Work

Fano plasmonics goes nonlinear

Year: 2022

Type: article

Abstract: We investigate the process of the second harmonic generation by plasmonic nano-antennas that exhibit Fano-like resonances. A rigorous fully vectorial Maxwell-hydrodynamics approach is employed to directly calculate the second order susceptibilities as a function of the pump frequency, considering a periodic array of nanodolmens comprised of three Au nanorods. The results of the numerical simulations demonstrate a noticeable enhancement of the second harmonic efficiency by the antisymmetric mode. Additionally, a simple analytical model based on two coupled nonlinear oscillators is proposed. It is shown that the second order optical response can be significantly enhanced at the frequency of the antisymmetric normal mode, thus supporting our numerical results.

Source: The Journal of Chemical Physics

DOI: 10.1063/5.0109872

Authors: Maxim Sukharev, Elena Drobnyh, Ruth Pachter

Institutions: United States Air Force Research Laboratory, Wright-Patterson Air Force Base, Arizona State University, U.S. Air Force Research Laboratory Materials and Manufacturing Directorate

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Defense, Air Force Office of Scientific Research

Awards: G2753188165, G4805816520