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12 February 2007 Sensitivity analysis of a photonic crystal structure for index-of-refraction sensing
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We present the optical characterization of an all-dielectric photonic crystal (PC)-based guided resonance filter sensitive to index-of-refraction changes in aqueous solutions. Spectral peak width was found to be 9.8 and 4.4 nm around 816 nm (water media), corresponding to a quality factor Q of 83 and 181, respectively. A spectral shift of peak wavelength with index change of 130 nm/RIU was observed for bulk fluid experiments. Measured peak shift (&Dgr;&lgr;=0.2nm) corresponds to a detectable index change &Dgr;n=1.5×10-3.
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Ofer Levi, Meredith M. Lee, Jingyu Zhang, Virginie Lousse, Steven R. J. Brueck, Shanhui Fan, and James S. Harris "Sensitivity analysis of a photonic crystal structure for index-of-refraction sensing", Proc. SPIE 6447, Nanoscale Imaging, Spectroscopy, Sensing, and Actuation for Biomedical Applications IV, 64470P (12 February 2007); doi: 10.1117/12.705670;

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