Picosecond Dynamics Of The GaAs (110) Surface Studied With Laser Photoemission

R. Haight; J. A. Silberman; M. I. Lilie

doi:10.1117/12.947208

22 August 1988 Picosecond Dynamics Of The GaAs (110) Surface Studied With Laser Photoemission

R. Haight, J. A. Silberman, M. I. Lilie

Proceedings Volume 0942, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors II; (1988) https://doi.org/10.1117/12.947208
Event: Advances in Semiconductors and Superconductors: Physics and Device Applications, 1988, Newport Beach, CA, United States

Abstract

A novel laser system and detection scheme is described which has been developed to investigate the transient dynamics of photoexcited electrons at material surfaces and interfaces with photoemission. The excited carrier population on the surface of GaAs (110) and the related Cr/GaAs (110) surface has been studied with 1-2 picosecond time resolution. Studies reveal a rapid rise and fall of the photexcited carrier population at the clean semiconductor surface within 15 picoseconds of excitation. For times greater than 15 picoseconds the carrier density decays slowly. Studies of the photoexcited surface after deposition of small numbers of Cr atoms reveal a remarkable decrease in the carrier density observed at the surface for a coverage as low as .006 monolayer.

Citation Download Citation

R. Haight, J. A. Silberman, and M. I. Lilie "Picosecond Dynamics Of The GaAs (110) Surface Studied With Laser Photoemission", Proc. SPIE 0942, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors II, (22 August 1988); https://doi.org/10.1117/12.947208

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