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Scheme of experimental set-up. Sh—shutter, P—prism, GF—gradient filter, S–sample, VS—voltage supplier, Det—germanium detector, —tilt angle, —reading angle, —writing angle, and —writing beams, —reading beam, , , and —“plus” first, “zero” and “minus” first order of diffracted beam .
Scheme of three steps of grating formation in liquid crystal panel (dark color—polymeric layer, white color—liquid crystalline layer). The interference pattern (a), charge generation and holes diffusion (b), electrons drift and charge separation (c), holes gathering on PVK:TNF and LC interface (d), and ions flow (e).
Diffraction efficiency coefficient temporal evolution during grating formation. Inset shows theoretical evolution of refractive index changes of each process. Grating period , applied voltage , and reading angle .
Normalized recording time constants (a) and normalized decay time constants (b) dependency on grating period.
Amplitudes A dependency of each process on grating period.
Estimated values of time constants and amplitudes.
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