Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well

We observed an anomalous linear photogalvanic effect (ALPGE) in undoped InGaAs/AlGaAs multiple quantum well and studied its wavelength dependence in details. This effect is believed to originate from the optical momentum alignment effect and the inhomogeneity of light intensity. We find that the spo...

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Autores principales: Zhu, Laipan, Liu, Yu, Gao, Hansong, Qin, Xudong, Li, Yuan, Wu, Qing, Chen, Yonghai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2014
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167559/
https://www.ncbi.nlm.nih.gov/pubmed/25258612
http://dx.doi.org/10.1186/1556-276X-9-493
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author Zhu, Laipan
Liu, Yu
Gao, Hansong
Qin, Xudong
Li, Yuan
Wu, Qing
Chen, Yonghai
author_facet Zhu, Laipan
Liu, Yu
Gao, Hansong
Qin, Xudong
Li, Yuan
Wu, Qing
Chen, Yonghai
author_sort Zhu, Laipan
collection PubMed
description We observed an anomalous linear photogalvanic effect (ALPGE) in undoped InGaAs/AlGaAs multiple quantum well and studied its wavelength dependence in details. This effect is believed to originate from the optical momentum alignment effect and the inhomogeneity of light intensity. We find that the spot location with the maximum ALPGE current is wavelength independent. And the normalized ALPGE current decreasing at smaller wavelengths is attributed to the sharp decrease of the momentum and energy relaxation time. The electrical measurement of the spectra dependence of ALPGE is highly sensitive proving to be an effective method for detecting the momentum anisotropy of photoinduced carriers and band coupling.
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spelling pubmed-41675592014-09-25 Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well Zhu, Laipan Liu, Yu Gao, Hansong Qin, Xudong Li, Yuan Wu, Qing Chen, Yonghai Nanoscale Res Lett Nano Express We observed an anomalous linear photogalvanic effect (ALPGE) in undoped InGaAs/AlGaAs multiple quantum well and studied its wavelength dependence in details. This effect is believed to originate from the optical momentum alignment effect and the inhomogeneity of light intensity. We find that the spot location with the maximum ALPGE current is wavelength independent. And the normalized ALPGE current decreasing at smaller wavelengths is attributed to the sharp decrease of the momentum and energy relaxation time. The electrical measurement of the spectra dependence of ALPGE is highly sensitive proving to be an effective method for detecting the momentum anisotropy of photoinduced carriers and band coupling. Springer 2014-09-14 /pmc/articles/PMC4167559/ /pubmed/25258612 http://dx.doi.org/10.1186/1556-276X-9-493 Text en Copyright © 2014 Zhu et al.; licensee Springer. http://creativecommons.org/licenses/by/4.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Zhu, Laipan
Liu, Yu
Gao, Hansong
Qin, Xudong
Li, Yuan
Wu, Qing
Chen, Yonghai
Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
title Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
title_full Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
title_fullStr Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
title_full_unstemmed Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
title_short Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
title_sort observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped ingaas/algaas multiple quantum well
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167559/
https://www.ncbi.nlm.nih.gov/pubmed/25258612
http://dx.doi.org/10.1186/1556-276X-9-493
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