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Broadband plasmonic resonances for surface-enhanced Raman spectroscopy

Abstract: This work introduces a broadband plasmonic metasurface designed for enhanced Surface Enhanced Raman Spectroscopy (SERS). By engineering an array of subwavelength metallic nanostructures, it supports multiple plasmonic modes that spatially overlap at both the pump and Stokes frequencies. The resulting broadband operation stems from the synergistic coupling of localized surface plasmons and lattice resonances, boosting the near-field intensity across a wide spectral range. With a 104-fold enhancement factor over a 200nm bandwidth, the device surpasses traditional single-resonance substrates and offers uniform signal reproducibility. This advance paves the way for versatile, highly sensitive molecular detection without stringent wavelength alignment, broadening SERS applications.

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Congress: Plasmonics: Design, Materials, Fabrication, Characterization, and Applications (23º : 2025 : San Diego, Estados Unidos)

Publisher: SPIE The International Society for Optical Engineering

Publication date: 16/09/2025

No. of pages: 6

Publication type: Conference object

DOI: 10.1117/12.3063808

ISSN: 0277-786X,1996-756X

Spanish project: TED2021-130378BC21

Publication Url: https://doi.org/10.1117/12.3063808

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Authorship

JOSÉ FRANCISCO ALGORRI GENARO

ZOGRAFOPOULOS, D.

ANDREA CUSANO

LUIS RODRIGUEZ COBO

ADOLFO COBO GARCIA

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