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Proceedings Paper

Picosecond Dynamics Of Dense Electron-Hole Plasmas In InGaAsP Films
Author(s): J. M. Wiesenfeld; A. J. Taylor
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Paper 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.

Paper Details

Date Published: 3 August 1987
PDF: 7 pages
Proc. SPIE 0793, Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors, (3 August 1987); doi: 10.1117/12.940882
Show Author Affiliations
J. M. Wiesenfeld, AT&T Bell Laboratories (United States)
A. J. Taylor, AT&T Bell Laboratories (United States)


Published in SPIE Proceedings Vol. 0793:
Ultrafast Laser Probe Phenomena in Bulk and Microstructure Semiconductors
Robert R. Alfano, Editor(s)

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