Designing Structures that Maximize Spatially Averaged Surface-Enhanced Raman Spectra
Optics
2023-02-02 v1
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 times better than coating with optimized spheres or bowtie structures and about 20 times better when the nonlinear damage effects are included.
Cite
@article{arxiv.2208.00960,
title = {Designing Structures that Maximize Spatially Averaged Surface-Enhanced Raman Spectra},
author = {Wenjie Yao and Francesc Verdugo and Henry O. Everitt and Rasmus E. Christiansen and Steven G. Johnson},
journal= {arXiv preprint arXiv:2208.00960},
year = {2023}
}