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 language | English (US) |
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Pages (from-to) | 1477-1479 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 60 |
Issue number | 12 |
DOIs | |
State | Published - 1992 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)