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 conferencePaperpeer-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 languageEnglish (US)
Pages140-141
Number of pages2
StatePublished - 1997
Externally publishedYes
EventProceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS - Baltimore, MD, USA
Duration: May 18 1997May 23 1997

Conference

ConferenceProceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS
CityBaltimore, MD, USA
Period5/18/975/23/97

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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