumination. Domain formation is caused by a negative differential field dependence of the photoexcited carrier mean free path. The domain structure does not exist in the dark since the increase of the thermally excited carrier density in the continuum overrides the decrease of the mean free path.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6bf6990b273f7d4acb31daf4ed5c4d29 https://doi.org/10.1103/physrevb.57.r15096 Zobrazit plný text záznamu