Results 261 to 270 of about 5,333 (291)

Reflectivity and reflectance anisotropy of Si(100): a polarisable bond model

Surface Science, 1997
Abstract The reflectivity and reflectance anisotropy (RA) of the unreconstructed Si(100) surface are calculated using a model in which the semiconductor is a slab of polarisable bonds interacting by induced dipolar fields. Parameters for the calculations are obtained from ab initio calculations.
D. Herrendörfer, C.H. Patterson
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Sum rules in surface differential reflectivity and reflectance anisotropy spectroscopies

Applied Surface Science, 2001
Abstract The sum rule for the imaginary part of the dielectric function e″ can help in discriminating surface and bulk-related optical transitions, by means of the number of electrons taking part in the transitions. This is particularly simple in the region below the main critical points of the bulk band structure (below 3.5 eV for Si, below 2.2 eV ...
G Chiarotti, P Chiaradia, F Arciprete, C Goletti   +3 more
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Reflectance anisotropy of silicon surfaces: Discrete dipole calculation

Physical Review B, 1998
The reflectivity and reflectance anisotropy (RA) spectra of five silicon surfaces [(001), (113), (112), (111), and (110)] are calculated using the discrete dipole model. The structures used have bulk-terminated surfaces so that RA is found at the optical gap and above. A comparison is made between experimental RA spectra of H-covered (001), (113), and (
Hogan C., Patterson C.
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The Role Of Specular Reflectance In Surface Anisotropy

[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005
For smooth surfaces, specular reflection constitutes a major source of anisotropy in the surface bidirectional reflectance and introduces a strong illumination angle dependence in diurnal albedo. A prior formulation has been employed by the authors to account for the surface anisotropy of other natural surfaces.
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Reflections on the dependence of plastic anisotropy on texture

Materials Science and Engineering: A, 1998
Our present understanding of how anisotropic yielding behavior is related to crystallographic texture is built on a foundation laid by G.I. Taylor. Today, with the aid of computers, we can calculate the shape of yield loci from texture data and a knowledge of the slip systems.
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Reflection Anisotropy of 6328 A Laser Mirrors

Japanese Journal of Applied Physics, 1979
The reflection anisotropy of 6328 A laser mirrors is investigated using an internal mirror 6328 A He–Ne laser with a fused-silica plate inside the cavity. Experimental and theoretical studies are made of: 1) the dependence of the mode polarization of the laser on the mirror orientation about the axis of the discharge tube; 2) the dependence of the mode
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Reflection anisotropy spectroscopy of the oxidized diamond (001) surface

Journal of Physics: Condensed Matter, 2009
We report reflection anisotropy spectroscopy (RAS) measurements of the oxidized (001) surface of a type IIb natural diamond. These measurements were made possible due to recent developments in diamond surface preparation. We compare RAS results from the hydrogenated, clean and oxidized C(001) surface and demonstrate that RAS is sensitive to the ...
M, Schwitters, D S, Martin, P, Unsworth, T, Farrell, J E, Butler, P, Weightman   +5 more
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Stress-induced optical anisotropy in polycrystalline copper studied by reflection anisotropy spectroscopy

Journal of Physics D: Applied Physics, 2003
The optical properties of polycrystalline copper subjected to tensile stress are monitored in situ and in real time using reflection anisotropy spectroscopy (RAS). It is shown that RAS allows investigation of the plastic regime. Here, in contrast to the Hooke's law regime, the stress-induced RAS lineshape is found to be dependent on the applied stress.
R J Cole, S Kheradmand, D D Higgins, F Madani, B F Macdonald, V Koutsos, J R Blackford   +6 more
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The Anisotropy of X-Ray Reflection and Scattering from Hexagonal BN

Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics, 1993
B K-reflection spectra for grazing incidence angles (θ 0 = 4°, 8°), calculated absorption spectra, and angle-dependent scattering distributions at different grazing incidence angles and different wavelengths from hexagonal BN have been described.
E O, Filatova, T A, Blagoveshchenskaya
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Anisotropy as cause for polarity reversals of D″ reflections

Earth and Planetary Science Letters, 2011
Recordings of seismic events that sample the deep mantle can test different hypotheses of mantle processes and composition. Seismic reflections from structures in the D '' region the bottom 200-400 km of the Earth's mantle can provide information on the velocity contrasts in this region.
Thomas, C, Wookey, J, Brodholt, JP, Fieseler, T   +3 more
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