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Showing 1 to 10 of 10 for “"Dielectric functions"”.
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Ab initio computational applications of electronic structure and spectroscopic Properties of bulk Crystalline materials
… near edge structure (XANES) and optical dielectric functions] of elemental boron were systematically studied using an ab initio orthogonalized linear combination of atomic orbitals (OLCAO) method. Based on available experimental data, the calculated electronic structure, dielectric …
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Quantum non-contact friction in resonant dielectric media
… force induced between two isotropic planar dielectric slabs which obey a plasma model dielectric function using scalar electromagnetism. All computations are carried out at zero temperature. Strong constraints on the integration parameters which define the friction force are derived and …
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Raman, Infrared, X-ray, and EELS Studies of Nanophase Titania
… crystals. These results, which determined the dielectric functions of anatase, were used to explain infrared (IR) reflectivity spectra of titania nanoparticles pressed into pellets, as well as the grazing-incidence IR reflectivity observed for titania thin films. Because of the polycrystalline …
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High pressure surface enhanced Raman scattering spectroscopy
… in the nanoparticles and changes in the dielectric functions with pressure should be taken into account when designing SERS substrates intended for working at high pressures.
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Thermal radiative properties of disordered media and deep metal gratings
… from the measured radiative properties. The dielectric functions are modeled which indicate a distinctive polycrystalline structure of the Si3N4 plates compared with previous reports. (2) A diffusive dual-layer solar reflector is fabricated and characterized. Its record-high solar reflectance …
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Carrier momentum relaxation in highly doped polar semiconductors and semiconductor heterostructures
… of the collective modes. Our approach uses dielectric functions to describe both the carrier-collective mode scattering and the decay of the collective modes. We applied our method to bulk polar semiconductors and heterostructures where various polar dielectrics surround a semiconducting …
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Complex phase behavior of exotic oxides: optical spectroscopy studies
… orbital ordering, respectively, on the dielectric functions of Bi1_xCaxMn03 (x > 0.5) over the large energy scales by using spectroscopic ellipsometry. Orbital ordering precedes the charge ordering and is affected by the charge ordering at the charge ordering temperature Teo, and …
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Polyelectrolyte multilayers for plasmonics and picosecond ultrasonics
… particles. The data are modeled using an average dielectric function instead of the dielectric functions of air and polyelectrolytes. In addition using a measured dielectric function of the gold nanoparticles, the position of the LSP absorption peak could be simulated with good agreement to the …
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Investigation of the optical properties of Bi₂Sr₂Ca<sub>n-1</sub>Cu<sub>n</sub>O<sub>y</sub> (n=1,2) by transmission electron energy loss spectroscopy
… Bi₂Sr₂CuO₆ materials were investigated, and the dielectric functions of these materials were derived by Kramers-Kronig analysis. A broad excitation centered at 2.7eV was identified as associated with the Cu — O₂ layer by comparing the spectrum of Bi₂Sr₂CaCu₂O₈ with that of Bi₂Sr₂CuO₆. A pseudo …
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Electronic, optical, mechanical and thermoelectric properties of graphene
… In this study, optical properties including dielectric functions, absorption coefficient, transmittance, and reflectance, as a function of wavelength and incident energy, are studied. Refractive index and extinction coefficient of pristine graphene are presented. A key optical property in the …