Journal ArticleDOI
Full geometry dependence of index contrast in photorefractive polymer composites
TLDR
The field dependent photogeneration efficiency is introduced into the complete reorientational model to provide a full account of the electric field and geometrical dependence of the index contrast.Abstract:
Detailed analysis of the relationship between the experimental geometry and the holographic contrast in photorefractive polymers is important for applications, such as angle multiplexing in holographic data storage. In this paper the field dependent photogeneration efficiency is introduced into the complete reorientational model to provide a full account of the electric field and geometrical dependence of the index contrast. The interaction of a local grating and the photorefractive grating is also considered. A simplification for acute angles between writing beams is described. Experimental verification by use of four-wave mixing and transmission ellipsometry reveals an excellent agreement between theory and measurement.read more
Citations
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Journal ArticleDOI
Field-independent grating formation rate in a photorefractive polymer composite sensitized by CdSe quantum dots
TL;DR: In this article, the rate of grating formation in a photorefractive polymer composite sensitized by CdSe quantum dots is found to be independent of applied field, in contrast to similar composites sensitized with other types of nanoparticles.
Journal ArticleDOI
Interdigitated coplanar electrodes for enhanced sensitivity in a photorefractive polymer
Cory W. Christenson,Charles Greenlee,Brittany Lynn,Jayan Thomas,Pierre Alexandre Blanche,R. Voorakaranam,P. St Hilaire,Lloyd LaComb,Robert A. Norwood,Michiharu Yamamoto,Nasser Peyghambarian +10 more
TL;DR: This new device's structure greatly improves the diffraction efficiency and sensitivity compared to less slanted standard devices necessary for some real applications, such as holographic displays, optical coherence imaging, and in-plane switching.
Proceedings ArticleDOI
Optical coherence tomography using a photorefractive polymer composite
TL;DR: In this paper, a photorefractive polymer composite device was used as a coherence gate for optical coherence tomography, which could enable high-resolution 3D images of tissue samples to be holographically stored, and read out in real-time, or at a subsequent time.
Journal ArticleDOI
Image cross-connector using a photorefractive polymer
TL;DR: An experiment with a hole-transport polymer PATPD is conducted to verify the operations of an image cross-connector, in which different images from a vertical array of input images would be connected separately to two output ports by two control beams that were injected at different angles.
References
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Journal ArticleDOI
Holographic storage in electrooptic crystals. i. steady state
TL;DR: In this paper, a non-linear theory of self-diffraction on the light induced grating of refractive index in electrooptic crystals is developed and the intensities of the diffracted beams, the diffraction efficiency, and the shape of the surfaces of equal index change are calculated analytically for saturation holograms.
Journal ArticleDOI
Deviations from Ohm's Law in Weak Electrolytes
TL;DR: In this article, the effect of an external electric field on the electrolytic dissociation is computed kinetically from the equations for Brownian motion in the combined Coulomb and external fields, and the result is an increase of the dissociation constant, by the factor K(X)/K(0) = F(b) = 1+b+(1/3)b2.
Journal ArticleDOI
Electric field assisted dissociation of charge transfer states as a mechanism of photocarrier production
TL;DR: In this paper, the lowest charge transfer excited state (CT1) of electron donor-acceptor crystals or polymers is demonstrated to be a plausible precursor of free charge carriers when such materials are photoexcited.
Journal ArticleDOI
A photorefractive polymer with high optical gain and diffraction efficiency near 100
TL;DR: In this article, the authors describe a polymer composite with excellent photorefractive properties, achieving a diffraction efficiency approaching 100% and a net two-beam coupling gain of more than 200 cm-1.
Journal ArticleDOI
holographic storage in electrooptic crystals. II. beam coupling—light amplification
TL;DR: In this paper, the theory of energy transfer between two coupled beams writing holograms in electrooptic crystals is developed and the gain is calculated for different processes causing holographic recording in the crystal.