Hot-phonon effects and interband relaxation processes in photoexcited GaAs quantum wells

R. P. Joshi, D. K. Ferry

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

We present a theoretical study of the thermalization process of laser-excited, electron-hole plasmas in quantum wells. In particular, the long-time behavior of the light holes is investigated to determine their effect and the role played by the nonequilibrium phonons on the relaxation dynamics. We find that phonon reabsorption by the light holes can result in a significant heating of this population. The consequent retardation in the cooling is further augmented by the bottleneck effect arising out of energy-threshold limitations for the inter- and intraband phonon-emission processes. It is possible to obtain light-hole temperatures exceeding those of the electrons for some values of the lattice temperature and well width. Our results compare favorably with recent experimental observations.

Original languageEnglish (US)
Pages (from-to)1180-1187
Number of pages8
JournalPhysical Review B
Volume39
Issue number2
DOIs
StatePublished - 1989

Fingerprint

Relaxation processes
Semiconductor quantum wells
quantum wells
Electrons
Phonons
Cooling
Plasmas
Heating
Temperature
Lasers
phonons
cooling
heating
thresholds
temperature
gallium arsenide
lasers
electrons
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Hot-phonon effects and interband relaxation processes in photoexcited GaAs quantum wells. / Joshi, R. P.; Ferry, D. K.

In: Physical Review B, Vol. 39, No. 2, 1989, p. 1180-1187.

Research output: Contribution to journalArticle

Joshi, R. P. ; Ferry, D. K. / Hot-phonon effects and interband relaxation processes in photoexcited GaAs quantum wells. In: Physical Review B. 1989 ; Vol. 39, No. 2. pp. 1180-1187.
@article{ff6b203a174a4aa184a8e16952378e5b,
title = "Hot-phonon effects and interband relaxation processes in photoexcited GaAs quantum wells",
abstract = "We present a theoretical study of the thermalization process of laser-excited, electron-hole plasmas in quantum wells. In particular, the long-time behavior of the light holes is investigated to determine their effect and the role played by the nonequilibrium phonons on the relaxation dynamics. We find that phonon reabsorption by the light holes can result in a significant heating of this population. The consequent retardation in the cooling is further augmented by the bottleneck effect arising out of energy-threshold limitations for the inter- and intraband phonon-emission processes. It is possible to obtain light-hole temperatures exceeding those of the electrons for some values of the lattice temperature and well width. Our results compare favorably with recent experimental observations.",
author = "Joshi, {R. P.} and Ferry, {D. K.}",
year = "1989",
doi = "10.1103/PhysRevB.39.1180",
language = "English (US)",
volume = "39",
pages = "1180--1187",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Hot-phonon effects and interband relaxation processes in photoexcited GaAs quantum wells

AU - Joshi, R. P.

AU - Ferry, D. K.

PY - 1989

Y1 - 1989

N2 - We present a theoretical study of the thermalization process of laser-excited, electron-hole plasmas in quantum wells. In particular, the long-time behavior of the light holes is investigated to determine their effect and the role played by the nonequilibrium phonons on the relaxation dynamics. We find that phonon reabsorption by the light holes can result in a significant heating of this population. The consequent retardation in the cooling is further augmented by the bottleneck effect arising out of energy-threshold limitations for the inter- and intraband phonon-emission processes. It is possible to obtain light-hole temperatures exceeding those of the electrons for some values of the lattice temperature and well width. Our results compare favorably with recent experimental observations.

AB - We present a theoretical study of the thermalization process of laser-excited, electron-hole plasmas in quantum wells. In particular, the long-time behavior of the light holes is investigated to determine their effect and the role played by the nonequilibrium phonons on the relaxation dynamics. We find that phonon reabsorption by the light holes can result in a significant heating of this population. The consequent retardation in the cooling is further augmented by the bottleneck effect arising out of energy-threshold limitations for the inter- and intraband phonon-emission processes. It is possible to obtain light-hole temperatures exceeding those of the electrons for some values of the lattice temperature and well width. Our results compare favorably with recent experimental observations.

UR - http://www.scopus.com/inward/record.url?scp=0000070011&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000070011&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.39.1180

DO - 10.1103/PhysRevB.39.1180

M3 - Article

VL - 39

SP - 1180

EP - 1187

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 2

ER -