In this work the design, fabrication and optical characterization of a polarization-sensitive L-shape nanoantenna device are reported. Such configuration supports plasmon-polariton modes that are combinations of in-phase and out-of-phase single antenna long-axis surface plasma oscillations. In the former case charges distributions induce in the gap region an intense hot spot while in the latter one a "zero-field spot"occurs in a plasmonic mode which can be referred to a non-zero dipolar momentum.
Bibliographical noteFunding Information:
The authors gratefully acknowledge support from European Projects SMD FP7 No. CP-FP 229375-2; Nanoantenna FP7 No. 241818; FOCUS FP7 No. 270483.
- Electron beam lithography
- L-shape nanoantenna
- Plasmon-polariton modes
- Zero-field spot
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering