Micro-photoluminescence excitation spectroscopy on asymmetric absorption line shapes of weakly localized excitons in a quantum well

Shun Maruyama; Toshiyuki Ihara; Hirotake Itoh; Masahiro Yoshita; Hidefumi Akiyama; Loren N. Pfeiffer; Ken W. West

doi:10.1016/j.ssc.2008.05.004

Micro-photoluminescence excitation spectroscopy on asymmetric absorption line shapes of weakly localized excitons in a quantum well

Shun Maruyama, Toshiyuki Ihara, Hirotake Itoh, Masahiro Yoshita, Hidefumi Akiyama, Loren N. Pfeiffer, Ken W. West

Research output: Contribution to journal › Article › peer-review

Abstract

Micro-photoluminescence (PL) and micro-PL excitation (PLE) spectra were measured systematically in a 5 nm GaAs/AlAs single quantum well (QW) to investigate the predicted effect of asymmetric exciton absorption line shapes having high-energy tails due to weak localization of exciton center-of-mass motion by interface roughness. We found a characteristic change in the asymmetric shapes as the QW-interface coverage by monolayer terraces varied. Via spectral fitting using a reported model, we quantitatively obtained a localization length varying between 4-15 nm, and verified the validity as well as limitation of this model.

Original language	English
Pages (from-to)	114-117
Number of pages	4
Journal	Solid State Communications
Volume	147
Issue number	3-4
DOIs	https://doi.org/10.1016/j.ssc.2008.05.004
Publication status	Published - 2008 Jul 1
Externally published	Yes

Keywords

A. Quantum wells
D. Exciton localization
D. Optical properties
E. Photoluminescence

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2008.05.004

Cite this

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title = "Micro-photoluminescence excitation spectroscopy on asymmetric absorption line shapes of weakly localized excitons in a quantum well",

abstract = "Micro-photoluminescence (PL) and micro-PL excitation (PLE) spectra were measured systematically in a 5 nm GaAs/AlAs single quantum well (QW) to investigate the predicted effect of asymmetric exciton absorption line shapes having high-energy tails due to weak localization of exciton center-of-mass motion by interface roughness. We found a characteristic change in the asymmetric shapes as the QW-interface coverage by monolayer terraces varied. Via spectral fitting using a reported model, we quantitatively obtained a localization length varying between 4-15 nm, and verified the validity as well as limitation of this model.",

keywords = "A. Quantum wells, D. Exciton localization, D. Optical properties, E. Photoluminescence",

author = "Shun Maruyama and Toshiyuki Ihara and Hirotake Itoh and Masahiro Yoshita and Hidefumi Akiyama and Pfeiffer, {Loren N.} and West, {Ken W.}",

year = "2008",

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doi = "10.1016/j.ssc.2008.05.004",

language = "English",

volume = "147",

pages = "114--117",

journal = "Solid State Communications",

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publisher = "Elsevier Limited",

number = "3-4",

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T1 - Micro-photoluminescence excitation spectroscopy on asymmetric absorption line shapes of weakly localized excitons in a quantum well

AU - Maruyama, Shun

AU - Ihara, Toshiyuki

AU - Itoh, Hirotake

AU - Yoshita, Masahiro

AU - Akiyama, Hidefumi

AU - Pfeiffer, Loren N.

AU - West, Ken W.

PY - 2008/7/1

Y1 - 2008/7/1

N2 - Micro-photoluminescence (PL) and micro-PL excitation (PLE) spectra were measured systematically in a 5 nm GaAs/AlAs single quantum well (QW) to investigate the predicted effect of asymmetric exciton absorption line shapes having high-energy tails due to weak localization of exciton center-of-mass motion by interface roughness. We found a characteristic change in the asymmetric shapes as the QW-interface coverage by monolayer terraces varied. Via spectral fitting using a reported model, we quantitatively obtained a localization length varying between 4-15 nm, and verified the validity as well as limitation of this model.

AB - Micro-photoluminescence (PL) and micro-PL excitation (PLE) spectra were measured systematically in a 5 nm GaAs/AlAs single quantum well (QW) to investigate the predicted effect of asymmetric exciton absorption line shapes having high-energy tails due to weak localization of exciton center-of-mass motion by interface roughness. We found a characteristic change in the asymmetric shapes as the QW-interface coverage by monolayer terraces varied. Via spectral fitting using a reported model, we quantitatively obtained a localization length varying between 4-15 nm, and verified the validity as well as limitation of this model.

KW - A. Quantum wells

KW - D. Exciton localization

KW - D. Optical properties

KW - E. Photoluminescence

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U2 - 10.1016/j.ssc.2008.05.004

DO - 10.1016/j.ssc.2008.05.004

M3 - Article

AN - SCOPUS:46549088201

SN - 0038-1098

VL - 147

SP - 114

EP - 117

JO - Solid State Communications

JF - Solid State Communications

IS - 3-4

ER -

Micro-photoluminescence excitation spectroscopy on asymmetric absorption line shapes of weakly localized excitons in a quantum well

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Keywords

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