Time-resolved study of intervalence band thermalization in a GaAs quantum well | Zendy

A. M. T. Kim | Zendy; S. Hunsche | Zendy; T. Dekorsy | Zendy; H. Kurz | Zendy; K. Köhler | Zendy

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Time-resolved study of intervalence band thermalization in a GaAs quantum well

Author(s) -

A. M. T. Kim,

S. Hunsche,

T. Dekorsy,

H. Kurz,

K. Köhler

Publication year - 1996

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.116367

Subject(s) - thermalisation , femtosecond , excited state , scattering , phonon , atomic physics , absorption (acoustics) , condensed matter physics , band gap , materials science , physics , molecular physics , laser , optics

The thermalization of optically excited cold holes in a GaAs quantum well is investigated by femtosecond two-color pump-probe measurements. Clear evidence is found for scattering from heavy-holes into the lowest light-hole band due to LO-phonon absorption. We obtain firm data on scattering times which depend strongly on lattice temperature. They vary from 230 fs at room temperature to 900 fs at T equal 05 K. The experimental data are well reproduced by numerical calculation

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