Intervalley Scattering In GaAs

Jagdeep Shah

doi:10.1117/12.947196

22 August 1988 Intervalley Scattering In GaAs

Jagdeep Shah

Proceedings Volume 0942, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors II; (1988) https://doi.org/10.1117/12.947196
Event: Advances in Semiconductors and Superconductors: Physics and Device Applications, 1988, Newport Beach, CA, United States

Abstract

We report a slow rise of luminescence in GaAs following photoexcitation by 0.3 ps dye laser near 6000 Å. We show that both the near bandgap luminescence (at 1.44 eV) and the integrated luminescence take nearly 10 ps to reach their maximum value. We show that the primary cause of this slow rise is the slow return of electrons from the L to the r valley. By fitting our data with an ensemble Monte Carlo calculation, we determine the T-L deformation potential to be (6.5±1.5) x108 eV/cm. We show that the electrons returning to the I' valley act as a source of heating for the photoexcited plasma. We further show the importance of electron-electron scattering and inadequacy of a simple phonon cascade model, even at a density as low as 5x 10 ¹⁶cm^-3.

Citation Download Citation

Jagdeep Shah "Intervalley Scattering In GaAs", Proc. SPIE 0942, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors II, (22 August 1988); https://doi.org/10.1117/12.947196

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