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Stability improvement of high‐performance photorefractive polymers containing eutectic mixtures of electro‐optic chromophores
Author(s) -
Meerholz Klaus,
Bittner Reinhard,
De Nardin Yessica,
Bräuchle Christoph,
Hendrickx Eric,
Volodin Boris L.,
Kippelen Bernard,
Peyghambarian Nasser
Publication year - 1997
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19970091310
Subject(s) - photorefractive effect , chromophore , materials science , holographic data storage , eutectic system , polymer , holography , diffraction efficiency , optoelectronics , amorphous solid , organic photorefractive materials , crystallization , chemical engineering , optics , photochemistry , composite material , organic chemistry , microstructure , chemistry , physics , engineering , grating
Amorphous organic photorefractive materials , which are useful for reversible holographic applications such as real‐time optical processing and holographic data storage, have excellent performance but limited self life, often owing to the crystallization of one of the components. A technique is presented for improving the long‐term stability of composites based on poly(N‐vinylcarbazole) that uses mixtures of two isomeric electrooptically active chromophores. The self‐life is shown to be significantly increased and the photorefractive device performance as good as that of the best materials known previously.