نتایج جستجو برای: crystal defect
تعداد نتایج: 251931 فیلتر نتایج به سال:
many isotropic oils, this liquid crystal is not soluble in water. We therefore We have prepared monodisperse suspensions of nematic liquid use an ionic surfactant, sodium dodecyl sulfate (SDS), to stabilize the crystal droplets in water. The droplets are stabilized by polyvinyl droplets. This allows us to use standard fractionated crystallization methods alcohol, a polymer that induces planar a...
We consider the interaction and stability of gap solitons in a one-dimensional, resonant, photonic crystal with a defect state produced by a linear localized mode, or by an incoherent pump. Soliton propagation is investigated using both an analytical treatment and the direct numerical integration of the two-wave Maxwell-Bloch equations. Our results demonstrate that the soliton can be trapped, r...
We employed the hybrid DFT-LCAO approach as implemented in the CRYSTAL code for 135 atom supercell calculations of O vacancies with trapped electrons (known as the F centers) in three cubic perovskite crystals: SrTiO3, PbTiO3 and PbZrO3. The local lattice relaxation, charge redistribution and defect energy levels in the optical gap are compared. We demonstrate how difference in a chemical compo...
We propose a new approach for creating reconfigurable high-Q cavities in defect-free photonic crystal slabs (PCSs). The approach relies on selective air-hole infiltration in otherwise defect-free PCSs. We show that using this method we can design ultrahigh-Q microcavities, with Q~10(6). Numerical calculations indicate a large number of high-Q modes with high sensitivity, which are ideal for sim...
Photo-responsive double emulsions made of liquid crystal (LC) were prepared by a microfluidic device, and the light-induced processes were studied. The phase transition was induced from the center of the topological defect for an emulsion made of (N-(4-methoxybenzylidene)4-butylaniline (MBBA), and strange texture change was observed for an emulsion made of 4-cyano-4′pentylbiphenyl (5CB) doped w...
Logistic Regression for Crystal Growth Process Modeling through Hierarchical Nonnegative Garrote based Variable Selection Hongyue Sun, Xinwei Deng, Kaibo Wang, and Ran Jin Grado Department of Industrial and Systems Engineering, Virginia Tech., Blacksburg, VA 24061, USA Department of Statistics, Virginia Tech., Blacksburg, VA 24061, USA Department of Industrial Engineering, Tsinghua University, ...
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