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Nonlinear absorption present in two bis-phthalocyanines viz. Sm(Pc) 2 , and Eu(Pc) 2 , dissolved in dimethyl formamide, is studied for a number of wavelengths in the lower wavelength side of the Q-band of their linear absorption spectrum using open aperture Z-scan technique. It was observed that while Eu(Pc) 2 exhibited reverse saturable absorption at 604 nm, Sm(Pc) 2 ...
The electro-optical (EO) properties of monoclinic Sn 2 P 2 S 6 single crystals are measured by direct interferometric technique for electric fields applied parallel to the crystallographic x-axis that lies near the spontaneous polarization vector. The room temperature free EO coefficient r T111 reaches 174+/-10 pm/V at λ=633 nm and shows only weak dispersion...
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