| Autor: |
C. K. Choi, Gil-Han Park, Yia-Chung Chang, Y. H. Kwon, Jin-Joo Song, Jerzy S. Krasinski, Girish S. Setlur |
| Rok vydání: |
2001 |
| Předmět: |
|
| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.424723 |
| Popis: |
The non-equilibrium carrier dynamics in GaN epilayer for carrier densities ranging from 4 X 1017 to 1019 cm-3 at 10 K was studied by femtosecond pump-probe transmission spectroscopy. Spectral hole burning was initially peaked roughly at the excitation energy for an estimated carrier density of 4 X 1018 cm-3 and gradually redshifted during the excitation. Because of reduced carrier-carrier and carrier-phonon scattering, a very slow energy relaxation of the hot carriers at these densities were observed. We show that the hot carriers were strongly confined in a non-thermal distribution and they relaxed collectively to the band edge.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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