Share Email Print
cover

Proceedings Paper

Design and fabrication of mechanochromic photonic crystals as strain sensor
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 3 April 2015
PDF: 13 pages
Proc. SPIE 9435, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015, 94350J (3 April 2015); doi: 10.1117/12.2086281
Show Author Affiliations
A. Chiappini, CSMFO Lab., CNR-IFN (Italy)
A. Piotrowska, CSMFO Lab., CNR-IFN (Italy)
Univ. degli Studi di Trento (Italy)
M. Marciniak, National Institute of Telecommunications (Poland)
M. Ferrari, CSMFO Lab., CNR-IFN (Italy)
D. Zonta, CSMFO Lab., CNR-IFN (Italy)
Univ. degli Studi di Trento (Italy)


Published in SPIE Proceedings Vol. 9435:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015
Jerome P. Lynch, Editor(s)

© SPIE. Terms of Use
Back to Top