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Showing 1 to 6 of 6 for “"photorefractive effect"”.
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Picosecond Dynamics of Free-Carrier Populations, Space-Charge Fields, and Photorefractive Nonlinearities in Zincblende Semiconductors
… to spectroscopy or device fabrication. The photorefractive effect is a nonlinear optical effect that occurs in solids, where transport of an optically-induced free-carrier population results in an internal space-charge field, which produces an index change via the linear electrooptic effect. …
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Photorefractives for fast optics
… the nonlinear optical<br/>properties of novel photorefractive materials and devices. The focus of the work is<br/>centred on bringing together the attractive attributes of inorganic and organic<br/>materials in a single hybrid device and to increase the photorefractive effect that …
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Direct UV writing of structures in lithium niobate and lithium tantalate
… a lithium out-diffusion enhanced by a transient photorefractive effect. Waveguides were also written in stoichiometric and doped samples to test improvements in waveguide lifetimes. Surface domain reversal was observed in congruent lithium niobate on both +z and -z faces. Channel waveguides …
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Electrical and optical effects in hybrid liquid crystal cells
… was to characterise electrical and optical effects in hybrid liquid crystals. Hybrid form of liquid crystals was achieved by using photoconducting alignment layers in liquid crystals cells and also by including ferroelectric, inorganic nanoparticles in the liquid crystal bulk. Such liquid …
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Nonlinear optical studies of dye-doped nematic liquid crystals
… photoisomerization, and other guest-host effects. The guest-host mixtures can be employed in display applications, optical storage devices, and others. In this dissertation, nonlinear optical studies were carried out on dye-doped nematic liquid crystal cells. The main objectives of the …
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Der photorefraktive Effekt in vanadiumdotierten CdTe- und (Cd,Zn)Te-Kristallen
Es wird der Einfluss der Vanadiumdotierung auf den photorefraktiven Effekt sowohl in CdTe als auch in (Cd,Zn)Te untersucht. Sowohl die Kristallzüchtung als auch die Materialcharakterisierung, insbesondere mittels photorefraktiver Zweiwellenmischung, sind Bestandteil der Arbeit. <br> <br>Mittels …