Design and fabrication of mechanochromic photonic crystals as strain sensor

A. Chiappini, A. Piotrowska, M. Marciniak, M. Ferrari, D. Zonta

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

11 Citations (Scopus)

Abstract

A photonic crystal (PhC) is a periodic structure with periodicity comparable with the wavelength of light, having a photonic band gap in the visible range. In this contribution we discuss the possible use of PhCs as strain sensors, based on the observation that a distortion in the crystal structure produces a change in the reflected bandwidth. First, we demonstrate the feasible fabrication of a PhC having sub-micrometric polystyrene colloidal spheres in a PDMS matrix on a rubber substrate, and we demonstrate that the photonic properties change with substrate elongation according to theoretical prediction. The crystal sensitivity to strain depends directly on interplanar spacing and on Poisson's ratio. To enhance the crystal strain resolution, we propose to fabricate inverse photonic crystals with FCC structure, which are known from the literature to exhibit a high negative Poisson's ratio. We carried out a theoretical investigation to predict the opto-mechanical response of inverse PhCs, and carried out preliminary tests to demonstrate their fabrication feasibility.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsJerome P. Lynch
Volume9435
DOIs
Publication statusPublished - 2015
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015 - San Diego, United States
Duration: 9 Mar 201512 Mar 2015

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015
CountryUnited States
CitySan Diego
Period9/03/1512/03/15

Keywords

  • auxetic material
  • colloidal crystal
  • inverse crystal
  • photonic crystals
  • refractive index
  • strain sensors

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  • Cite this

    Chiappini, A., Piotrowska, A., Marciniak, M., Ferrari, M., & Zonta, D. (2015). Design and fabrication of mechanochromic photonic crystals as strain sensor. In J. P. Lynch (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9435). [94350J] https://doi.org/10.1117/12.2086281