Experimental verification of theory of photodeflection detection based on complex geometrical optics

Abstract
The goal of this work is to demonstrate the necessity of using the complex ray theory for a correct interpretation of the data obtained in photodeflection experiments with solids. In this work there is presented the comparison of methods of description of the probe beam interaction with thermal waves - the ray theory, the wave one and the complex ray theory with the experimental results. Some parameters of experimental setup are determined through multiparameter fitting the theoretical curves to the experimental data by the use of a weighted least square method. As a result of that it is proved that the calculation of the photodeflection signal in the framework of the complex ray theory is more accurate approach compared to those used so far.