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Publikācija: Coherent Self-Enhancement of Dynamic Gratings in W-75 Molecular Glassy Films

Publication Type Conference paper
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Coherent Self-Enhancement of Dynamic Gratings in W-75 Molecular Glassy Films
Field of research 1. Natural sciences
Sub-field of research 1.3 Physical sciences
Authors Andris Ozols
Pēteris Augustovs
Peteris Studens
Elmārs Zariņš
Valdis Kokars
Keywords Self-enhancement of holographic gratings, light polarization, molecular glassy films
Abstract Self-enhancement (SE) of a dynamic hologram is the increase in its diffraction efficiency (DE) over time under the stimulus of a single beam light irradiation or simply in the dark [1]. Three types of SE can be distinguished: (i) coherent SE (CSE) due to the holographic recording by diffracted waves; (ii) incoherent SE due to the contrast and/or transmission increase of a hologram by incoherent light; (iii) relaxational (or dark) SE due to the contrast and/or transmission increase of a hologram by thermostimulated relaxation processes. All three SE types can take place simultaneously [1]. In this paper we have experimentally studied the CSE polarization dependence of dynamic transmission holographic gratings (HG) recorded in molecular glassy films W-75. A strong effect of recording and enhancing light polarizations on CSE is found. The highest CSE factor (showing the DE increase with respect to the initial DE ) of 14.5 was achieved in the case or recording and enhancing the grating by circular L-polarizations.
Reference Ozols, A., Augustovs, P., Studens, P., Zariņš, E., Kokars, V. Coherent Self-Enhancement of Dynamic Gratings in W-75 Molecular Glassy Films. In: Abstracts of the Riga Technical University 55th International Scientific Conference. Section: Material Science and Applied Chemistry, Latvia, Rīga, 14-17 October, 2014. Riga: RTU Press, 2014, pp.49-49.
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