Inverse design of nanoparticles for enhanced Raman scattering
Abstract
We show that topology optimization (TO) of metallic resonators can lead to ∼102 × improvement in surface-enhanced Raman scattering (SERS) efficiency compared to traditional resonant structures such as bowtie antennas. TO inverse design leads to surprising structures very different from conventional designs, which simultaneously optimize focusing of the incident wave and emission from the Raman dipole. We consider isolated metallic particles as well as more complicated configurations such as periodic surfaces or resonators coupled to dielectric waveguides, and the benefits of TO are even greater in the latter case. Our results are motivated by recent rigorous upper bounds to Raman scattering enhancement, and shed light on the extent to which these bounds are achievable.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 03, 2020
- Source ID
- 10.1364/oe.28.004444
Entities
People
- Jérôme Michon
- Mohammed Benzaouia
- Ole Sigmund
- Rasmus E Christiansen
- Steven G. Johnson
Organizations
- Army Research Office
- National Science Foundation
- Villum Foundation