Ultrafast spectroscopy of hot electron and hole dynamics in GaP

Christopher M. Collier; Brandon Born; Xian Jin; Jonathan F. Holzman

doi:10.1117/12.2023798

28 September 2013 Ultrafast spectroscopy of hot electron and hole dynamics in GaP

Christopher M. Collier, Brandon Born, Xian Jin, Jonathan F. Holzman

Proceedings Volume 8845, Ultrafast Imaging and Spectroscopy; 88450U (2013) https://doi.org/10.1117/12.2023798
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

This work analyzes ultrafast carrier dynamics in GaP under intense photoexcitation. The dynamics are initially dominated by hot electron scattering from the central Γ valley to the X₇ sidevalley over 700 fs and X₆ sidevalley over 4 ps. Subsequent pump-fluence-dependent relaxation is observed over 30 to 52 ps for as pump fluence increases. This prolonged energy relaxation is ascribed to impeded phonon decay. Experimental and theoretical results are shown to provide evidence for a hot phonon bottleneck at the high fluences. The implications of these ultrafast carrier dynamics are discussed for emerging GaP applications.

Citation Download Citation

Christopher M. Collier, Brandon Born, Xian Jin, and Jonathan F. Holzman "Ultrafast spectroscopy of hot electron and hole dynamics in GaP", Proc. SPIE 8845, Ultrafast Imaging and Spectroscopy, 88450U (28 September 2013); https://doi.org/10.1117/12.2023798

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