Femtosecond Carrier Dynamics in GaAs Far from Equilibrium
- 26 February 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 76 (9), 1545-1548
- https://doi.org/10.1103/physrevlett.76.1545
Abstract
The dynamics of optically generated carriers in GaAs is investigated measuring transmission changes with ultrafast time and high spectral resolution. A novel two-color 15 fs Ti:sapphire laser system allows the observation of the femtosecond kinetics of energetic carrier distributions at excitation densities as low as . For the first time, LO phonon emission of highly excited nonequilibrium electrons is directly monitored. The contribution of the hole distribution to the data and the influence of carrier-carrier scattering is studied.
Keywords
This publication has 23 references indexed in Scilit:
- Ultrafast relaxation of photoexcited electrons in undoped GaAs measured by absorption saturation of spin‐orbit‐split transitionsPhysica Status Solidi (b), 1995
- Ultrafast Coherent Generation of Hot Electrons Studied via Band-to-Acceptor Luminescence in GaAsPhysical Review Letters, 1994
- Near-threshold continuum structure and the dissociation energies of, HD, andPhysical Review A, 1993
- Nonthermalized distribution of electrons on picosecond time scale in GaAsPhysical Review Letters, 1992
- Absorption edge singularities in highly excited semiconductorsPhysical Review Letters, 1992
- Initial thermalization of photoexcited carriers in GaAs studied by femtosecond luminescence spectroscopyPhysical Review Letters, 1991
- Carrier-carrier scattering in GaAs: Quantitative measurements from hot (e,) luminescencePhysical Review B, 1989
- Hot-Electron Recombination at Neutral Acceptors in GaAs: A cw Probe of Femtosecond Intervalley ScatteringPhysical Review Letters, 1989
- Femtosecond absorption saturation studies of hot carriers in GaAs and AlGaAsIEEE Journal of Quantum Electronics, 1988
- Hot electron photoluminescence in GaAs crystalsSolid State Communications, 1981