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Information × Registration Number 0212U000134, 0110U006227 , R & D reports Title Development of new diagnostic methods of nanomaterials and nanostructures using stationary and pulsed laser fields. popup.stage_title Head Negriyko Anatoliy Mikhaylovich, Registration Date 18-01-2012 Organization Institute of physics NASU popup.description2 The purpose of work in 2011 was to determine the absolute values of nonlinear response, quantitative characterization of temporal evolution of nonlinear optical, optical and luminescent properties of nanomaterials in the time range n o 10-14 s - 10- 9 s using a unique in Ukraine facility "Femtosecond laser center " to develop new methods and certified hardware diagnostics nanomaterials, nanostructures and amorphous alloys. The object of studies have been integrated optical and nonlinear-optical methods and tools for characterization of electronic processes, optical, fluorescent and nonlinear optical parameters of nanomaterials. Red shift and splitting of the spectral bands of surface plasmons in the absorption spectra of copper nanoparticles, imbedded into the matrix of silica oxide were found at irradiation intense femtosecond laser pulses with a power density of 1011-1012 W/cm2. These phenomena are interpreted as the result of changes in dielectric constant of silicon oxide matrix and its anisotropy, induced by optical Kerr effect in an electric field of light waves amplified in the vicinity of metal nanoparticles. The proposed interpretation of the results are confirmed by measurements in different polarizations. After end of action of the pumping pulse the plasmon shifts in the blue side. This blue shift is also polarization-dependent and can be attributed to the formation of silicon oxide in the plasma around the nanoparticles. The effect can be used for characterization of metallic particles introduced into the dielectric matrix. Product Description popup.authors Блонський Іван Васильович Бойко Олексій Валентинович Борщ Анатолій Олександрович Бродин Михайло Семенович Волков Владислав Іванович Гнатовський Олександр Володимирович Гнатовський Олександр Володимирович Держипольсьска Людмила Анатоліївна Зубрілін Микола Глібович Ляховецький Володимир Романович Мацнєв Ігор Валентинович Негрійко Анатолій Михайлович Пирятинський Юрій Петрович Романенко Віктор Іванович Руденко Валентин Іванович Стьопкін Віктор Іванович Яценко Леонід Петрович popup.nrat_date 2020-04-02 Close