Homogeneous and Significant Near‐Field Enhancement in All‐Dielectric Metasurfaces for Sensing Applications
Guangyuan Li,
Yunhui Liu
Abstract:All‐dielectric metasurfaces supporting high‐Q resonances have emerged as a promising platform for sensing applications. However, the greatly enhanced near‐fields are usually confined within the all‐dielectric nanostructures rather than the outside analyte region, severely limiting the bulk sensitivity and the biosensing performance. Here, a silicon metasurface formed by the hybridization of two lattices with a relative displacement is designed to support nonlocal quasi‐bound states in the continuum (q‐BICs) fe… Show more
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