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Picosecond spectroscopic study of modulation doped gallium arsenide-aluminum gallium arsenide quantum wells

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Date Issued:
1991
Summary:
CW photoluminescence and picosecond excitation correlation spectroscopy techniques were utilized to characterize two dimensional carriers modulation doped in GaAs-Al0.3Ga0.7As multiple quantum wells. Three characteristic transitions have been confirmed. Temperature variation measurements showed a strong carrier-phonon coupling in the samples, which is the main mechanism responsible for the fast carrier relaxation observed. In the time resolved experiments, it was found that the carrier relaxation slowed down as the excitation intensity increased, which we attribute to the buildup of non-equilibrium phonons rather than the dynamic screening effect. A theoretical calculation based upon hot phonon effect is presented.
Title: Picosecond spectroscopic study of modulation doped gallium arsenide-aluminum gallium arsenide quantum wells.
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Name(s): Xu, Xumou
Florida Atlantic University, Degree Grantor
Liu, Da Wei, Thesis Advisor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: monographic
Date Issued: 1991
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 101 p.
Language(s): English
Summary: CW photoluminescence and picosecond excitation correlation spectroscopy techniques were utilized to characterize two dimensional carriers modulation doped in GaAs-Al0.3Ga0.7As multiple quantum wells. Three characteristic transitions have been confirmed. Temperature variation measurements showed a strong carrier-phonon coupling in the samples, which is the main mechanism responsible for the fast carrier relaxation observed. In the time resolved experiments, it was found that the carrier relaxation slowed down as the excitation intensity increased, which we attribute to the buildup of non-equilibrium phonons rather than the dynamic screening effect. A theoretical calculation based upon hot phonon effect is presented.
Identifier: 14754 (digitool), FADT14754 (IID), fau:11545 (fedora)
Note(s): Thesis (M.S.)--Florida Atlantic University, 1991.
Subject(s): Modulation spectroscopy
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/14754
Sublocation: Digital Library
Use and Reproduction: Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
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Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.