Relaxation and dephasing of the intersubband transitions in n-type InAs∕AlSb multi quantum wells

Relaxation and dephasing of the intersubband transitions in n-type InAs∕AlSb multi quantum wells

Intersubband electron relaxation and dephasing has been studied in InAs∕AlSb multi quantum wells using time resolved femtosecond spectroscopy. The authors have measured a relaxation time T1 of 3ps at T=300K (and 4.6ps at T=10K) for a transition energy of 260meV, which is in good agreement with our c...

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Veröffentlicht in:Applied physics letters 2007-08, Vol.91 (7)
Hauptverfasser: Menzel, S., Zibik, E. A., Revin, D. G., Cockburn, J. W., Devenson, J., Teissier, R., Baranov, A. N.
Format: Artikel
Sprache:eng
Schlagworte:
Electronics
Engineering Sciences
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Zusammenfassung:Intersubband electron relaxation and dephasing has been studied in InAs∕AlSb multi quantum wells using time resolved femtosecond spectroscopy. The authors have measured a relaxation time T1 of 3ps at T=300K (and 4.6ps at T=10K) for a transition energy of 260meV, which is in good agreement with our calculations. A dephasing time T2 of ∼320fs for optically excited electrons in the second subband was measured which determines the homogeneous broadening (∼4.1meV) of the absorption line.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2769948