Near-infrared scattering effects of mesoporous TiO2 analyzed by optical coherence tomography

Ling-Hsuan Tsai; Po Nien Yang; Hoang Yan Lin

doi:10.1117/12.2227760

27 April 2016 Near-infrared scattering effects of mesoporous TiO₂ analyzed by optical coherence tomography

Ling-Hsuan Tsai, Po Nien Yang, Hoang Yan Lin

Proceedings Volume 9887, Biophotonics: Photonic Solutions for Better Health Care V; 988737 (2016) https://doi.org/10.1117/12.2227760
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

Optical properties of mesoporous TiO₂ scatters with average diameters of 20 nm, 150 nm, 300 nm, and 500 nm are measured by optical coherence tomography system at the wavelength of 853 nm. The scattering coefficient can be estimated by utilizing the extend Huygens Fresnel theory with consideration of single and multiple scattering effects, and the g factors are calculated based on the Mie scattering model. After fitting algorithm, by increasing the sizes of mesoporous TiO₂ scatters from 20, 150, 300, to 500 nm, the scattering coefficient could also be extracted as from 13.5±0.6, 16.5±0.6, to 20.2±0.6 mm-1, and then decreased to 18.5±0.6 mm^-1, which are accompanied with the enhancement of multiple-scattering contribution from 5%, 10%, to 40%, and then decreased to 20%, respectively.

Citation Download Citation

Ling-Hsuan Tsai, Po Nien Yang, and Hoang Yan Lin "Near-infrared scattering effects of mesoporous TiO₂ analyzed by optical coherence tomography", Proc. SPIE 9887, Biophotonics: Photonic Solutions for Better Health Care V, 988737 (27 April 2016); https://doi.org/10.1117/12.2227760

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KEYWORDS

Titanium dioxide

Scattering

Mie scattering

Optical coherence tomography

Multiple scattering

Anisotropy

Finite-difference time-domain method

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