Thermal Lens Technique for the Determination of SiC Thermo-Optical Properties
In this paper we combine the use of photo-thermal techniques, Thermal lens (TL) spectrometry, Photoacoustic and heat capacity measurements to determine the optical path dependence with temperature (ds/dT) of a polycrystalline 3C-SiC sample. Results obtained for the polycrystalline sample with the TL technique show that ds/dT is negative at room temperature. This means that the thermal lens formed in 3C-SiC acts as a divergent lens when light impinges the sample. Our measurements, demonstrate that photo-thermal techniques can be used to obtain thermal parameters in circumstances where other techniques cannot be used, for example, in harsh environments.
Robert P. Devaty, David J. Larkin and Stephen E. Saddow
V. Anjos et al., "Thermal Lens Technique for the Determination of SiC Thermo-Optical Properties", Materials Science Forum, Vols. 527-529, pp. 703-706, 2006