Femtosecond Orientational Relaxation of Photoexcited Carriers in GaAs
- 23 July 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 53 (4) , 384-387
- https://doi.org/10.1103/physrevlett.53.384
Abstract
The anisotropy of optical absorption saturation by intense linearly polarized light pulses is measured with subpicosecond resolution in GaAs at 77 K, at a photon energy slightly above the band gap. For an electron-hole pair density of about 6× , the momentum orientational relaxation time is determined to be 190 fs, most likely due to carrier-carrier scattering.
Keywords
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