Hot-phonon bottleneck in the photoinjected plasma in GaN
- 14 April 2003
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 82 (15), 2455-2457
- https://doi.org/10.1063/1.1566467
Abstract
The evolution on the picosecond scale of the macroscopic (nonequilibrium thermodynamic) state of a highly excited photoinjected plasma in bulk GaN is analyzed. We present the equations of evolution for the quasitemperature (level of excitation) of the hot carriers and of the optical phonons. A hot-phonon temperature overshoot is evidenced, as well as a preferential production of phonons in excess of equilibrium in a reduced off-center region of the Brillouin zone. A comparative analysis of the influence of the length of the exciting laser pulse is also performed.Keywords
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