Light entering the liquid crystal is absorbed by the dye, generating heat which raises the average temperature of the liquid crystal. It is shown that the mode composition of lasing depends on the electric field, which affects the properties of the distributed feedback. Vintage Christmas Light Reflectors Covers Plastic Petal Star Tips Mixed Lot Orange Green Blue Red Pink Christmas Tree Decor. We report a liquid crystal smart reflector, consisting of a cholesteric liquid crystal doped with dye. The system found 25 answers for crystal that reflects light crossword clue. In the range of electrical voltages corresponding to the induction of a spatially periodic photonic structure, multimode lasing in the waveguide regime is detected. For the electric field strengths that correspond to fundamentally different distributions of the field of a CLC director, the fluorescence spectra of the DCM laser dye are studied both for different geometries (including the waveguide regime) and for different levels of optical pumping. The single-arm Argand-type lamp or sconce has a mirrored. In polarised light, the induced spatial modulation more » of the refractive index manifests itself in the form of banded domains oriented in the plane of the CLC layer perpendicular to the original (unperturbed electric field) direction of the director in the centre of the layer. Inspired by an Argand Wall Lamp circa 1790 in the collections of the Mount Vernon Ladies Association. In this work, an InGaN-based, green micro-photonic crystal-light-emitting-diode (-PCLED), which incorporates a nanoporous, GaN-distributed Bragg reflector. The electric-field-induced periodic field of the CLC director leads to spatial modulation of the refractive index and the appearance of optical properties typical of 1D photonic crystals, when light propagating in the plane of the CLC layer experiences Bragg reflection. The thickness of the CLC layer is chosen close to the natural pitch of the cholesteric helix, which corresponds to the second Grandjean zone. Sun Catcher Hanging reflective Crystal Light Rainbow Prism Window Glass UK This ones trending. Author = ,įluorescence and lasing in a structure with an electric-field-induced spatially periodic director modulation in the plane of a planar-oriented layer of a cholesteric liquid crystal (CLC) is experimentally investigated.
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