Designing structures that maximize spatially averaged surface-enhanced Raman spectra

Wenjie Yao*, Francesc Verdugo, Henry O. Everitt, Rasmus E. Christiansen, Steven G. Johnson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

We present a general framework for inverse design of nanopatterned surfaces that maximize spatially averaged surface-enhanced Raman (SERS) spectra from molecules distributed randomly throughout a material or fluid, building upon a recently proposed trace formulation for optimizing incoherent emission. This leads to radically different designs than optimizing SERS emission at a single known location, as we illustrate using several 2D design problems addressing effects of hot-spot density, angular selectivity, and nonlinear damage. We obtain optimized structures that perform about 4 × better than coating with optimized spheres or bowtie structures and about 20 × better when the nonlinear damage effects are included.

Original languageEnglish
JournalOptics Express
Volume31
Issue number3
Pages (from-to)4964-4977
ISSN1094-4087
DOIs
Publication statusPublished - 2023

Bibliographical note

Please note erratum: https://doi.org/10.1364/OE.547559

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