Ultrafast heating and cooling of electron plasmas in GaInAs/AlInAs quantum wells after intersubband excitation

Stephan Lutgen; Robert A. Kaindl; Michael Woerner; Andreas Hase; Harald Künzel

doi:10.1016/S0038-1098(98)00078-7

Ultrafast heating and cooling of electron plasmas in GaInAs/AlInAs quantum wells after intersubband excitation

Stephan Lutgen, Robert A. Kaindl, Michael Woerner, Andreas Hase, Harald Künzel

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

Abstract

Energy exchange between nonequilibrium carriers and a two-dimensional electron plasma and subsequent carrier cooling are studied in femtosecond pump-probe experiments, (n = 1) electrons excited to the (n = 2) conduction subband via the midinfrared intersubband transition undergo intersubband scattering and subsequently transfer a large amount of energy to unexcited (n = 1) electrons resulting in a hot Fermi distribution within 2 ps. The observed heating rate increases with the plasma density whereas the subsequent cooling proceeds within 40 ps by emission of optical phonons and is found to be density independent.

Original language	English (US)
Pages (from-to)	425-429
Number of pages	5
Journal	Solid State Communications
Volume	106
Issue number	7
DOIs	https://doi.org/10.1016/S0038-1098(98)00078-7
State	Published - 1998
Externally published	Yes

Keywords

A. quantum wells
A. semiconductors
D. electron-electron interactions
D. electron-phonon interactions
E. time-resolved optical spectroscopies

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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10.1016/S0038-1098(98)00078-7

Cite this

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title = "Ultrafast heating and cooling of electron plasmas in GaInAs/AlInAs quantum wells after intersubband excitation",

abstract = "Energy exchange between nonequilibrium carriers and a two-dimensional electron plasma and subsequent carrier cooling are studied in femtosecond pump-probe experiments, (n = 1) electrons excited to the (n = 2) conduction subband via the midinfrared intersubband transition undergo intersubband scattering and subsequently transfer a large amount of energy to unexcited (n = 1) electrons resulting in a hot Fermi distribution within 2 ps. The observed heating rate increases with the plasma density whereas the subsequent cooling proceeds within 40 ps by emission of optical phonons and is found to be density independent.",

keywords = "A. quantum wells, A. semiconductors, D. electron-electron interactions, D. electron-phonon interactions, E. time-resolved optical spectroscopies",

author = "Stephan Lutgen and Kaindl, {Robert A.} and Michael Woerner and Andreas Hase and Harald K{\"u}nzel",

note = "Funding Information: Acknowledgements-We gratefully acknowledges upport from the Deutsche Forschungsgemeinschaft( SFB 296) and from the European Commission through the ULTRAFAST network.",

year = "1998",

doi = "10.1016/S0038-1098(98)00078-7",

language = "English (US)",

volume = "106",

pages = "425--429",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

number = "7",

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TY - JOUR

T1 - Ultrafast heating and cooling of electron plasmas in GaInAs/AlInAs quantum wells after intersubband excitation

AU - Lutgen, Stephan

AU - Kaindl, Robert A.

AU - Woerner, Michael

AU - Hase, Andreas

AU - Künzel, Harald

N1 - Funding Information: Acknowledgements-We gratefully acknowledges upport from the Deutsche Forschungsgemeinschaft( SFB 296) and from the European Commission through the ULTRAFAST network.

PY - 1998

Y1 - 1998

N2 - Energy exchange between nonequilibrium carriers and a two-dimensional electron plasma and subsequent carrier cooling are studied in femtosecond pump-probe experiments, (n = 1) electrons excited to the (n = 2) conduction subband via the midinfrared intersubband transition undergo intersubband scattering and subsequently transfer a large amount of energy to unexcited (n = 1) electrons resulting in a hot Fermi distribution within 2 ps. The observed heating rate increases with the plasma density whereas the subsequent cooling proceeds within 40 ps by emission of optical phonons and is found to be density independent.

AB - Energy exchange between nonequilibrium carriers and a two-dimensional electron plasma and subsequent carrier cooling are studied in femtosecond pump-probe experiments, (n = 1) electrons excited to the (n = 2) conduction subband via the midinfrared intersubband transition undergo intersubband scattering and subsequently transfer a large amount of energy to unexcited (n = 1) electrons resulting in a hot Fermi distribution within 2 ps. The observed heating rate increases with the plasma density whereas the subsequent cooling proceeds within 40 ps by emission of optical phonons and is found to be density independent.

KW - A. quantum wells

KW - A. semiconductors

KW - D. electron-electron interactions

KW - D. electron-phonon interactions

KW - E. time-resolved optical spectroscopies

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U2 - 10.1016/S0038-1098(98)00078-7

DO - 10.1016/S0038-1098(98)00078-7

M3 - Article

AN - SCOPUS:0032065714

SN - 0038-1098

VL - 106

SP - 425

EP - 429

JO - Solid State Communications

JF - Solid State Communications

IS - 7

ER -

Ultrafast heating and cooling of electron plasmas in GaInAs/AlInAs quantum wells after intersubband excitation

Abstract

Keywords

ASJC Scopus subject areas

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