Abstract
This paper presents a theoretical study on a novel chemical sensor platform based
on a 2-D photonic crystal with negative refraction (PCNR). The proposed device consists
of distributed multinanocavities embedded within the PCNR. A 2-D finite-difference
time-domain method with perfectly matched layers has been employed to investigate the
performance of the sensor for different analytes and structural parameters. The
calculations show that it is possible to detect simultaneously two analytes when the
refractive index is larger than that of water. The quality factor was determined to be
around 105 when the radii of the central nanocavity is <i>r</i><sub>1</sub> =
0.225<i>a</i> and that of the external is <i>r</i><sub>2</sub> = 0.0215<i>a</i>.
© 2012 IEEE
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