Photonic crystal slab sensor with enhanced surface area

• DOI: 10.1364/oe.18.027930
• Publication Date: 2010-12-17T21:31:47Z
• Authors: Christopher Kang; Christopher T. Phare; Yurii A. Vlasov; Solomon Assefa; Sharon M. Weiss
• Keywords: Slab

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 label-free without degrading quality factor. Compared to crystals with L3 defects, adding MHDs into enabled a 44% in towards small refractive index perturbations due monolayer attachment of aminosilane molecule. Also, exhibited 18% higher bulk changes.