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Temperature-dependent refractive index measurements of wafer-shaped InAs and InSb
Glen D Gillen1, Chris Dirocco, Peter Powers
1Department of Physics, California Polytechnic State University, San Luis Obispo, California 93407, USA. ggillen@calpoly.edu
Abstract:
An experimental method is introduced to measure the refractive index and its temperature dependence for wafer-shaped infrared materials over a continuous temperature range. Using a combination of Michelson interferometry, Fabry-Perot interferometry, and a temperature-controlled cryostat in a laser micrometer, refractive index values and their temperature coefficients can be measured for any specific temperature within a desired temperature range. Measurements are reported for InAs and InSb for a laser wavelength of 10.59 microm.
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