Photonic crystal slab sensor with enhanced surface area.

Kang C, Phare CT, Vlasov YA, Assefa S, Weiss SM
Opt Express. 2010 18 (26): 27930-7

PMID: 21197066 · DOI:10.1364/OE.18.027930

In this work, we demonstrate improved molecular detection sensitivity for silicon slab photonic crystal cavities by introducing multiple-hole defects (MHDs), which increase the surface area available for label-free detection without degrading the quality factor. Compared to photonic crystals with L3 defects, adding MHDs into photonic crystal cavities enabled a 44% increase in detection sensitivity towards small refractive index perturbations due to surface monolayer attachment of a small aminosilane molecule. Also, photonic crystals with MHDs exhibited 18% higher detection sensitivity for bulk refractive index changes.

MeSH Terms (6)

Equipment Design Equipment Failure Analysis Photons Refractometry Silanes Transducers

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