Ultrafast dynamics of holes in GaAs probed by two-color femtosecond spectroscopy

Autor:	F. Ganikhanov, K. C. Burr, C. L. Tang
Rok vydání:	1998
Předmět:	Physics Physics and Astronomy (miscellaneous) business.industry Scattering Physics::Optics Infrared spectroscopy Molecular physics Condensed Matter::Materials Science Wavelength Femtosecond Optical parametric oscillator Optoelectronics business Femtochemistry Ultrashort pulse Excitation
Zdroj:	Applied Physics Letters. 73:64-66
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.121724
Popis:	Ultrafast relaxation dynamics of light and heavy holes in GaAs following femtosecond valence-to-conduction-band excitation are measured by probing the light- and heavy-to-split-off hole transitions at different midinfrared wavelengths using the recently developed broadly tunable femtosecond optical parametric oscillator. The initial relaxation times are less than 75 fs, and a spectral hole-burning effect is seen. The results suggest that carrier–carrier and optical-phonon scattering, in particular, polar optical-phonon scattering, are the primary processes leading to the initial redistribution of heavy and light holes.
Databáze:	OpenAIRE
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