Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

1.1 MATHEMATICS, 1.3 PHYSICAL SCIENCES

Publication Details

Optical Materials 34 (2012) 1366–1370

Abstract

This study reports on the first development of high refractive index thin film materials processed at temperatures not greater than 100 degrees celsius. Three materials were synthesised by the sol–gel technique, each employing different transition metal precursors (niobium, tantalum and vanadium alkoxides). The optical properties of these materials were characterised by ellipsometry and the propagation losses at 638 nm were measured by the prism coupling method. It is shown that refractive indices as high as 1.870, 2.039 and 2.308 are obtained from niobium-, tantalum- and vanadium-based materials respectively, attributed to the influence of the transition metal atomic size on the condensation reactions.

DOI

https://doi.org/10.1016/j.optmat.2012.02.023

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