Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Carl W. Ponader"'
Publikováno v:
Journal of the American Ceramic Society. 88:2447-2450
Single crystal CaF2 is the material of choice for optics in the vacuum UV, due in part to its high transmission at these wavelengths. Unfortunately, as the wavelengths decrease, intrinsic birefringence (also referred to as spatial dispersion) can bec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::529272f9a8c284d62117a67af9e67c7b
https://doi.org/10.1111/j.1551-2916.2005.00273.x
https://doi.org/10.1111/j.1551-2916.2005.00273.x
Publikováno v:
Comptes Rendus Chimie. 5:865-872
Clustering of rare-earth dopants in GeAs sulfide glasses was studied by fluorescence spectroscopy of Pr-doped glasses and by EPR measurements of Gd-doped samples. The linewidth of the g ∼ 2 resonance of Gd3+, as well as the relative intensity of em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecf0fe645d68a74cb365b794862b5953
https://doi.org/10.1016/s1631-0748(02)01458-3
https://doi.org/10.1016/s1631-0748(02)01458-3
Publikováno v:
Journal of Non-Crystalline Solids. :204-210
The coordination environments of Ge and As atoms in Ge x As x S 100−2 x glasses with 13.3⩽ x ⩽32.5 have been studied with Ge and As K-edge EXAFS spectroscopy. Ge and As atoms are fourfold- and threefold-coordinated, respectively, in all glasses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3d8051c088f30fd888752c3a3d539e5
https://doi.org/10.1016/s0022-3093(01)00672-x
https://doi.org/10.1016/s0022-3093(01)00672-x
Publikováno v:
Journal of Non-Crystalline Solids. 284:34-42
Stoichiometric Ge-poor (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35b3139e1653208d2d626c6db389a891
https://doi.org/10.1016/s0022-3093(01)00376-3
https://doi.org/10.1016/s0022-3093(01)00376-3
Autor:
Carl W. Ponader, Bruce G. Aitken
Publikováno v:
Journal of Non-Crystalline Solids. 274:124-130
GeAsS glasses with Ge:As ratios of 2.5:1, 1:1 and 1:2 with S concentrations ranging from 35% to 80%, corresponding to an average coordination number (〈r〉) ranging from 2.35 to 2.98 were synthesized. For glasses with fixed Ge:As ratio, the absorpt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55a3f648f44a0381c55e051b6edd428f
https://doi.org/10.1016/s0022-3093(00)00182-4
https://doi.org/10.1016/s0022-3093(00)00182-4
Autor:
Carl W. Ponader, Bruce G. Aitken
Publikováno v:
Journal of Non-Crystalline Solids. :143-148
Ternary GeAsS glasses have been investigated to determine the compositional dependence of selected physical properties. Although the latter show a linear variation with Ge:As ratio at a constant S content, many exhibit a non-linear dependence on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::323e959da3b344625ead479a71cadae1
https://doi.org/10.1016/s0022-3093(99)00324-5
https://doi.org/10.1016/s0022-3093(99)00324-5
Publikováno v:
Journal of Non-Crystalline Solids. 201:81-94
The local structure around titanium in sodiumtitaniumsilicate glasses was determined as a function of the silica content and the Na Ti ratio. The samples covering the range 16.7–33 mol% Na2O and 16.7–33 mol% TiO2 were prepared by melting pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f890ff0dda7ea774969bc6b4b7de5216
https://doi.org/10.1016/0022-3093(95)00636-2
https://doi.org/10.1016/0022-3093(95)00636-2
Publikováno v:
Geochimica et Cosmochimica Acta. 56:4205-4220
The structural environments of trace to minor levels (≈2000 ppm to ≈3.0 wt%) of U in several silicate glasses were examined as a function of oxygen fugacity, melt composition, and melt polymerization using X-ray (XANES and EXAFS) and optical abso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4f05b886f11a9865a4e9909c5f12503
https://doi.org/10.1016/0016-7037(92)90261-g
https://doi.org/10.1016/0016-7037(92)90261-g
Publikováno v:
Geochimica et Cosmochimica Acta. 55:1563-1574
The structural environments of trace levels (2000 ppm) of Zr4+ in several silicate glasses were examined as a function of melt composition and polymerization using Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Glass compositions inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42f7a29339e4f4232c4897d0f52f7965
https://doi.org/10.1016/0016-7037(91)90128-r
https://doi.org/10.1016/0016-7037(91)90128-r
Publikováno v:
SPIE Proceedings.
We present estimates of the refractive-index change in waveguides in silica produced by focused femtosecond laser pulses. The estimates are based on the shift of the central frequency of ω4 (TO) band (Si-O stretching mode) in micro-Raman spectra. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79c1174841f7b4155dea21da973eeb9c
https://doi.org/10.1117/12.669347
https://doi.org/10.1117/12.669347