ELLIPSOMETRIC MEASUREMENTS OF REFRACTIVE INDEX OF CHALCOGENIDE AND CHALCOGENIDE-BASED BULK GLASSY SAMPLES

The results of multiple angle ellipsometric measurements of As2S3, As2S3:CdJ2 and As2S3:NH4Cl glasses are presented. Surface optical properties of the glasses were found to be different from their bulk properties because a surface layer is formed due to the influence of the manufacturing process, surface treatment, and aging on near-surface part of the glasses. The ellisometrical method evaluates the refractive index values of bulk materials (nm) as well as characteristics of surface layer. Such relations are valid for the investigated glasses at 632.8 nm: nm(As2S3:CdJ2)> nm(As2S3)> nm(As2S3:NH4Cl). Determined values of nm for As2S3 glass are within typical refractive index values found by other researchers for glass of this composition. To our best knowledge, the values of the refractive index for As2S3:NH4Cl and As2S3:CdJ2 glasses are determined for the first time. 1