10 September 2014 Block copolymer assisted refractive index engineering of metal oxides for applications in optical sensing
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Abstract
We demonstrate that the refractive indices of important functional metal oxides (TiO2, SnO2, and ZnO) can be engineered “at will” for applications in photonics engineering. The tailoring of the refractive indices is accomplished by 3D nanostructuring in the sub-wavelength regime (50nm or less) using the method of block-copolymer templating combined with a low cost solution processing approach. Using this method, the index of refraction of the demonstrated metal oxides and their doped variants can be engineered to be as low as 1.25. We will present both numerical simulations and experimental data demonstrating the unrestricted integration of functional metal oxides with a D-shaped optical fiber for applications in chemical and biological sensing. Using the developed refractive index engineering scheme, we introduce a novel hydrogen sensor by integrating a palladium doped TiO2 nanomaterial with D-shaped optical fiber and provide sensor characterization up to 700°C for applications in the energy sector.
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Zsolt L. Poole, Zsolt L. Poole, Paul Ohodnicki, Paul Ohodnicki, Michael Buric, Michael Buric, Aidong Yan, Aidong Yan, Shaymaa Riyadh, Shaymaa Riyadh, Yuankun Lin, Yuankun Lin, Kevin P. Chen, Kevin P. Chen, } "Block copolymer assisted refractive index engineering of metal oxides for applications in optical sensing", Proc. SPIE 9161, Nanophotonic Materials XI, 91610P (10 September 2014); doi: 10.1117/12.2062092; https://doi.org/10.1117/12.2062092
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