19 March 2015 Optical increase of photo-integrated micro- and nano-periodic susceptibility lattices
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It is demonstrated that the nonlinear photo-integrated micro- and nano-periodic second-order susceptibility lattices with very small amplitudes which were preliminarily recorded using bi-chromatic powerful laser light in amorphous glass materials can be increased up to some orders of magnitude under the action of a simple coherent monochromatic radiation. The optical increase of the small lattices takes place independent of the polarization and direction of propagation of the optical amplifying radiation and is achieved at various wavelengths. The observed phenomenon is not be explained only by nonlinear wave interaction in medium and also may be related to the microscopic asymmetry processes of the optical transitions between local centers in an isotropic medium that leads to the appearance and growth of the all-optically induced small micro- and nano-periodic electrical charges separations inside the sample. Possible mechanisms that may be responsible for the observed effects in the studied phosphate glasses are discussed.
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Vitaly A Smirnov, Vitaly A Smirnov, Liubov I. Vostrikova, Liubov I. Vostrikova, } "Optical increase of photo-integrated micro- and nano-periodic susceptibility lattices", Proc. SPIE 9448, Saratov Fall Meeting 2014: Optical Technologies in Biophysics and Medicine XVI; Laser Physics and Photonics XVI; and Computational Biophysics, 94480Y (19 March 2015); doi: 10.1117/12.2179705; https://doi.org/10.1117/12.2179705

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