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7 December 2022 Investigation of the Raman scattering spectra of ZnGeP2 crystals
A. I. Knyazkova
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Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123410R (2022) https://doi.org/10.1117/12.2644855
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia
Abstract
ZnGeP2 crystals with different optical breakdown thresholds studied in this work. The Raman spectra of the crystals were obtained using the inVia Reflex system with an excitation wavelength of 785 nm. It is shown that the obtained peaks at frequencies of 141.6, 203.3, 327.4, and 402.4 cm–1 correspond to the vibrational frequencies of the ZnGeP2 lattice for wafers cut parallel to the (100) crystallographic directions and the peaks at frequencies of 119.1, 245, 327.4, 357.1, 384.7, and 408.7 cm–1 to the (001) crystallographic directions. No correlation with the breakdown threshold was found. This fact confirms the assumption that the breakdown threshold in a given spectral range is determined not by thermal mechanisms, but by the dielectric breakdown of the crystal surface. This work was supported by the Ministry of Science and Higher Education of the Russian Federation (V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Sciences).
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A. I. Knyazkova "Investigation of the Raman scattering spectra of ZnGeP2 crystals", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123410R (7 December 2022); https://doi.org/10.1117/12.2644855
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KEYWORDS
Crystals
Raman spectroscopy
Nonlinear crystals
Crystallography
Raman scattering
Phonons
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