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Origin of the oscillations in the self-diffracted signal in degenerate-two wave mixing experiment in azo-polymer
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The authors report on temporal oscillation in the first-order self-diffracted signal observed during the holographic grating recording in the azobenezne-functionalized polymer in the degenerate two-wave mixing experiment. Explanation of the oscillating character of the diffracted signal is given based on the assumption of appearance of symmetrical phase shift between the light intensity pattern and the diffraction grating. Simulations of the experimental results were performed based on simple theoretical considerations and they have shown a good agreement with the experimental data.
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