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  • 1
    Electronic Resource
    Electronic Resource
    Transparent glass ceramics for 1300 nm amplifier applications (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 6367-6374 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The properties of an oxyfluoride glass ceramic that possesses high transparency after ceramming are described. Approximately 25 vol % of this material is comprised of cubic, fluoride nanocrystals and the remainder is a predominantly oxide glass. When doped with Pr+3, the fluorescence lifetime at 1300 nm is longer than in a fluorozirconate glass, suggesting that a significant fraction of the rare-earth dopant is preferentially partitioned into the fluoride crystal phase. This material has the added advantage of being compatible with ambient air processing. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360518
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  • 2
    Electronic Resource
    Electronic Resource
    Nonlinear optical susceptibilities of high-index glasses (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 1293-1295 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report results of degenerate four-wave mixing measurements of nonresonant nonlinearities in a variety of high-index lead and bismuth containing oxide glasses and the chalcogenide As2S3. The third-order nonlinear susceptibilities of the oxide glasses are found to scale with the heavy metal content. A lead-bismuth-gallate glass was identified with a nonresonant χ3 equal to 42±7×10−14 esu, which is approximately three times larger than that of any glass previously reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100697
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum confinement effects of semiconducting microcrystallites in glass (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 5399-5409 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The optical properties of glasses containing a small amount of thermally developed CdSexS1−x microcrystalline phase are studied with emphasis on quantum confinement effects exhibited at small crystallite size. Optical absorption, photoluminescence, x-ray diffraction, and transmission electron microscopy are used to examine microcrystallites as a function of composition and development. Results are presented for a series of commercially available CorningR filter glasses with a selenium mole fraction in the range 0.28≤x≤0.74, as well as for several experimental glasses in which the average microcrystallite diameters range from 30 to 80 A(ring). Optical effects observed in the experimental glasses that are due to electron and hole confinement are not present in the filter glasses considered; variations in optical properties of the filters are due to changes in stoichiometry of the CdSexS1−x mixed anion system. A brief discussion of other microcrystalline phases in glass is also presented. These microcrystallites show room-temperature optical absorption structure analogous to bulk crystal excitons; the temperature dependence of this structure is contrasted with that resulting from quantum confinement in CdSexS1−x glasses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338280
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  • 4
    Electronic Resource
    Electronic Resource
    Electric-field-induced birefringence properties of high-refractive-index glasses exhibiting large Kerr nonlinearities (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 2774-2779 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electro-optic Kerr effect and its wavelength dispersion have been measured in glasses representing several compositional systems. The measured Kerr effect was found to be large for glasses having large refractive indices, including: (i) glasses containing high concentrations of the heavy metals Pb, Bi, and Tl; (ii) glasses with high Nb, Ta, and Ti content; and (iii) tellurite glasses. Comparison of the third-order nonlinear susceptibility, χeff(ω = ω + 0 + 0), obtained from the measured electro-optic data, to values estimated from literature values of the optical frequency value, χeff(ω = ω + ω − ω) suggest an opposition of the electronic and nuclear contributions to the low-frequency electro-optic effect for the glasses containing Ti, Ta, or Nb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349363
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  • 5
    Electronic Resource
    Electronic Resource
    Optical properties of chemically reduced photochromic glasses (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2756-2759 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photochromic glasses subjected to reducing treatments at elevated temperatures develop a colored layer through the reduction of the silver halide phase. The nature of this process is investigated with respect to the temperature and time of the reduction treatment. An explanation of the color development is offered based on the comparison to an alternate way of producing the reduced silver absorption. In addition, the optical bleaching that is observed is discussed and a mechanism is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340973
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  • 6
    Electronic Resource
    Electronic Resource
