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Proceedings Paper

Wireless enabled multi gas sensor system based on photonic crystals
Author(s): Hazem Awad; Imad Hasan; K. Mnaymneh; Sawsan Majid; Trevor J. Hall; Ivan Andonovic
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Paper Abstract

In this paper we introduce a multi gas sensor system based on refractive index changes in a 2D slab photonic crystal. The sensor is formed by a L3 resonant cavity sandwiched between two W1.06 waveguides in the photonic crystal. The sensor configuration is similar to an Add-Drop filter structure. The transmission spectrums of the sensor with different ambient refractive indices ranging from n = 1.0 to n = 1.1 are calculated. The simulation results show that a change in ambient RI of Δn = 0.0008 is apparent with a corresponding change in output wavelength of the sensor of 2.4 nm. The properties of the sensor are simulated using the 3D finite-difference time-domain (FDTD) method. The Q-factor of the sensor is also optimized, with highest values reaching over 30,000. The sensor system is hybrid integrated with a wireless RF chip which processes the sensor data and transmits them in effect turning the entire system into a wireless sensor mote.

Paper Details

Date Published: 13 May 2010
PDF: 7 pages
Proc. SPIE 7726, Optical Sensing and Detection, 77260K (13 May 2010); doi: 10.1117/12.854841
Show Author Affiliations
Hazem Awad, Univ. of Ottawa (Canada)
Univ. of Strathclyde (United Kingdom)
Imad Hasan, Univ. of Ottawa (Canada)
K. Mnaymneh, National Research Council Canada (Canada)
Sawsan Majid, Univ. of Ottawa (Canada)
Trevor J. Hall, Univ. of Ottawa (Canada)
Ivan Andonovic, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 7726:
Optical Sensing and Detection
Francis Berghmans; Anna Grazia Mignani; Chris A. van Hoof, Editor(s)

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