Work

Boosting Optical Nanocavity Coupling by Retardation Matching to Dark Modes

Year: 2023

Type: article

Abstract: Plasmonic nanoantennas can focus light at nanometer length scales providing intense field enhancements. For the tightest optical confinements (0.5-5 nm) achieved in plasmonic gaps, the gap spacing, refractive index, and facet width play a dominant role in determining the optical properties making tuning through antenna shape challenging. We show here that controlling the surrounding refractive index instead allows both efficient frequency tuning and enhanced in-/output coupling through retardation matching as this allows dark modes to become optically active, improving widespread functionalities.

Source: ACS Photonics

DOI: 10.1021/acsphotonics.2c01603

Authors: Rohit Chikkaraddy, Junyang Huang, Dean Kos, Eoin Elliott, Marlous Kamp, Chenyang Guo, Jeremy J. Baumberg, Bart de Nijs

Institution: University of Cambridge

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,000

Funders: Royal Society, Engineering and Physical Sciences Research Council, Trinity College, University of Cambridge, H2020 European Research Council

Awards: G1099763185, EPSRC Centre for Doctoral Training in Integrated Functional Nano (i4Nano), G4282222502, Pico-Photonic Forces at the Atomic Scale, G4545619185, G5507171923, AirGuide Photonics, G6051805555, Nano-Optics to controlled Nano-Chemistry Programme Grant (NOtCH), EPSRC Centre for Doctoral Training in Sustainable and Functional Nano, G7402191491, G7707145192

OpenAlex ID: W4315645786

FWCI: 1.346

Cites: 38

Cited by: 13

Related to: 10