    Polarized excimer laser-induced birefringence in silica (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 219-221 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have used linearly polarized 193-nm-excimer laser irradiation to create polarization-induced birefringence in silica. We have observed the polarization-induced birefringence irrespective of whether the sample undergoes net compaction or expansion. The sign of the birefringence is dependent on whether the glass is expanding or compacting. It is suggested that the birefringence derives from an anisotropic density change effected by the linearly polarized exposure. This effect can be expressed formally as an optical frequency-induced dc electrostriction. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1433902
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  • 7
    Electronic Resource
    Electronic Resource
    Excimer laser-induced expansion in hydrogen-loaded silica (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 2452-2454 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-purity silica that contains a high concentration of dissolved molecular hydrogen is found to undergo expansion, rather than densification, as a consequence of exposure to deep ultraviolet irradiation. Concurrent with the decreased density, we suggest that a positive photorefractive effect occurs, which increases the index. The contributions of the density change and the photorefractive effect can be observed by comparison of the birefringence and the wave front change obtained through interferometry. Expansion and the photorefractive effect are interpreted in terms of the photolytic formation of SiOH. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1368186
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  • 8
    Electronic Resource
    Electronic Resource
    Enhancement of optical nonlinearity of heavy-metal oxide glasses by replacing lead and bismuth with thallium (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2630-2632 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the results of degenerate four-wave mixing experiments at a wavelength of 1.06 μm on a number of heavy-metal gallate glasses. The replacement of lead (Pb) and/or bismuth (Bi) by thallium (Tl) leads to an enhancement of the optical nonlinearity, resulting in the largest nonresonant electronic nonlinearity yet reported for an oxide glass. χ(3) is proportional to the concentration of Tl; samples with more than 25 cation % Tl have χ(3) larger than that of carbon disulfide (CS2). The optical nonlinearity has an off-resonant electronic origin, which is confirmed by measurements of the diagonal and off-diagonal components of the χ(3) tensor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110403
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  • 9
    Electronic Resource
    Electronic Resource
    Two-dimensional small-angle X-ray scattering investigation of stretched borosilicate glasses. Erratum (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 30 (1997), S. 1159-1159 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Printer's errors in the paper by Polizzi, Riello, Fagherazzi, Bark & Borrelli [J. Appl. Cryst. (1997). 30, 487–494] are corrected. In the Abstract, the value of the average of the volumetric particle distribution was given incorrectly as 22 × 70 nm. The correct value is 22 × 370 nm. In §5.1 on p. 491, the size of the particles whose dimensions are very close to the volumetric average obtained by the fitting method was given incorrectly as 22 × 80 nm. The correct value is 22 × 380 nm. In §5.2 on p. 491, the unit-cell edge of Ag determined was given incorrectly as 4.709 (6) Å. The correct value is 4.079 (6) Å. The TEM micrographs of Figs. 2 and 6 were transposed. These figures are printed correctly below.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889898000818
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  • 10
    Electronic Resource
    Electronic Resource
    Two-Dimensional Small-Angle X-ray Scattering Investigation of Stretched Borosilicate Glasses (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 30 (1997), S. 487-494 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A two-dimensional fit of a suitable model for interpreting small-angle X-ray scattering (SAXS) has been shown to be a valuable tool in obtaining quantitative microstructural information. The model is based on the hypothesis that dilute ellipsoidal particles are arranged parallel to each other. The method has been applied to two glasses containing oriented particles. The investigated materials are both alkali aluminoborosilicate glasses, thermally treated and redrawn at a temperature above their softening point. The Ag(Cl, Br) crystalline droplets, formed during the preliminary thermal treatment, assume, after drawing, a cigar-like shape, oriented in the stretching direction, and give the material birefringence properties. The volumetric particle distribution has an average of 22 × 70 nm and is skewed up to length values of about 1200 nm. The composition of the solid solution, determined by X-ray diffraction (XRD), is Ag(Cl0.35, Br0.65). When the Ag(Cl, Br) particles on the surface are chemically reduced to Ag, a material with polarizing properties is obtained (PolarcorTM). For this sample, two distributions of particles have been found: one with an average of 18 x 230 nm and skewed up to 600 nm, and one, very sharp, of much shorter particles (14 × 30 nm).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889897001696
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