Relating localized nanoparticle resonances to an associated antenna problem

Abstract

We conceptually unify the description of resonances existing at metallic nanoparticles and optical nanowire antennas. To this end the nanoantenna is treated as a Fabry-Perot resonator with arbitrary semi-nanoparticles forming the terminations. We show that the frequencies of the quasi-static dipolar resonances of these nanoparticles coincide with the frequency where the phase of the complex reflection coefficient of the fundamental propagating plasmon polariton mode at the wire termination amounts to $\pi$. The lowest order Fabry-Perot resonance of the optical wire antenna occurs therefore even for a negligible wire length. This approach can be used either to easily calculate resonance frequencies for arbitrarily shaped nanoparticles or for tuning the resonance of nanoantennas by varying their termination.

Submitted to Phys. Rev. B

References in corpus (3)

• Strong coupling of single emitters to surface plasmons
• A microscopic view of the electromagnetic properties of sub-wavelength metallic surfaces
• Nano plasmon polariton modes of a wedge cross section metal waveguide

Cited by in corpus (6)

• Metalenses at visible wavelengths: past, present, perspectives
• Tunable Graphene Antennas for Selective Enhancement of THz-Emission
• Circular Optical Nanoantennas: An Analytical Theory
• Deep-Subwavelength Spatial Characterization of Angular Emission from Single-Crystal Au Plasmonic Ridge Nanoantennas
• Geometric interpretations for resonances of plasmonic nanoparticles
• Characterization of a circular optical nanoantenna by nonlinear photoemission electron microscopy