NDLI: Photorefractive effects in organic glass

Content Provider	IEEE Xplore Digital Library
Author	Twieg, R.J. You, F. Wortmann, R. Matschiner, R. Glania, C. Lukaszuk, K. Kramer, P. Moerner, W.E. Wright, D. Diaz-Garcia, M. Lundquist, P.M. Geletneky, C. Jurich, M. Lee, V.Y. Moylan, C.R. Burland, D.M.
Copyright Year	1998
Description	Author affiliation: Dept. of Chem., Kent State Univ., OH, USA (Twieg, R.J.)
Abstract	In most organic photorefractive systems discrete components are assigned for each function, i.e., a photochemical charge generating species, a transport media, a nonlinear chromophore and, in some cases, even trapping species. All these components are mixed with, attached to, or otherwise constitute some kind of polymer binder that may also contain plasticizers to control the glass transition temperature. These systems are obviously complex mixtures that may sometimes suffer from heterogeneity, phase separation, and resulting poor linear optical properties due to scattering and other fluctuations. A general goal then is to design compositions that contain a minimum number of discrete components and this can be accomplished by designing molecules which are multifunctional and perform more than one of the requisite tasks. It is even possible to eliminate the polymer altogether and form high optical quality monomeric molecular glasses from specially modified chromophores. It turns out that glass formation in organic monomers is really not that uncommon. However, the optimization of monomer glasses to enhance the temperature range and stability of the glass phase entails understanding and control of the appropriate structure features such as hydrogen bonding and conformational flexibility. For photorefractive applications highly birefringent chromophores in the pyridone and methylenedihydropyridine families were identified and by appropriate structure modifications were converted to highly stable glasses. The characterization of the electronic and structural properties of these of these materials and other related chromophores to provide useful photorefractive media is being actively pursued.
File Size	185392
File Format	PDF
ISBN	1557525412
DOI	10.1109/IQEC.1998.680092
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-05-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Optical Soc. Of America
Subject Keyword	Photorefractive effect Glass Optical polymers Optical scattering Temperature control Nonlinear optics Photochemistry Fluctuations Temperature distribution Stability
Content Type	Text
Resource Type	Article

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