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 language | English |
---|---|
Journal | Optics Express |
Volume | 31 |
Issue number | 3 |
Pages (from-to) | 4964-4977 |
ISSN | 1094-4087 |
DOIs | |
Publication status | Published - 2023 |