FEMTOSECOND TRANSMISSION SPECTROSCOPY AT THE DIRECT BAND-EDGE OF GERMANIUM

Authors
MAK G VANDRIEL HM
Citation
G. Mak et Hm. Vandriel, FEMTOSECOND TRANSMISSION SPECTROSCOPY AT THE DIRECT BAND-EDGE OF GERMANIUM, Physical review. B, Condensed matter, 49(23), 1994, pp. 16817-16820
Citations number
17
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
49
Issue
23
Year of publication
1994
Pages
16817 - 16820
Database
ISI
SICI code
0163-1829(1994)49:23<16817:FTSATD>2.0.ZU;2-B
Abstract
We time-resolve the transient, photoinduced transmission near the dire ct band edge of crystalline germanium (at 295 K) with 120-fs, tunable, infrared pulses from a 76-MHz optical parametric oscillator. The data show a rich collection of phenomena including band-gap renormalizatio n, carrier-carrier scattering, carrier cooling, and GAMMA --> L interv alley scattering. An apparent carrier-density dependence in the measur ed intervalley scattering time is attributed to plasma screening of th e Coulomb enhanced continuum absorption.