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Proceedings Paper

Excitonic optical Stark effect in GaN
Author(s): Chan-Kyung Choi; Yia-Chung Chang; Jack Biu Lam; Sang-Kee Shee; Jerzy S. Krasinski; Jin-Joo Song
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Paper Abstract

We report experimental and theoretical studies of the excitonic optical Stark effect in GaN photoexcited below the excitonic resonances with various polarization configurations and pump detunings, using nondegenerate pump-probe spectroscopy at 10 K. We observed that the Stark effect in GaN is strongly dependent on pump and probe relative linear polarizations. We found that this dependence results from the small spin-orbit splitting in GaN and a mixing of A and B valence bands induced by a linearly polarized pump. Using two different circular polarization configurations, we also observed splitting of degenerate excitons because of different optical Stark shifts. Our experimental results are explained by a simple theoretical model.

Paper Details

Date Published: 11 June 2002
PDF: 9 pages
Proc. SPIE 4643, Ultrafast Phenomena in Semiconductors VI, (11 June 2002); doi: 10.1117/12.470414
Show Author Affiliations
Chan-Kyung Choi, Oklahoma State Univ. (United States)
Yia-Chung Chang, Univ. of Illinois/Urbana-Champaign (United States)
Jack Biu Lam, Oklahoma State Univ. (United States)
Sang-Kee Shee, Oklahoma State Univ. (United States)
Jerzy S. Krasinski, Oklahoma State Univ. (United States)
Jin-Joo Song, Oklahoma State Univ. (United States)

Published in SPIE Proceedings Vol. 4643:
Ultrafast Phenomena in Semiconductors VI
Kong-Thon F. Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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