Abstract
The carrier spin relaxation of In0.8 Ga0.2As/AlAs/ AlAs0.56Sb0.44coupled double quantum wells is investigated by spin-dependent pump and probe reflectance measurements with a high time resolution of 200 fs. The observed fast spin relaxation time of 9 ps at room temperature indicates high potential for applications to high-speed optical devices. A negative temperature dependence of spin relaxation time is observed between 100 K and room temperature. The spin relaxation is found to be governed by the Bir-Aronov-Pikus process between 10 and 100 K and by the D'yakonov-Perel' and Elliott-Yafet processes between 100 K and room temperature.
Original language | English |
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Article number | 04CM05 |
Journal | Japanese journal of applied physics |
Volume | 52 |
Issue number | 4 PART 2 |
DOIs | |
Publication status | Published - 2013 Apr |
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)