Physical and Optical Properties of CeO2 BaO B2O3 Glasses
Issue:
Volume 6, Issue 2, December 2017
Pages:
17-20
Received:
29 November 2017
Accepted:
8 December 2017
Published:
10 January 2018
Abstract: The influence of compositional variations on the physical properties such as density, molar volume, optical electronegativity, optical energy gap, refractive index, optical basicity, oxide ion polarizability, molar refraction, third order nonlinear susceptibility, non linear refractive index and metallization with the variation in CeO2 content has been studied theoretically for x CeO2 (20-x) BaO 80B2O3, where (x = 0, 2, 4, 6, 8 and 10) and analyzed the physical parameters related to these compositions with theoretical predictions.
Abstract: The influence of compositional variations on the physical properties such as density, molar volume, optical electronegativity, optical energy gap, refractive index, optical basicity, oxide ion polarizability, molar refraction, third order nonlinear susceptibility, non linear refractive index and metallization with the variation in CeO2 content has ...
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The Sensing Characteristics of a Bragg Fiber Based Plasmonic Biosensor Using an As2S3 Chalcogenide Layer
Vasile Popescu,
Niculae Puscas,
Guido Perrone
Issue:
Volume 6, Issue 2, December 2017
Pages:
21-27
Received:
7 December 2017
Accepted:
18 December 2017
Published:
10 January 2018
Abstract: The sensing performances of a four layer Bragg fiber based plasmonic biosensor for aqueous solutions using an As2S3 chalcogenide layer are investigated with an analytical method. In comparison with a previously considered fiber structure with a GaP layer, the new geometry has the advantages of a smaller value of the full width at half maximum and a larger value of the signal-to-noise ratio; however, the maximum of amplitude sensitivity is smaller when an As2S3 layer is used in the place of the GaP layer. If the thickness of the As2S3 layer is increased to the value for which it is quarter wavelength, the power fraction carried at the resonant wavelength by the core guided mode in the analyte layer becomes comparable with the value obtained in an optical fiber with the GaP layer, evidencing that the higher value of the refractive index for the GaP layer is compensated by a larger value of the thickness for the As2S3 layer. Taking into account the 0.04 photoinduced refractive index change obtained by illumination the chalcogenide As2S3 layer with a laser beam, the resonant wavelength is decreased by 0.128 nm and the loss for the core mode is increased by 41dB/cm.
Abstract: The sensing performances of a four layer Bragg fiber based plasmonic biosensor for aqueous solutions using an As2S3 chalcogenide layer are investigated with an analytical method. In comparison with a previously considered fiber structure with a GaP layer, the new geometry has the advantages of a smaller value of the full width at half maximum and a...
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