Thermal lens and photoacoustic spectroscopy to determine the thermo-optical properties of semiconductors N.G.C. Astrath, A.C. Bento, M.L. Baesso, A. Ferreira da Silva, R. Ahuja, C. Persson, S. Zhao et C.G. Granqvist J. Phys. IV France, 125 (2005) 181-183 DOI: 10.1051/jp4:2005125042