Finite Difference Analysis and Experimental Validation of 3D Photonic Crystals for Structural Health Monitoring

verfasst von

Valentina Piccolo, Andrea Chiappini, Alessandro Vaccari, Antonino Calà Lesina, Maurizio Ferrari, Luca Deseri, Marcus Perry, Daniele Zonta

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.

Externe Organisation(en)

Università degli Studi di Trento
University of Pittsburgh
Consiglio Nazionale delle Ricerche (CNR)
Fondazione Bruno Kessler
University of Ottawa
Brunel University
Carnegie Mellon University
Houston Methodist Hospital
University of Strathclyde

Typ

Aufsatz in Konferenzband

Publikationsdatum

12.04.2017

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Angewandte Informatik, Angewandte Mathematik, Elektrotechnik und Elektronik

Elektronische Version(en)

https://doi.org/10.1117/12.2263975 (Zugang: Unbekannt)