Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
51 (1987), S. 430-432
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have measured the saturation of optical absorption in GaSb at wavelengths close to the band gap, and have determined the nonlinear absorption (α2) and refraction (n2) coefficients. At liquid-helium temperature a sharp free-exciton absorption line is observed which saturates with increasing incident laser intensity; we obtain values ||α2||=70 cm W−1 and ||n2||≈0.2 cm2 kW−1. At room temperature we do not observe a well-defined exciton; saturation of the residual interband absorption occurs at much higher intensity, and it is found to be obscured by strong thermal effects.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.98412
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