Plasmon lattice resonances induced by an all-dielectric periodic array of Si nanopillars on SiO₂ nanopillars

Abstract

An all-dielectric periodic array is proposed to form plasmon lattice resonances (PLR). In the array, Si nanopillars are on top of SiO 2 nanopillars, and SiO 2 nanopillars are on top of quartz substrates. The simulated results show that the line-width of the PLR can be as small as 3.3 nm. This can be attributed to the coupling between the Mie resonances of Si nanopillars and the diffracted waves. While the PLR can't be formed by the periodic Si nanopillar array directly sitting on quartz substrates. The diameter and height of Si nanopillars, the period of the array and the height of SiO 2 nanopillars have significant impacts on the PLR. This work extends the application of PLR.

Design and Characterization of ITO-Covered Resonant Nanopillars for Dual Optical and Electrochemical Sensing

“…The application of devices for biological and chemical sensing by optical measurements has witnessed an extraordinary growth in different directions, demonstrating the importance and flexibility of this increasingly evolving sector [1][2][3][4]. Of all available options, the implementation of sensors with specific micro-and nano-structured morphologies in the form of periodic arrays [5,6] has allowed a precise optical response, which can be tailored relying on both a smart shaping and size selection of the nanostructures (diameter, pitch, thickness) and the adequate selection of the materials integrated in such structures. Optical biosensors based on nanopillars [5][6][7] are a good option in this area because they provide a straightforward interrogation at normal incidence and high sensitivity due to a larger contact surface area with the medium, compared with flat sensors.…”

“…Of all available options, the implementation of sensors with specific micro-and nano-structured morphologies in the form of periodic arrays [5,6] has allowed a precise optical response, which can be tailored relying on both a smart shaping and size selection of the nanostructures (diameter, pitch, thickness) and the adequate selection of the materials integrated in such structures. Optical biosensors based on nanopillars [5][6][7] are a good option in this area because they provide a straightforward interrogation at normal incidence and high sensitivity due to a larger contact surface area with the medium, compared with flat sensors. An advanced and highly performant version of said configuration, developed by Hernández et al, consisted of resonant nanopillars (R-NPs) arrays [8].…”