Green light stimulation of photo-integrated micro-lattices

Abstract

Prolonged time of an existence for the nonlinear photo-integrated micro-lattices is connected not only with a conductivity of a medium but it depends on an illumination of the used samples. In this report the possibility of the green light stimulation of the photo-integrated micro-periodic second-order susceptibility lattices is demonstrated. The micro-lattices with very small amplitudes, which were preliminarily written using bi-chromatic powerful laser light, can be increased in some materials up to sufficiently big magnitudes under the action by green radiation. The optically stimulated growth of the small susceptibility lattices takes place independently on a polarization or a direction of propagation of the optical amplifying radiation. The observed phenomenon is not be explained only by considering of the possible nonlinear waves interactions in investigated samples and also may be related to the microscopic asymmetry processes of the optical transitions between local molecular centers. That leads to the appearance of the stimulated growth of the all-optically induced small micro-periodic separations of charges inside the medium and we analyze the possible processes in our investigations. The studied photo-integrated lattices may be useful in future for micro-optics and bio-photonics.

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Liubov I. Vostrikova
Rzhanov Institute of Semiconductor Physics SB RAS, Departments of Mathematics and Natural Sciences and Informational Technologies of NSUEM
Russia

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