The room-temperature dephasing in InAs/GaAs self-assembled quantum dots is measured using two independent methods: spectal-hole burning and four-wave mixing. Dephasing times weakly dependent on the excitation density are found, with a low density value of 290+/-80 fs from spectal-hole burning and of 260+/-20 fs from four-wave mixing.
Bibliographical noteCopyright (1999) by the American Physical Society.
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