Plasmonic Nanostructure Lattices for High-Performance Sensing

摘要

Plasmonic nanostructures show great promise for sensing because theirnanoscale confined light fields are sensitive to the change in thesurroundings. Conventional plasmonic sensors based on surface plasmonpolaritons (SPPs) and localized surface plasmon resonances (LSPRs) haveinspired considerable progress in sensing but still suffer from an obliqueincidence or moderate sensitivity. This review focuses on how the rationaldesign of novel plasmonic nanostructures can enable high-performancesensing. Patterned nanostructures such as nanoparticle (NP) lattices tosupport surface lattice resonances (SLRs) and plasmonic nanogaps withnanogap modes are emerging to overcome the sensing limitations of SPP andLSPR. Moreover, hybrid nanostructures of plasmonic components withfunctional materials, such as metal-organic frameworks, 2D materials, oxides,and polymers, show opportunities to further improve sensitivity andselectivity. In addition, plasmonic nanolasing and resonance modes from newmaterials exhibit appealing features for sensing. It is expected that furtherstudies on plasmonic nanostructures with low-loss materials, chiralitycharacteristics, novel devices, and advanced fabrications will provide outlooksfor high-performance sensing.