TY - GEN
T1 - Ultrafast excitation-induced dephasing of homogeneously broadened intersubband resonances
AU - Kaindl, R. A.
AU - Reimann, K.
AU - Woerner, M.
AU - Elsaesser, T.
AU - Hey, R.
AU - Ploog, K. H.
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
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U2 - 10.1109/QELS.2001.962200
DO - 10.1109/QELS.2001.962200
M3 - Conference contribution
AN - SCOPUS:84958260048
T3 - Technical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001
SP - 247
EP - 248
BT - Technical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - Quantum Electronics and Laser Science Conference, QELS 2001
Y2 - 6 May 2001 through 11 May 2001
ER -