@inproceedings{712da47f767c47c2830b2aa33fd9c3c5,
title = "Finite difference analysis and experimental validation of 3D photonic crystals for structural health monitoring",
abstract = "In this work, we validate the behavior of 3D Photonic Crystals for Structural Health Monitoring applications. A Finite Difference Time Domain (FDTD) analysis has been performed and compared to experimental data. We demonstrate that the photonic properties of a crystal (comprised of sub-micrometric polystyrene colloidal spheres embedded in a PDMS matrix) change as a function of the axial strain applied to a rubber substrate. The change in the reflected wavelength, detected through our laboratory experiments and equivalent to a visible change in crystal color, is assumed to be caused by changes in the interplanar spacing of the polystyrene beads. This behavior is captured by our full wave 3D FDTD model. This contains different wavelengths in the visible spectrum and the wave amplitudes of the reflected and transmitted secondary beams are then computed. A change in the reflectance or transmittance is observed at every programmed step in which we vary the distance between the spheres. These investigations are an important tool to predict, study and validate our understanding of the behavior of this highly complex physical system. In this context, we have developed a versatile and robust parallelized code, able to numerically model the interaction of light with matter, by directly solving Maxwell's equations in their strong form. The ability to describe the physical behavior of such systems is an important and fundamental capability which will aid the design and validation of innovative photonic sensors.",
keywords = "structural health monitoring, photonic crystals, crystals, finite-difference time-domain method, light-matter interactions, matrices, transmittance, visible radiance, maxwell equations, reflectivity",
author = "Valentina Piccolo and Andrea Chiappini and Alessandro Vaccari and Lesina, {Antonino Cal{\`a}} and Maurizio Ferrari and Luca Deseri and Marcus Perry and Daniele Zonta",
note = "Piccolo, V., Chiappini, A., Vaccari, A., Lesina, A. C., Ferrari, M., Deseri, L., ... Zonta, D. (2017). {"}Finite difference analysis and experimental validation of 3D photonic crystals for structural health monitoring{"}, In Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017, J. P. Lynch (Ed.), Proceedings of SPIE Vol. 10168, 101681E 2017. Copyright 2017 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. https://doi.org/10.1117/12.2263975; Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017 ; Conference date: 25-03-2017 Through 25-03-2017",
year = "2017",
month = apr,
day = "12",
doi = "10.1117/12.2263975",
language = "English",
isbn = "9781510608214",
series = "Proceedings of SPIE",
publisher = "Society of Photo-Optical Instrumentation Engineers",
editor = "Lynch, {Jerome P.}",
booktitle = "Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017",
}