Induced changes in refractive index, optical band gap, and absorption edge of polycarbonate-SiO2  thin films by Vis-IR lasers

Hassan Ehsani; Somaieh Akhoondi

doi:10.1117/12.2237037

15 September 2016 Induced changes in refractive index, optical band gap, and absorption edge of polycarbonate-SiO₂ thin films by Vis-IR lasers

Hassan Ehsani, Somaieh Akhoondi

Author Affiliations +

Proceedings Volume 9927, Nanoengineering: Fabrication, Properties, Optics, and Devices XIII; 99271S (2016) https://doi.org/10.1117/12.2237037
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

In this experimental work, we have studied induced changes in refractive index, extinction coefficient, and optical band-gap of Bisphenol-A-polycarbonate (BPA-PC) coated with a uniform and thin, anti-scratch SiO₂ film irradiated by visible to near-infrared lasers at 532 nm (green),650 nm(red), and 980 nm (IR)wavelength lasers with different energy densities. Our lasers sources are indium-gallium-aluminum-phosphide, second harmonic of neodymium-YAG-solid state lasers and gallium-aluminum-arsenide-semiconductor laser. The energy densities of our sources have been changed by changing the spot size of incident laser. samples transmission spectra were monitored by carry500 spectrophotometer and induced changes in optical properties are evaluated by using, extrapolation of the transmission spectrum through Swanepoel method and computer application

Citation Download Citation

Hassan Ehsani and Somaieh Akhoondi "Induced changes in refractive index, optical band gap, and absorption edge of polycarbonate-SiO₂ thin films by Vis-IR lasers", Proc. SPIE 9927, Nanoengineering: Fabrication, Properties, Optics, and Devices XIII, 99271S (15 September 2016); https://doi.org/10.1117/12.2237037

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KEYWORDS

Refractive index

Absorption

Transmittance

Thin films

Dispersion

Laser energy

Coating

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