Results 241 to 250 of about 2,529,892 (293)
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Effects of anisotropy in inhomogeneous optical fibers
Radio Science, 1977An approximate computer technique investigates wave propagation along radially inhomogeneous anisotropic fibers. The electromagnetic field components are determined by numerical integration across thin concentric tubes within the fiber core. The continuity of tangential components at the tube boundaries yields a dispersion relation for the propagation ...
Parriaux, O. +2 more
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Optical anisotropy of ellipsoidal quantum dots
Physical Review B, 2002The optical properties of anisotropic quantum dots with ellipsoidal shape are investigated and discussed as a function of the dot aspect ratio. The energy spectrum ~ground and many excited states! is calculated and analyzed in comparison with the spherical quantum dot. The optical matrix elements in the dipole approximation and the oscillator strengths
Cantele G +4 more
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Optical Anisotropy of Polycarbonates
1988The large optical anisotropy of bisphenol-A polycarbonate is mainly caused by the presence of the anisotropically polarising phenyl groups all located in the polymer backbone. By introducing an aromatic group in the polymer side-chain via the bisphenol-moiety we have tried to increase the perpendicular polarisability to obtain a smaller anisotropy of ...
G. H. Werumeus Buning +3 more
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Optical Anisotropy in Films of Photoaddressable Polymers
Macromolecules, 1999The photoinduced anisotropy in polymers and copolymers with a mesogenic and a nonmesogenic azobenzene moiety in the side chain were investigated. The results of the light-induced optical anisotropy study in thin films obtained by means of polarized UV−vis and IR absorption spectroscopy are presented.
Cimrová, V. +3 more
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Mechanical and optical anisotropy of bovine pericardium
Medical & Biological Engineering & Computing, 1992A Moiré fringe method was used to determine the shape of inflated disks of fresh bovine pericardium. The results suggested that the tissue was anisotropic and allowed the identification of the directions of the axes of elastic symmetry. Quantitative biaxial inflation and simple tension tests confirmed the anisotropy.
P, Zioupos, J C, Barbenel, J, Fisher
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Optical anisotropy in InAs/AlSb superlattices
Physical Review B, 1994The optical anisotropy in the layer plane of (100) InAs/AlSb superlattices was investigated by ellipsometry and by reflection difference spectroscopy. The superlattices are anisotropic in the (100) plane with the dielectric function along the [011] and [011\ifmmode\bar\else\textasciimacron\fi{}] axes differing by as much as \ensuremath{\sim}5% in the ...
, Santos +4 more
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Optical anisotropy of polyimide
Journal of Applied Polymer Science, 1990AbstractOptical anisotropy of polyimide films prepared from polyamic acid solutions was investigated by conoscopic observation and refractive index measurements. The conoscopic figure (crossed pattern) characteristic of a negative uniaxial crystal with its optic axis perpendicular to the film plane was observed for samples imidized on substrates ...
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Journal of Physics C: Solid State Physics, 1975
Normal-incidence reflectivity spectra of layer-type beta -GaSe crystals have been measured for E perpendicular to c as well as E//c at 78K. A strong anisotropy in the selection rules for interband transitions has been observed and a suitable energy level scheme is proposed.
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Normal-incidence reflectivity spectra of layer-type beta -GaSe crystals have been measured for E perpendicular to c as well as E//c at 78K. A strong anisotropy in the selection rules for interband transitions has been observed and a suitable energy level scheme is proposed.
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Induced optical anisotropy in heterodispersed systems
Applied Optics, 1980Magnetically induced extinction and birefringence of systems containing a mixture of ultramicroscopic particles with different optical and magnetic properties have been theoretically investigated. It is shown that the effects may exhibit an extremum and an inversion in sign with increasing applied field strength if the system contains diamagnetic as ...
D M, Bhagat, R V, Mehta, H S, Shah
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Correspondence of Optical Anisotropy to Magnetic Anisotropy in Iron Films
Journal of the Physical Society of Japan, 1982The differences between optical constants for the directions perpendicular and parallel to the incidence plane, Δ n and Δ k were measured in iron films deposited at oblique incidence and their correspondences to the anisotropy field H k were investigated.
Masao Kamiya +2 more
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