Open AccessFemtosecond spectral studies of electron spin injection and relaxation in AlGaAs / GaAs MQW
Author(s) -
Sun Feng-Wei,
Li Deng,
Shou Qian,
Luning Liu,
Jin Wen,
Tianshu Lai,
Lin Wang
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.3196
Subject(s) - relaxation (psychology) , electron , femtosecond , condensed matter physics , materials science , saturation (graph theory) , spin (aerodynamics) , atomic physics , absorption (acoustics) , physics , optics , laser , psychology , social psychology , mathematics , quantum mechanics , combinatorics , thermodynamics , composite material
The electron spin injection and relaxation in AlGaAs/GaAs multi quantum well(MQW) are studied with f emtosecond saturation absorption measurements. A electron spin relaxation time of 80±10ps is deduced. The relaxation mechanism is attributed to the randomizat ion of the local magnetic field arising from the spinorbit coupling.