EKHI
The open database of optical and radiative data
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Publications: 167 Total entries: 1251
Fundamental absorption edge in cadmium sulfide
David Dutton
The absorption and reflection spectra of CdS have been determined in the temperature range 90°-340°K by photoelectric measurements on single crystals, using polarized light. The temperature and frequency dependence of the absorption coefficient in the edge, over a substantial range …
3 entries
Some optical properties of CdSe single crystals
S. P. Keller, G. D. Pettit
Optical transmission and reflection measurements were made on a single crystal of CdSe (crystal class C₆ᵥ) with light polarized parallel and perpendicular to the 𝘤 axis. The absorption coefficients, μ⊥ and μII, were determined and are presented as functions of …
4 entries
Optical Properties of Single-Crystal Magnesium Oxide
M. W. Williams, E. T. Arakawa
The reflectance of single crystals of MgO was measured at a 15° angle of incidence for photon energies between 4 and 29 eV and the optical constants obtained by a Kramers-Kronig analysis of the reflectance data. In the energy range …
4 entries
Lattice Infrared Spectra of Boron Nitride and Boron Monophosphide
P. J. Gielisse, S. S. Mitra, J. N. Plendl, R. D. Griffis, L. C. Mansur, R. Marshall, E. A. Pascoe
The fabrication of highly dense, highly polished compacts consolidated from monocrystalline cubic boron nitride at very high pressures and temperatures has enabled us to record the infrared reflection spectrum of cubic boron nitride from 80 to 550°K. For annealed compacts, …
6 entries
MISCELLANEOUS PHOSPHIDES: Normal spectral reflectance
Lattice Vibration Spectra of Aluminum Nitride
A. T. Collins, E. C. Lightowlers, P. J. Dean
The reflectivity and transmission spectra of aluminum nitride have been measured using unpolarized radiation in the wavelength region 2 to 30 μ. The dielectric parameters and the zone-center (k≃0) opticalmode energies [transverse (TO) and longitudinal (LO)] have been calculated from …
8 entries
Ultra-violet optical properties of potassium fluoride
D. M. Roessler, H. J. Lempka
The reflection spectrum at normal incidence of monocrystalline potassium fluoride has been measured in the range 6-24 eV in the far ultra-violet. The data were analysed by means of a Kramers-Kronig transform to generate the dielectric parameters n2 - k2 …
1 entries
Infrared Transmission Spectrum and Lattice Vibration Analysis of Some Perovskite Fluorides
Ichiro Nakagawa, Atsushi Tsuchida, Takehiko Shimanouchi
Infrared absorption spectra of the perovskite fluorides KMF3 (M:Ni, Mg, and Zn) and NaNiF3 have been measured in the region 700 to 50 cm-1 at room temperature and liquid-nitrogen temperature. Three absorption bands for KMF3 were observed and these have …
9 entries
POTASSIUM MAGNESIUM TRIFLUORIDE KMgF₃: Normal spectral transmittance
POTASSIUM NICKEL TRIFLUORIDE KNiF₃: Normal spectral transmittance
MISCELLANEOUS CUBIC PEROVSKITE FLUORIDES: Normal spectral transmittance
A Polarizer for the Vacuum Ultraviolet
D. L. Steinrnetz, W. G. Phillips, M. Wirick, F. F. Forbes
The construction and optical properties of a MgF2 double Rochon prism are described. The prism is useful as a polarizer or analyzer in the vacuum uv wavelengths longer than 1300 Å. Measurements of MgF2 transmission and of polarizer angular beam …
4 entries
Electronic spectrum of crystalline lithium fluoride
D. M. Roessler, W. C. Walker
The reflection spectrum of freshly cleaved lithium fluoride has been measured from the near ultraviolet to 28 eV. The real (ε1) and imaginary (ε2) parts of the dielectric response function have been computed via the Kramers-Kronig relations. The Γ exciton …
3 entries
SODIUM FLUORIDE NaF: Normal spectral reflectance
Formation and Bleaching of X-ray induced F-centers in CaF2
J. Arends
Results are presented on the formation and optical bleaching of X-ray induced F-centers in CaF2 at liquid nitrogen temperature. The data indicate that the F-center vacancies are created by the irradiation. After optical bleaching the vacancies can easily be refilled …
3 entries