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Information × Registration Number 0221U106613, 0120U104900 , R & D reports Title Experimental-theoretical study and prediction of photoelastic properties of crystalline materials for control devices for electromagnetic radiation popup.stage_title Head Mytsyk Bohdan H., Доктор фізико-математичних наук Registration Date 15-12-2021 Organization Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine popup.description2  Based on the established components of the piezo- and elasto-optical coefficients (πim, pin) matrix, the indicative surfaces of piezo-optical (POE) and elasto-optical (ELOE) effects of Ca3Ga2Ge4O14 (CGG) and (NH4)2BeF4 crystals were constructed. The anisotropy of POE and ELOE in these crystals, as well as in crystals of the langasite group LGS (langasite, La3Ga5SiO14) and CTGS (catangasite, Ca3TaGa3Si2O14) was studied. The maximum values of the photoelasticity effect were established for the studied crystals and the acousto-optical quality coefficient was estimated on their basis. The construction and fur¬ther analysis of extreme surfaces of the acousto-optical quality coefficient М2 for crystals of the langasite group (LGS and CTGS) was performed. The maxima of these surfaces are several times higher than the М2 of quartz crystal, which is acti¬vely used in acousto-optical devices in the UV range. The geometries of effective sections of acousto-optical cells based on these crystals are given. The results on the acousto-optical properties of the studied crystals are compared with the properties of known acousto-optical materials. Quantum-mechanical method was used to calculate the elasticity and photoelasticity coefficients of the LGS and A2BX4 groups crystals Product Description popup.authors Dem'yanyshyn Nataliya M. Maksishko Yuliia Ya. Mytsyk Bohdan H. popup.nrat_date 2021-12-15 Close