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Information × Registration Number 0216U000421, 0113U002364 , R & D reports Title Non-linear optical absorption of light and energy structure of photonic glasses at variation of local atomic configuration. popup.stage_title Head Mitca Volodymyr, Доктор фізико-математичних наук Registration Date 03-02-2016 Organization State Higher Educational Institution "Uzhgorod National University" popup.description2 During introduction up to 30 mol. % GeS2 into As2S3 and up to 7 mol% As into GeS2 there was found lowering of nonlinear optical two-photon light absorption at 0, 69 microns from 0.1 to 0.05 and from 0.075 to 0.025 cm / MWt, as well as increasing of laser threshold damage of this glasses from 40 to 85 and 25 to 45 MWt / cm2, = 40 nsec respectively. In first time have been calculated of molecular orbitals diagram, electron density distribution of HOMO and LUMO states of clusters As(Ge)nSm, reflecting the electronic structure of glasses GeS2 and As2S3 a clustered approach and a model of pseudogap and the density of localized states (E) p-GeS2 (E03.2 eV) and As2S3 (E02.4 eV) . For AsxGeS2 glasses at x> 7 except basic structural component the new nanoclusters based on the structural units (s.u.) SGe3 / 3 appeared . Such s.u . leads to the formation of states below the bottom of the conduction band which is accompanied with increasing of the density of states in the bandgap and growing of nonlinear optical absorption. Product Description popup.authors Голомб Роман Михайлович Кондрат Олександр Борисовович Міца Володимир Михайлович Попович Наталія Іванівна popup.nrat_date 2020-04-02 Close