---
_id: '4286'
abstract:
- lang: eng
  text: "Due to their many-particle character and their application in quantum cascade
    lasers, optical intersubband excitations in semiconductor quantum wells have become
    the focus of many recent publications [1,2]. In samples of high quality,\r\nintrinsic
    processes like electron-electron and electron-phonon many particle correlations
    determine the basic optical and transport properties such as lineshape and ultrafast
    dynamics. At the same time, intersubband excitations allow\r\nthe direct investigation
    of dynamical properties of an important model system of many particle physics
    - the two-dimensional electron gas. We here present a microscopic theory for the
    intersubband dynamics and absorption.\r\nThe calculation of absorption spectra
    of MQW systems is in principle composed of two parts: the determination of the
    polarization in a single quantum well within a density matrix approach as the
    source of electromagnetic radiation\r\n(Fig. 1a) and the calculation of the generated
    fields in the geometry of interest (Fig. 1b) within a Green's function approach
    [3,4]. We will here focus on the so-called single-pass geometry (cf. Fig. 1b,
    [5])."
author:
- first_name: Ines
  full_name: Waldmüller, Ines
  last_name: Waldmüller
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
- first_name: 'Andreas '
  full_name: 'Knorr, Andreas '
  last_name: Knorr
citation:
  ama: 'Waldmüller I, Förstner J, Knorr A. Self-consistent Projection Operator Theory
    of Intersubband Absorbance in Semiconductor Quantum Wells. In: Morawetz K, ed.
    <i>Nonequilibrium Physics at Short Time Scales</i>. Berlin, Heidelberg: Springer
    Berlin Heidelberg; 2004. doi:<a href="https://doi.org/10.1007/978-3-662-08990-3">10.1007/978-3-662-08990-3</a>'
  apa: 'Waldmüller, I., Förstner, J., &#38; Knorr, A. (2004). Self-consistent Projection
    Operator Theory of Intersubband Absorbance in Semiconductor Quantum Wells. In
    K. Morawetz (Ed.), <i>Nonequilibrium Physics at Short Time Scales</i>. Berlin,
    Heidelberg: Springer Berlin Heidelberg. <a href="https://doi.org/10.1007/978-3-662-08990-3">https://doi.org/10.1007/978-3-662-08990-3</a>'
  bibtex: '@inbook{Waldmüller_Förstner_Knorr_2004, place={Berlin, Heidelberg}, title={Self-consistent
    Projection Operator Theory of Intersubband Absorbance in Semiconductor Quantum
    Wells}, DOI={<a href="https://doi.org/10.1007/978-3-662-08990-3">10.1007/978-3-662-08990-3</a>},
    booktitle={Nonequilibrium Physics at Short Time Scales}, publisher={Springer Berlin
    Heidelberg}, author={Waldmüller, Ines and Förstner, Jens and Knorr, Andreas },
    editor={Morawetz, KlausEditor}, year={2004} }'
  chicago: 'Waldmüller, Ines, Jens Förstner, and Andreas  Knorr. “Self-Consistent
    Projection Operator Theory of Intersubband Absorbance in Semiconductor Quantum
    Wells.” In <i>Nonequilibrium Physics at Short Time Scales</i>, edited by Klaus
    Morawetz. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. <a href="https://doi.org/10.1007/978-3-662-08990-3">https://doi.org/10.1007/978-3-662-08990-3</a>.'
  ieee: 'I. Waldmüller, J. Förstner, and A. Knorr, “Self-consistent Projection Operator
    Theory of Intersubband Absorbance in Semiconductor Quantum Wells,” in <i>Nonequilibrium
    Physics at Short Time Scales</i>, K. Morawetz, Ed. Berlin, Heidelberg: Springer
    Berlin Heidelberg, 2004.'
  mla: Waldmüller, Ines, et al. “Self-Consistent Projection Operator Theory of Intersubband
    Absorbance in Semiconductor Quantum Wells.” <i>Nonequilibrium Physics at Short
    Time Scales</i>, edited by Klaus Morawetz, Springer Berlin Heidelberg, 2004, doi:<a
    href="https://doi.org/10.1007/978-3-662-08990-3">10.1007/978-3-662-08990-3</a>.
  short: 'I. Waldmüller, J. Förstner, A. Knorr, in: K. Morawetz (Ed.), Nonequilibrium
    Physics at Short Time Scales, Springer Berlin Heidelberg, Berlin, Heidelberg,
    2004.'
date_created: 2018-08-30T07:33:20Z
date_updated: 2022-01-06T07:00:47Z
ddc:
- '530'
doi: 10.1007/978-3-662-08990-3
editor:
- first_name: Klaus
  full_name: Morawetz, Klaus
  last_name: Morawetz
extern: '1'
file:
- access_level: closed
  content_type: application/pdf
  creator: hclaudia
  date_created: 2018-08-30T07:36:14Z
  date_updated: 2018-08-30T07:36:14Z
  file_id: '4287'
  file_name: 2004 Waldmüller,Förstner,Knorr_Self-consistent Projection Operator Theory
    of Intersubband Absorbance in Semiconductor Quantum Wells.pdf
  file_size: 307992
  relation: main_file
  success: 1
file_date_updated: 2018-08-30T07:36:14Z
has_accepted_license: '1'
keyword:
- tet_topic_qw
language:
- iso: eng
place: Berlin, Heidelberg
publication: Nonequilibrium Physics at Short Time Scales
publication_identifier:
  eisbn:
  - '9783662089903'
  isbn:
  - '9783642057458'
publication_status: published
publisher: Springer Berlin Heidelberg
status: public
title: Self-consistent Projection Operator Theory of Intersubband Absorbance in Semiconductor
  Quantum Wells
type: book_chapter
user_id: '55706'
year: '2004'
...