Nonlinear Harmonic Generation in Sub-5 nm Plasmonic Nanogap Metasurfaces
Plasmonic nano-antennas featuring dielectric nano-gaps confines the electromagnetic field to sub-wavelength volumes, enabling strong field enhancements and thus boosting nonlinear optical effects. Quantum effects, manifesting as a nonlocal macroscopic response, also play an important role in gaps of few nm [1]. The nonlinear signal can be strongly enhanced by arranging identical nano-antennas in an array, leading to the appearance of collective resonances (in our case guided lattice resonances due to their placement on a membrane) where surface waves lock the phase of all the antennas via radiative coupling [2].
Authors
- Jeetendra Gour (ORCID: https://orcid.org/0000-0002-0098-800X)
- Uwe D. Zeitner (ORCID: https://orcid.org/0000-0002-3980-6971)
- Alessandro Alberucci (ORCID: https://orcid.org/0000-0001-5346-2549)
- Sebastian Beer (ORCID: https://orcid.org/0009-0005-6061-1852)
- Thomas Siefke (ORCID: https://orcid.org/0000-0001-6876-4080)
- Pallabi Paul (ORCID: https://orcid.org/0000-0003-2701-3189)
- Stefan Nolte (ORCID: https://orcid.org/0000-0002-2919-2662)
- Adriana Szeghalmi (ORCID: https://orcid.org/0000-0003-2055-2825)
- Ulf Peschel (ORCID: https://orcid.org/0000-0002-3980-9224)
Institutions
- Ferdinand-Braun-Institut (DE)
- Fraunhofer Institute for Applied Optics and Precision Engineering (DE)
- Friedrich Schiller University Jena (DE)
Publication Details
- Published
- 2025-06-23
- DOI
- https://doi.org/10.1109/cleo/europe-eqec65582.2025.11111027
- Primary Topic
- Metamaterials and Metasurfaces Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00