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Di Falco, Andrea
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2021Effective permittivity of co-evaporated metal-organic mixed filmscitations
- 2017Enhanced nonlinear effects in pulse propagation through epsilon-near-zero mediacitations
- 2017Enhanced nonlinear refractive index in ε-near-zero materialscitations
- 2016Enhanced nonlinear refractive index in ε -near-zero materialscitations
- 2016Optically induced metal-to-dielectric transition in Epsilon-Near-Zero metamaterialscitations
- 2016Optothermal nonlinearity of silica aerogelcitations
- 2016Enhanced nonlinear effects in pulse propagation through epsilon-near-zero mediacitations
- 2014Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequenciescitations
- 2011Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequenciescitations
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document
Optothermal nonlinearity of silica aerogel
Abstract
We report on the characterization of silica aerogel thermal optical nonlinearity, obtained by z-scan technique. The results show that typical silica aerogels have nonlinear optical coefficient similar to that of glass $( 10^{-12} $m$^2/$W), with negligible optical nonlinear absorption. The non\-li\-near coefficient can be increased to values in the range of $10^{-10} $m$^2/$W by embedding an absorbing dye in the aerogel. This value is one order of magnitude higher than that observed in the pure dye and in typical highly nonlinear materials like liquid crystals. ; Comment: 5 pages, 5 figures, Published by AIP Publishing