anisotropic crystal

crystal, anisotropic 

A crystal that exhibits birefringence (double refraction).
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This anisotropic crystal fabric is a signature of plate formation that we have measured 70 million years later, out in the Pacific.
The dashed curve denoted "Iso semi-[infinity]" is calculated from the Yoffe-Shaibani-Hazzledine solution [6, 7] and the upper curve denoted "Aniso-[infinity]" assumes an infinite anisotropic crystal. The part of this latter curve, towards the negative Z, is not represented but is symmetrical with respect to [x.sub.3] = 0.
It is well known that some highly anisotropic crystal superstructures, such as shish-kebab can be produced from the oriented polymer melt [17-20].
Advancement follows when natural anisotropic crystal of calcite was used to realize a carpet cloaking at the scale of millimeters in visible spectrum [14,15].
Physical phenomena occurring during the propagation of light in an anisotropic crystal can be used to control the polarization of light.
Following 4], we consider this resonator to be made of lithium niobate (LiNb[O.sub.3]), an anisotropic crystal characterized by the following dielectric tensor:
Besides the capacity of the instrument for high accuracy, this was more importantly due to the fact that only a single, arbitrarily oriented, polished face suffices for the measurement of all three of the principal refractive indices of an anisotropic crystal. In these birefringent substances, two bright/dark demarcations are visible rather than one, and the locus (and thus the critical angle) for both lines changes with rotation about an axis perpendicular to the plane of contact between crystal and glass body.
For instance in the x-z plane, the propagation inside an anisotropic crystal for the TM case is described by
It also allows them to determine if their sample is crystalline or partially crystalline based on the birefringence of anisotropic crystals within the frozen matrix.
Among the topics are two-dimensional problems and waveguides, spherical waves and applications, spatial dispersion and warm plasma, optical waves in anisotropic crystals, and approximate analytical methods based on perturbation and variational techniques.
Topics include optical microscopy and spectroscopy of single molecules, optical properties of single conjugated polymer chains (polydiacetylenes), morphology-correlated photophysics in organic semiconductor thin films by confocal laser microscopy and spectroscopy, spectroscopy of long-lived photoexcitations in pi- conjugated systems, charge transport in disordered organic semiconductors, probing organic semiconductors with terahertz pulses, macroscopic polarization and exciton properties for strong exciton polaritons in anisotropic crystals, sub-5 fs spectroscopy of polydiacetylene, and ultrafast optoelectronic probing of excited states in low-dimensional carbon-based pi-conjugated materials.