Femtosecond dynamics of coherent intersubband polarizations in quantum wells studied in mid-infrared four-wave-mixing experiments

M. Woerner; R. A. Kaindl; S. Lutgen; T. Elsaesser; A. Hase; H. Kuenzel

Femtosecond dynamics of coherent intersubband polarizations in quantum wells studied in mid-infrared four-wave-mixing experiments

M. Woerner, R. A. Kaindl, S. Lutgen, T. Elsaesser, A. Hase, H. Kuenzel

Research output: Contribution to conference › Paper › peer-review

Abstract

The third-order nonlinear intersubband (IS) polarization in a pure quasi-two dimensional electron plasma was studied using time resolved four wave mixing with femtosecond mid-infrared pulses resonant to the IS transition. The samples investigated were 50 GaInAs quantum wells (QW) of 6-nm width separated by 14-nm-thick AlInAs barriers. IS scattering with a time constant of 1 ps resulting from phonon absorption is far below the observed dephasing rates. At low lattice temperatures, electron-electron scattering is identified to be the dominant phase-breaking scattering mechanism for the coherent IS polarization.

Original language	English (US)
Pages	140-141
Number of pages	2
State	Published - 1997
Externally published	Yes
Event	Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS - Baltimore, MD, USA Duration: May 18 1997 → May 23 1997

Conference

Conference	Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS
City	Baltimore, MD, USA
Period	5/18/97 → 5/23/97

ASJC Scopus subject areas

General Physics and Astronomy

Cite this

Femtosecond dynamics of coherent intersubband polarizations in quantum wells studied in mid-infrared four-wave-mixing experiments. / Woerner, M.; Kaindl, R. A.; Lutgen, S. et al.
1997. 140-141 Paper presented at Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS, Baltimore, MD, USA.

Research output: Contribution to conference › Paper › peer-review

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title = "Femtosecond dynamics of coherent intersubband polarizations in quantum wells studied in mid-infrared four-wave-mixing experiments",

abstract = "The third-order nonlinear intersubband (IS) polarization in a pure quasi-two dimensional electron plasma was studied using time resolved four wave mixing with femtosecond mid-infrared pulses resonant to the IS transition. The samples investigated were 50 GaInAs quantum wells (QW) of 6-nm width separated by 14-nm-thick AlInAs barriers. IS scattering with a time constant of 1 ps resulting from phonon absorption is far below the observed dephasing rates. At low lattice temperatures, electron-electron scattering is identified to be the dominant phase-breaking scattering mechanism for the coherent IS polarization.",

author = "M. Woerner and Kaindl, {R. A.} and S. Lutgen and T. Elsaesser and A. Hase and H. Kuenzel",

year = "1997",

language = "English (US)",

pages = "140--141",

note = "Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS ; Conference date: 18-05-1997 Through 23-05-1997",

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T1 - Femtosecond dynamics of coherent intersubband polarizations in quantum wells studied in mid-infrared four-wave-mixing experiments

AU - Woerner, M.

AU - Kaindl, R. A.

AU - Lutgen, S.

AU - Elsaesser, T.

AU - Hase, A.

AU - Kuenzel, H.

PY - 1997

Y1 - 1997

N2 - The third-order nonlinear intersubband (IS) polarization in a pure quasi-two dimensional electron plasma was studied using time resolved four wave mixing with femtosecond mid-infrared pulses resonant to the IS transition. The samples investigated were 50 GaInAs quantum wells (QW) of 6-nm width separated by 14-nm-thick AlInAs barriers. IS scattering with a time constant of 1 ps resulting from phonon absorption is far below the observed dephasing rates. At low lattice temperatures, electron-electron scattering is identified to be the dominant phase-breaking scattering mechanism for the coherent IS polarization.

AB - The third-order nonlinear intersubband (IS) polarization in a pure quasi-two dimensional electron plasma was studied using time resolved four wave mixing with femtosecond mid-infrared pulses resonant to the IS transition. The samples investigated were 50 GaInAs quantum wells (QW) of 6-nm width separated by 14-nm-thick AlInAs barriers. IS scattering with a time constant of 1 ps resulting from phonon absorption is far below the observed dephasing rates. At low lattice temperatures, electron-electron scattering is identified to be the dominant phase-breaking scattering mechanism for the coherent IS polarization.

UR - http://www.scopus.com/inward/record.url?scp=0030698615&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030698615&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0030698615

SP - 140

EP - 141

T2 - Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS

Y2 - 18 May 1997 through 23 May 1997

ER -

Femtosecond dynamics of coherent intersubband polarizations in quantum wells studied in mid-infrared four-wave-mixing experiments

Abstract

Conference

ASJC Scopus subject areas

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