Dispersion of refractive indices for (Cu1-xAgx)7GeS(Se)51 mixed crystals

Mykhaylo Pop; Viktor I. Studenyak; Leonid M. Suslikov; Ihor P Studenyak; Tetiana A. Martianova; Oleksandr M. Khoshaba; Piotr Kisała; Bakhyt Yeraliyeva; Ainur Kozbakova

doi:10.1117/12.2613332

3 November 2021 Dispersion of refractive indices for (Cu_1-xAg_x)₇GeS(Se)₅I mixed crystals

Mykhaylo Pop, Viktor I. Studenyak, Leonid M. Suslikov, Ihor P Studenyak, Tetiana A. Martianova, Oleksandr M. Khoshaba, Piotr Kisała, Bakhyt Yeraliyeva, Ainur Kozbakova

Author Affiliations +

Proceedings Volume 12040, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2021; 1204005 (2021) https://doi.org/10.1117/12.2613332
Event: Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2021 (WILGA 2021), 2021, Warsaw, Poland

Abstract

(Cu_1-хAg_x)₇GeS(Se)₅I mixed crystals were grown by vertical zone crystallization method, they are shown to crystallize in cubic structure ( F43m space group, Z=4). Refractive indices for (Cu_1-xAg_x)₇GeS(Se)5I mixed crystals were obtained from the spectral ellipsometry measurements. Two anomalies of refractive index in the spectrum region from 300 nm to 1000 nm are observed. One of them corresponds to the band-to-band optical transition while another one to the interband Van Hove-Phillips singularity. The dispersion dependences of refractive indices for (Cu1-хAgx)7GeS(Se)5I mixed crystals in the transparency region is well described by Wemple and DiDomenico model. The influence of the cation Cu→Ag substitution and anion S→Se substitution on the optical parameters of (Cu_1-хAg_x)₇GeS(Se)5I mixed crystals has been investigated.

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Mykhaylo Pop, Viktor I. Studenyak, Leonid M. Suslikov, Ihor P Studenyak, Tetiana A. Martianova, Oleksandr M. Khoshaba, Piotr Kisała, Bakhyt Yeraliyeva, and Ainur Kozbakova "Dispersion of refractive indices for (Cu_1-xAg_x)₇GeS(Se)₅I mixed crystals", Proc. SPIE 12040, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2021, 1204005 (3 November 2021); https://doi.org/10.1117/12.2613332

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KEYWORDS

Silver

Copper

Crystals

Germanium

Refractive index

Nonlinear crystals

Chemical species

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