Optimized Plasmonic Gold-Pillar Metasurfaces for Refractive-Index Sensing.

Liliana Valente, Dante M Aceti, Rossella Zaffino, Giovanna Palermo, Giuseppe Strangi

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Article in Nanomaterials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

5 authors.

Liliana ValenteNLHT-Lab, Department of Physics, University of Calabria and CNR-NANOTEC, Institute of Nanotechnology, 87036 Rende, Italy.ORCID 0009-0007-5765-7184

Dante M AcetiNLHT-Lab, Department of Physics, University of Calabria and CNR-NANOTEC, Institute of Nanotechnology, 87036 Rende, Italy.ORCID 0000-0003-0208-532X

Rossella ZaffinoICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Spain.ORCID 0000-0001-7574-5793

Giovanna PalermoNLHT-Lab, Department of Physics, University of Calabria and CNR-NANOTEC, Institute of Nanotechnology, 87036 Rende, Italy.ORCID 0000-0001-5649-735X

Giuseppe StrangiNLHT-Lab, Department of Physics, University of Calabria and CNR-NANOTEC, Institute of Nanotechnology, 87036 Rende, Italy.ORCID 0000-0002-7509-2048

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gold pillar-based plasmonic metasurfaces provide a robust platform for optical sensing owing to their strong localized surface plasmon resonances and tunable near-field distributions. In this work, we present a numerical investigation of a gold-pillar metasurface optimized specifically for high-performance refractive-index sensing. A comprehensive parametric optimization of the metasurface was carried out, including analyses of the inter-pillar gap, the thickness of the underlying gold film, and the optical response under varying angles of incidence. Numerical analysis demonstrates that the engineered plasmonic pillar array achieves a sensitivity of 500 nm/RIU and a Figure of Merit (FOM) of 79. These results demonstrate the potential of the proposed plasmonic metasurface as an optimized platform for high-performance refractive-index sensing, providing practical design guidelines for future chemical and biological sensing applications.

Indexed as

metasurfacesnear-field enhancementplasmonicsrefractive-index sensingsensing

Identifiers

PMID42506476

DOI10.3390/nano16140841

PMCPMC13416294

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.