The scattering of light was long thought to prevent imaging through opaque materials. However, scattering from static objects is deterministic, and in the last 15 years, a series of pioneering studies have shown us that it is possible to use a technique called wavefront shaping to characterise and subsequently cancel out complicated scattering effects. Light that has undergone multiple scattering can be ‘untangled’ to see through opaque media, such as frosted glass, biological tissue, or multimode optical fibres.
Chemical sensing based on Localized Surface Plasmonic Resonances (LSPR) and the ultra-sharp optical features of surface lattice resonances (SLR) of arrays of metallic nanoantennas have attracted much attention. Recently we studied biosensing based on the transition between LSPR and SLR (hybridization phase), demonstrating significantly higher refractive index sensitivity than each of these resonances individually. In this contribution we study the impact of size and shape of the metallic nanoantennas on the hybridization process and the way they influence application of this process for biosensing, wherein miniscule variation of the refractive index of the environment leads to dramatic changes in the spectral properties of the arrays.
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