Collective excitations in InAs quantum well intersubband transitions

J. Li; C. Z. Ning

doi:10.1016/j.physe.2003.12.086

Collective excitations in InAs quantum well intersubband transitions

J. Li, C. Z. Ning

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Intersubband transitions in semiconductor quantum well are studied using a density matrix theory that goes beyond the Hartree-Fock approximation by including the full second order electron-electron scattering terms in the polarization equation for the first time. Even though the spectral features remain qualitatively similar to the results obtained with dephasing rate approximation, significant quantitative changes result from such a more detailed treatment of dephasing. More specifically, we show how the interplay of the two fundamental collective excitations, the Fermi-edge singularity and the intersubband plasmon, leads to significant changes in lineshape as the electron density varies.

Original language	English (US)
Pages (from-to)	628-631
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	22
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physe.2003.12.086
State	Published - Apr 2004
Externally published	Yes
Event	15th International Conference on ELectronic Propreties - Nara, Japan Duration: Jul 14 2003 → Jul 18 2003

Keywords

Carrier scattering
Fermi edge singularity
Intersubband plasmon
Intersubband transitions
Many-body effects

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.physe.2003.12.086

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title = "Collective excitations in InAs quantum well intersubband transitions",

abstract = "Intersubband transitions in semiconductor quantum well are studied using a density matrix theory that goes beyond the Hartree-Fock approximation by including the full second order electron-electron scattering terms in the polarization equation for the first time. Even though the spectral features remain qualitatively similar to the results obtained with dephasing rate approximation, significant quantitative changes result from such a more detailed treatment of dephasing. More specifically, we show how the interplay of the two fundamental collective excitations, the Fermi-edge singularity and the intersubband plasmon, leads to significant changes in lineshape as the electron density varies.",

keywords = "Carrier scattering, Fermi edge singularity, Intersubband plasmon, Intersubband transitions, Many-body effects",

author = "J. Li and Ning, {C. Z.}",

year = "2004",

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doi = "10.1016/j.physe.2003.12.086",

language = "English (US)",

volume = "22",

pages = "628--631",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

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TY - JOUR

T1 - Collective excitations in InAs quantum well intersubband transitions

AU - Li, J.

AU - Ning, C. Z.

PY - 2004/4

Y1 - 2004/4

N2 - Intersubband transitions in semiconductor quantum well are studied using a density matrix theory that goes beyond the Hartree-Fock approximation by including the full second order electron-electron scattering terms in the polarization equation for the first time. Even though the spectral features remain qualitatively similar to the results obtained with dephasing rate approximation, significant quantitative changes result from such a more detailed treatment of dephasing. More specifically, we show how the interplay of the two fundamental collective excitations, the Fermi-edge singularity and the intersubband plasmon, leads to significant changes in lineshape as the electron density varies.

AB - Intersubband transitions in semiconductor quantum well are studied using a density matrix theory that goes beyond the Hartree-Fock approximation by including the full second order electron-electron scattering terms in the polarization equation for the first time. Even though the spectral features remain qualitatively similar to the results obtained with dephasing rate approximation, significant quantitative changes result from such a more detailed treatment of dephasing. More specifically, we show how the interplay of the two fundamental collective excitations, the Fermi-edge singularity and the intersubband plasmon, leads to significant changes in lineshape as the electron density varies.

KW - Carrier scattering

KW - Fermi edge singularity

KW - Intersubband plasmon

KW - Intersubband transitions

KW - Many-body effects

UR - http://www.scopus.com/inward/record.url?scp=1842784465&partnerID=8YFLogxK

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U2 - 10.1016/j.physe.2003.12.086

DO - 10.1016/j.physe.2003.12.086

M3 - Conference article

AN - SCOPUS:1842784465

SN - 1386-9477

VL - 22

SP - 628

EP - 631

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-3

T2 - 15th International Conference on ELectronic Propreties

Y2 - 14 July 2003 through 18 July 2003

ER -

Collective excitations in InAs quantum well intersubband transitions

Abstract

Keywords

ASJC Scopus subject areas

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