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Proceedings Paper

A two-dimensional drift-diffusion model of THz emission from n-GaAs and InAs surfaces in a magnetic field (Invited Paper)
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Paper Abstract

We present a model of THz emission enhancement from femtosecond pulse excited n-GaAs and InAs surfaces with the application of a dc magnetic field. The far-field THz emission at different optical excitation densities, magnetic field strengths, and magnetic field orientations is determined. The model accurately describes the power dependence of THz emission from n-GaAs and InAs surfaces for magnetic field strengths up to ±10 T and ±6 T, respectively. THz emission saturation in both semiconductors for optical excitation densities from 40 nJ/cm2 to 2.2 μJ/cm2 are in accordance with previously reported experimental data. The model provides a useful tool for the description of ultra-fast processes in semiconductors.

Paper Details

Date Published: 13 April 2005
PDF: 12 pages
Proc. SPIE 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX, (13 April 2005); doi: 10.1117/12.590643
Show Author Affiliations
Kenneth J. Chau, Univ. of Alberta (Canada)
Abdul Y. Elezzabi, Univ. of Alberta (Canada)


Published in SPIE Proceedings Vol. 5725:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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