Intervalley scattering in GaAs and InP probed by pulsed far-infrared transmission spectroscopy

Peter N. Saeta, John F. Federici, Benjamin I. Greene, Douglas R. Dykaar

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

The dynamics of photoexcited electrons in GaAs and InP were studied using the transmission of 200-fs pulses of far-infrared radiation in the spectral range 15-100 cm-1. Kinetic traces of the infrared transmission as a function of delay between optical excitation and infrared probe show a probe-limited decrease in transmission followed by a more gradual (0.7-2 ps) drop to a steady value, consistent with the slow return of electrons from high-mass satellite valleys. Infrared transmission spectra, analyzed in the context of a Drude model, reveal density-dependent electron mobilities 3-4 times below equilibrium n-doped values. Electron-hole collisions likely account for the lower mobility.

Original languageEnglish (US)
Pages (from-to)1477-1479
Number of pages3
JournalApplied Physics Letters
Volume60
Issue number12
DOIs
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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