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Proceedings Paper

Photonic crystal sensor systems for sub-micron damage detection, quantification, and diagnosis
Author(s): I. El-Kady; M. F. Su; J. C. Verley; M. M. Reda Taha; T. Khraishi
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Paper Abstract

Photonic crystals (PC) are artificially fabricated crystals with a periodicity in the dielectric function. These crystals have the novel ability to mold and control light in three dimensions by opening a frequency region (bandgap) in which light is forbidden to propagate. We demonstrate using a simulation model that a photonic crystal sensor attached to a composite substrate will experience a significant change in its bandgap profile when damage is induced in the composite substrate. The frequency response of the photonic crystal sensor is modeled using the finite difference time domain (FDTD) method. A damage metric using principles of fuzzy pattern recognition is developed to evaluate and quantify the change in the frequency response in relation to the induced damage. Results for different damage scenarios are examined and reported with significantly high success rate. Successful developments of photonic crystal sensors will allow damage identification at scales not attainable using current sensing technologies.

Paper Details

Date Published: 31 March 2006
PDF: 7 pages
Proc. SPIE 6172, Smart Structures and Materials 2006: Smart Electronics, MEMS, BioMEMS, and Nanotechnology, 61720V (31 March 2006); doi: 10.1117/12.658578
Show Author Affiliations
I. El-Kady, Sandia National Labs. (United States)
Univ. of New Mexico (United States)
M. F. Su, Univ. of New Mexico (United States)
J. C. Verley, Sandia National Labs. (United States)
M. M. Reda Taha, Univ. of New Mexico (United States)
T. Khraishi, Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 6172:
Smart Structures and Materials 2006: Smart Electronics, MEMS, BioMEMS, and Nanotechnology
Vijay K. Varadan, Editor(s)

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