ArticleNanomaterials (Basel, Switzerland)2023
A Design Strategy for Surface Nanostructures to Realize Sensitive Refractive-Index Optical Sensors.
Article in Nanomaterials (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Functional Nanomaterials for Sensing and Detection (2nd Edition).Nanomaterials (Basel, Switzerland) · 2025Article
- Productive biosensing techniques empowered by all-dielectric metasurfaces.Frontiers in bioengineering and biotechnology · 2024Article
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Abstract
Refractive-index optical sensors have been extensively studied. Originally, they were surface plasmon resonance sensors using only a flat gold film. Currently, to develop practically useful label-free optical sensors, numerous proposals for refractive index sensors have been made using various nanostructures composed of metals and dielectrics. In this study, we explored a rational design strategy for sensors using surface nanostructures comprising metals or dielectrics. Optical responses, such as reflection and transmission, and resonant electromagnetic fields were computed using a numerical method of rigorous coupled-wave analysis combined with a scattering-matrix algorithm. As a result, good performance that almost reached the physical limit was achieved using a plasmonic surface lattice structure. Furthermore, to precisely trace the refractive-index change, a scheme using two physical quantities, resonant wavelength and reflection amplitude, was found to be valid for a 2D silicon metasurface.
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