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Optofluidic sensor using two-dimensional photonic crystal waveguides

Published online by Cambridge University Press:  20 March 2013

Faida Bougriou ,
Touraya Bouchemat ,
Mohamed Bouchemat  and
Nicole Paraire
Faida Bougriou*
Affiliation:
Electronics Department, Mentouri University of Constantine, 25000 Constantine, Algeria
Touraya Bouchemat
Affiliation:
Electronics Department, Mentouri University of Constantine, 25000 Constantine, Algeria
Mohamed Bouchemat
Affiliation:
Electronics Department, Mentouri University of Constantine, 25000 Constantine, Algeria
Nicole Paraire
Affiliation:
University of Paris Sud, IEF-UMR 8622, 91405 Orsay Cedex, France
*
ae-mail: bougrioufaida@yahoo.fr
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Abstract

Photonic crystal (PC) waveguide is one class of PC devices that has been demonstrated for RI measurements. In this paper, we have reported a new design of infiltrated optofluidic sensors based on 2D photonic crystal slab with triangular lattice pattern of ring-shaped holes. The properties of the sensor are simulated using the finite-difference time-domain (FDTD) method. The transmission spectra have been measured by changing the refractive index of holes and it has been found that with increasing refractive index, wavelength position of transmission spectrum shifts. The radius and the shape of the air holes localized at each side of the line defect are optimized to realize high sensitivity, wide measurement range and improved transmission. An improved optofluidic sensor design is also described and a 210 nm wavelength position of upper band edge shift was observed corresponding to a sensitivity of more than 636 nm per refractive index unit (RIU).

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 62 , Issue 1 , April 2013 , 11201
Copyright
© EDP Sciences, 2013

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