Picosecond Dynamics Of Dense Electron-Hole Plasmas In InGaAsP Films

J. M. Wiesenfeld; A. J. Taylor

doi:10.1117/12.940882

3 August 1987 Picosecond Dynamics Of Dense Electron-Hole Plasmas In InGaAsP Films

J. M. Wiesenfeld, A. J. Taylor

Proceedings Volume 0793, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors; (1987) https://doi.org/10.1117/12.940882
Event: Advances in Semiconductors and Semiconductor Structures, 1987, Bay Point, FL, United States

Abstract

The dynamics of dense electron-hole plasmas in submicron thick films of InGaAsP are studied by time-resolved absorbance and photoluminescence techniques. The plasmas are created by excitation with a 0.5 ps optical pulse, and have initial densities between 5x 1020 and 1 x 1018 cm-3. At these high initial densities, significant band filling is observed. The plasma cools rapidly within ~1 ps. The plasma density then decays by rapid spatial expansion driven by the Fermi pressure of the plasma, until a density of ~6x1018 cm-3 is reached. In this initial phase, plasma expansion is much more rapid than Auger recombination. Subsequently, the plasma decays by a combination of Auger and bimolecular radiative recombination. Band gap renormalization and generation of acoustic phonons resonant with the thickness of the thin films are also observed.

Citation Download Citation

J. M. Wiesenfeld and A. J. Taylor "Picosecond Dynamics Of Dense Electron-Hole Plasmas In InGaAsP Films", Proc. SPIE 0793, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors, (3 August 1987); https://doi.org/10.1117/12.940882

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