Photochromic mesomorphic polymers as holographic data storage materials
- Universitaet Bayreuth (Germany); and others
Liquid crystalline side chain copolymers containing photochromic azobenzene and mesogenic side groups as well as non-mesogenic comonomer units exhibited distinct changes of the refractive index (RI) upon irradiation. DSC and thermo-optical studies revealed that this phenomenon is linked to the isotropic glass-mesophase transition and was caused by laser-induced trans-cis isomerization of the photochromic side groups. The efficiency of the RI-modulation and thus the writing of holographic patterns changed with copolymer composition and the sample history or thermal treatment, respectively. The results and their implication for the understanding of photochemistry in polymer glasses and mesophases as well as photonic materials will be discussed.
- OSTI ID:
- 126989
- Report Number(s):
- CONF-950402-; TRN: 95:006086-1077
- Resource Relation:
- Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of 209th ACS national meeting; PB: 2088 p.
- Country of Publication:
- United States
- Language:
- English
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