Abstract
Tweaking the shape, size, and material of metallic nanostructure enables researchers to engineer the scattering properties. In particular, by breaking the symmetry of the nanostructures, additional degrees of freedom to manipulate the optical properties can be obtained. In this work, we fabricate a novel large-area plasmonic cone-shell crystal (PCSC) via two-process physical deposition of dielectric and metallic materials on the self-assembled monolayer colloidal crystal (CC). In comparison with the enhanced optical transmission (EOT) spectrum of the conventional plasmonic semi-shell array, multiple plasmon resonances within a remarkably broadened spectrum are observed in this PCSC, which are the main results of the plasmon coupling and hybridization effects based on the increased symmetry-breaking structure. Our findings could develop the investigation on the plasmonic shell structures and hold potential applications in light modulation, surface-enhanced spectroscopy and optoelectronic detection.
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