Organic materials for real-time holographic recording

摘要

Photoactive organic layers, such as photochromic polymers and photopolymers, are investigated for real-time and in-situ holographic recording. The results with photochromic polymers, containing spiropyran and spirooxazine dyes, revealed that variations in the UV-beam excitation and visible recording beam procedures significantly changed the exposure sensitivities and diffraction efficienices. These effects were exploited for all-optical modulation of the holographic gratiings, and explained by the photochemical and thermal transformations between photochromic stereoisomers.