Fano plasmonics goes nonlinear
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 06, 2022
- Source ID
- 10.1063/5.0109872
Entities
People
- Elena Drobnyh
- Maxim Sukharev
- Ruth Pachter
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- Arizona State University