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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10 Nov 1997
TL;DR: In this paper, a new imaging technique for photo-induced index change in photorefractive crystals was developed, and the formation of waveguide structures were successfully visualized both spatially and temporally.
Abstract: In summary, we have developed a new imaging technique for photo-induced index change in photorefractive crystals Formation of waveguide structures were successfully visualized both spatially and temporally This technique will be an useful tool for monitoring versatile photorefractive phenomena, including photorefractive grating formation
TL;DR: In this paper, the photorefractive effects of the as-grown and proton-implanted KNbO3 crystals were studied by two-wave mixing at 62.2µW/cm2 illumination.
Abstract: The photorefractive effects of the as-grown and proton-implanted KNbO3 crystals were studied by two-wave mixing at 62.2µW/cm2 illumination. At this pump power level, the as-grown crystal showed little photorefractive effect, while the proton-implanted crystal showed an obvious effect. Furthermore, there seemed to exist two photorefractive gratings with response times of 22.54 and 1596.30s, at 62.2µW/cm2 pump power level, in the proton-implanted sample. This phenomenon has been attributed to the influence of proton-implantation.
TL;DR: In this paper, the correlation between the optical response time and photoelectric quantities, such as the hole mobility and the dispersivity of charge carrier transport, was investigated for organic photorefractive materials.
Abstract: Organic photorefractive materials have attracted a lot of interest recently. Their optical response times of a few milliseconds, however, are not yet adequate for the desired commercial applications. We present an investigation on the correlation between the optical response time and photoelectric quantities, such as the hole mobility and the dispersivity of charge carrier transport.
TL;DR: In this paper, the propagation of a diffracted beam by a straight edge like initial condition in a photorefractive crystal under drift nonlinearity was studied and it was observed that the diffracted pattern and propagation is enhanced in the form of multiple waveguides.
Abstract: We show experimental results for the propagation of a diffracted beam by a straight edge like initial condition in a photorefractive crystal under drift nonlinearity. We have observed that the diffracted pattern and propagation is enhanced in the form of multiple waveguides.
28 May 1999
TL;DR: In this paper, a coherent ring-loop oscillator with a crystal pumped by He-Ne laser is described. But the oscillation occurs with two roughly symmetric temporal frequencies and therefore the output oscillation wave exhibits the high contrast intensity modulation.
Abstract: Summary form only given Tin hypothiodiphosphate (Sn/sub 2/P/sub 2/S/sub 6/) is a promising photorefractive material for red and near-infrared spectral range with the gain factor more than 10 cm/sup -1/ and the millisecond response time We report on particular behaviour of the coherent ring-loop oscillator with this crystal pumped by He-Ne laser With no special measures the oscillation occurs with two roughly symmetric temporal frequencies and therefore the output oscillation wave exhibits the high contrast intensity modulation The reason of this unusual feature is in special shape of the gain spectrum itself, typical for the crystals with two out-of-phase photorefractive gratings formed by the charge carriers of different sign