Topic
Organic photorefractive materials
About: Organic photorefractive materials is a research topic. Over the lifetime, 697 publications have been published within this topic receiving 13041 citations.
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TL;DR: In this paper, the photorefractive polymer with mixing two kinds of nonlinear chromophores was improved with 16% diffraction efficiency with 0.1 mm thick sample, and shelf lifetime of more than 2 months.
TL;DR: In this paper, photorefractive liquid crystal cells with a spatially varying refractive index are used to couple energy between surface plasmon modes and the behavior of the cells is described.
Abstract: Photorefractive liquid crystal cells with a spatially varying refractive index are used to couple energy between surface plasmon modes. Presented are details on maximising this energy transfer and the behaviour of our liquid crystal cells.
28 May 1999
TL;DR: In this paper, a patterned space charge field was generated via charge generation, drift and trapping in photorefractive polymer (PRP) materials for holographic data storage.
Abstract: Summary form only given. Polymeric nonlinear optical materials have been subject to intense research activity because of simple device manufacturing. Photorefractive polymer (PRP) materials may find use in applications such as holographic data storage. For holographic data storage in PRPs, interfering laser beams produce a patterned space charge field via charge generation, drift and trapping.
29 Aug 1994
TL;DR: In this paper, the elastic scattering spectra of barium sodium niobate (NBS), yttrium-doped lithium nibate (LN), and KDP were obtained with a source of polarised radiation of wide spectral range.
Abstract: tric crystals of barium sodium niobate (NBS), yttrium-doped lithium niobate (LN), and KHJ' O, (KDP) were studied. Due to the crystal growth conditions the layer-type domains formed a periodic two-dimensional superlattice in NBS and NL. In the case of KDP the domain subsystem consisted of domain blocks with quasiperiodic structure. The frequencyangular intensity distribution of polarized scattered light was registered at small angles (0-10') relatively to the pump direction. This technique allows to study polariton dispersion in Raman spectra.' pump radiation being of laser type. Elastic scattering spectra were obtained with a source of polarised radiation of wide spectral range. It was found that two diffraction effects must be taken into account in the processing of Raman spectra from multiply domained crystals. The first one is the linear diffraction of pump and scattered radiation. Under proper conditions additional branches or parts of them appear in spectra. In the case of KDP the ansiotropic diffraction of light leads to the appearance of gaps in the intensity distribution on the polariton branches, to the violation of the selection rules. The explanation of such spectra behaviour comes from the elastic scattering spectra, consisting of a large number of narrow lines with the same frequency-angular divergence as that of the gaps in Raman spectra. The second one is nonlinear diffraction due to the periodic variation of nonlinear susceptibility of a multiply domained crystal. The variation of secondorder optical properties between two neighbouring domains can be significantly higher than that of the first-order properties. In case of LN and the NBS the polar axes of the neighbouring domains were oriented oppositely and the sign of the quadratic susceptibility changed at the boundary. All diffraction effects lead to the appearance of the same shifted curves in spectra. The shift is determined by the relation
01 Jan 1996