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- Kim, Dai-Sik
- Nano Optics Group
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PHONON TEMPERATURE OVERSHOOT IN GAAS EXCITED BY SUBPICOSECOND LASER-PULSES
- Issued Date
- 1990-02
- Citation
- PHYSICAL REVIEW LETTERS, v.64, no.8, pp.946 - 949
- Abstract
- Hot electrons and phonons excited in GaAs by subpicosecond laser pulses have been studied by inelastic light scattering for photoexcited electron densities varying between 1017 and 1019cm−3. Transient overshoot of longitudinal-optical (LO) phonon temperature above the electron temperature has been observed. This is explained by the fast production of zone-center LO phonons by hot electrons combined with slower reabsorption of the emitted phonons due to rapid cooling of Γ valley electrons by intervalley scattering.
- Publisher
- AMER PHYSICAL SOC
- ISSN
- 0031-9007
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