Ensemble Monte Carlo simulation of optical excitation of AlGaAs

L. Shifren, D. K. Ferry, Kong-Thon Tsen

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


Ternary semiconductor alloys such as AlxGa1-xAs provide a challenge to our understanding of the physics of alloy effects in semiconductors. It is well known that AlxGa1-xAs is a two-mode alloy, even though the material is supposed to be a smooth random alloy. Recent experimental work has suggested that there is a non-monotonic behavior to the relative scattering strength of the Al mode. We have studied the transport of a range of alloys using the ensemble Monte Carlo (EMC) approach, incorporating the two LO modes, non-equilibrium phonons, and the full electron-electron interaction. We find that anomalies in the ratio of scattering strength, as measured by Raman scattering, are sensitive to the details of the phonon distribution function and the shape of the Raman signal with time. Differences in various reported results arise primarily from differences in measurement technique.

Original languageEnglish (US)
Pages (from-to)419-421
Number of pages3
JournalPhysica B: Condensed Matter
Issue number1-4
StatePublished - Dec 1 1999
EventProceedings of the 1999 11th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS-11) - Kyoto, Jpn
Duration: Jul 19 1999Jul 23 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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