Optical and non-linear optical properties of the solid solutions AgGaGe3(1-x)Si3xSe8

Solid state solution AgGaGe3(1-x)Si3xSe8 in the range of x = 005-030 were synthesized and absorbance, FTIR, Raman spectroscopy, second harmonic generation measurements has been performed to explore linear and non-linear optical features The measured SHG intensity demonstrate significant dependence of non-linear optical properties from silica content. Analysing of Urbach's energy and Raman spectra allowed to determine the degree of defect depending on the chemical composition and temperature.