Optically-integrated periodical micro- and nano-patterns in amorphous materials

Abstract

The some characteristics of the optically-integrated in amorphous materials of the periodical micro- and nano-patterns are considered. The experimentally observed photo-induced phenomena which arise in presence of these patterns in medium are analyzed in accordance with pictures of the potential views of the flat or volumetric forms of the corresponding modulations as photo-created anisotropic refractive-index as nonlinear second-order susceptibility. The required schemes for experimental observations of the linear and non-linear optical interactions such as the constructive dispersion and diffraction of light on induced anisotropy and also the possible three-wave interactions on structure of second-order susceptibility are analyzed and corresponding experimental results are presented. The theoretical formula for estimated maximal intensity of the photo-induced signals of light from anisotropic periodicity and the calculated dependence of the pattern’s lifetimes from different low values of conductivities of used materials are presented and the corresponding observed results of processes of the recording and relaxation of pattern’s amplitudes in investigated samples of oxide glass are shown. The estimation on curve show that there are the possibilities for creation of patterns with lifetimes more than some days and it depends on the microscopic material properties. The existing tasks and steps for investigations as well as the opportunities and perspectives for future are also presented in conclusion. The work was realized as part of Russian State Task FWGW-2025-0019.

Speaker

Liubov I. Vostrikova
Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk
Russia

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