Femtosecond transmission spectroscopy at the direct band edge of germanium
- 15 June 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 49 (23) , 16817-16820
- https://doi.org/10.1103/physrevb.49.16817
Abstract
We time-resolve the transient, photoinduced transmission near the direct 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 renormalization, carrier-carrier scattering, carrier cooling, and Γ→L intervalley scattering. An apparent carrier-density dependence in the measured intervalley scattering time is attributed to plasma screening of the Coulomb enhanced continuum absorption.Keywords
This publication has 15 references indexed in Scilit:
- Determination of intervalley scattering time in germanium by subpicosecond time-resolved Raman spectroscopyPhysical Review Letters, 1993
- Coherent dynamics of continuum and exciton states studied by spectrally resolved fs four-wave mixingPhysical Review B, 1993
- Coulomb enhancement of above-band-gap pump-continuum probe spectroscopyPhysical Review B, 1993
- Generation and detection of coherent optical phonons in germaniumPhysical Review Letters, 1992
- High-power, 62-fs infrared optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laserOptics Letters, 1992
- Subpicosecond kinetics of band-edge absorption inAsPhysical Review B, 1991
- Hot-carrier Coulomb effects in GaAs investigated by femtosecond spectroscopy around the band edgeApplied Physics Letters, 1990
- Quantum Theory of the Optical and Electronic Properties of SemiconductorsPublished by World Scientific Pub Co Pte Ltd ,1990
- Cooling of a carrier plasma in germanium investigated with subpicosecond infrared pulsesApplied Physics Letters, 1988
- Room-Temperature Optical Nonlinearities in GaAsPhysical Review Letters, 1986