Variation with Temperature of the Photoelastic Constants of Sodium Chloride

Rao, K. V. S. Rama; Murty, V. G. Krishna

doi:10.1038/190429a0

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…The refractive index of the as-deposited film increases from 1.778 to 1.961 (at l=650 nm) as deposition temperature increases from 560 to 650°C. The dependence of the refractive index on substrate temperature is agreeable with those normally observed in many oxides [11][12][13]. The refractive index of the films increases with the substrate temperature increasing, which may be attributed to an increase in packing density, crystallization, and also to the oxygen deficiency.…”

Section: Resultssupporting

confidence: 70%

Optical properties of RF-sputtered Ba0.65Sr0.35TiO3 thin films

Zhang

et al. 2007

J Electroceram

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Ba 0.65 Sr 0.35 TiO 3 (BST) thin films have been prepared by radio frequency magnetron sputtering on fused quartz at different substrate temperatures. Optical constants (refractive index n, extinction coefficient k) were determined from the optical transmittance spectra using the envelope method. The dispersion relationship of the refractive index vs. substrate temperature was also investigated. The refractive index of BST thin films increased from 1.778 to 1.961 (at l=650 nm) as deposited temperature increases from 560°C to 650°C. The extinction coefficient of asdeposited BST thin films increased with the increase of the oxygen-to-argon ratio, which was due to the change of the film stoichiometry, structure, and texture of BST thin films. The oxygen-to-argon ratio also affected the fluorescence spectra. The fluorescence peaks intensity was greatly increased, apparent frequency shift was detected, and the linewidth became narrow as the ratio of oxygen to argon increased from 1:4 to 1:1. The fluorescence spectra also indicated the band transition of BST thin films was an indirect gap transition.

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Section: Resultssupporting

confidence: 70%