Ultrafast excitation-induced dephasing of homogeneously broadened intersubband resonances

R. A. Kaindl, K. Reimann, M. Woerner, T. Elsaesser, R. Hey, K. H. Ploog

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Summary form only given. Optical intersubband (IS) transitions in low-dimensional semiconductors are strongly affected by carrier interactions on ultrafast timescales. Coherent IS polarizations provide particularly sensitive probes of these fundamental interactions and, moreover, influence the characteristics of novel devices such as the quantum cascade laser. Most studies have investigated the energy position and inhomogeneous broadening of IS transitions? In contrast, homogeneous broadening is much less understood. Nonlinear optical techniques provide the key to characterize these irreversible dephasing processes. Here, we carry out time-integrated and-for the first time-time-resolved four-wave-mixing (FWM) in the midinfrared to investigate IS dephasing in n-type GaAs quantum wells with negligible disorder, for different electron densities and excitation intensities.

Original languageEnglish (US)
Title of host publicationTechnical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages247-248
Number of pages2
ISBN (Electronic)155752663X, 9781557526632
DOIs
StatePublished - 2001
Externally publishedYes
EventQuantum Electronics and Laser Science Conference, QELS 2001 - Baltimore, United States
Duration: May 6 2001May 11 2001

Publication series

NameTechnical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001

Conference

ConferenceQuantum Electronics and Laser Science Conference, QELS 2001
CountryUnited States
CityBaltimore
Period5/6/015/11/01

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiation

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