Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"two-beam coupling"”.
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Semiconductor nanocrystals for novel optical applications
… diffraction efficiencies in excess of 82%, two-beam-coupling gain coefficients in excess of 211 cm<sup>-1</sup>, and response times 34 ms have been observed, representing some of the best figures-of-merit reported on this class of materials. In addition to providing efficient …
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Nonlinear optical studies of dye-doped nematic liquid crystals
… employed in this study include asymmetric two-beam coupling, forced light scattering, and polarization holographic method. The asymmetric two-beam coupling experiments revealed that the induced grating was a photorefractive phase grating created by the nematic director reorientation within …
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Time domain measurement of the nonlinear refractive index in optical fibers and semiconductor film
… been developed. It is based on the time delay two-beam coupling of very intense picosecond laser pulses that have been self-phase modulated in the nonlinear optical medium. The two beams are coupled in a slow responding medium that is sensitive to time dependent phase distortions. We determine …
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Electrical and optical effects in hybrid liquid crystal cells
… chosen because of its low ionic content and the two latter ones as they are well-known low refractive index liquid crystals that also show low birefringence. The size and shape of these nanoparticles were characterised via three different imaging techniques, namely Atomic Force Microscopy (AFM), …