ROBUST CYLINDRICAL PLASMONIC NANO-ANTENNAS FOR LIGHT-MATTER INTERACTION

Robust Cylindrical Plasmonic Nano-Antennas for Light-Matter Interaction

A cylindrical metallic plasmonic nano-antenna consisting of a shell supporting a disk, named capped shell, is proposed and studied by frequency domain finite element analysis. This new topology is shown to be weakly dependent on the radius of the structure and is therefore suitable for fabrication by parallel processes such as island lithography which generates a pseudo-random array with a dist...

Directional Plasmonic Nano-Antennas

We address 2D arrays of metallic nano-particles arranged in a honeycomb lattice in the proximity of a hetero-interface of two media with high dielectric contrast. These systems can function as antennas in the visible range of the spectrum. We demonstrate that their radiation patterns can be made very directional by appropriate choice of the system geometry and materials. We show also that if su...

Coupling of light from microdisk lasers into plasmonic nano-antennas.

An optical dipole nano-antenna can be constructed by placing a sub-wavelength dielectric (e.g., air) gap between two metallic regions. For typical applications using light in the infrared region, the gap width is generally in the range between 50 and 100 nm. Owing to the close proximity of the electrodes, these antennas can generate very intense electric fields that can be used to excite nonlin...

Light-Matter Interaction in Nano-Photonic Systems

Plasmonic-cavity model for radiating nano-rod antennas

In this paper, we propose the analytical solution of nano-rod antennas utilizing a cylindrical harmonics expansion. By treating the metallic nano-rods as plasmonic cavities, we derive closed-form expressions for both the internal and the radiated fields, as well as the resonant condition and the radiation efficiency. With our theoretical model, we show that besides the plasmonic resonances, eff...