Plasmonic resonators: fundamental properties and applications

Abstract

Resonators of surface plasmons are discussed in this review. Any material supporting the excitation of surface plasmons, either by light, or by electron beams can be used for designing a resonator. Despite the number of materials supporting surface plasmons being restricted to a small number, noble metals, some two-dimensional materials as graphene, transition metal oxides, and several highly doped semiconductors have been used in plasmonic applications. Isolated and coupled metal nanoparticles, arrays of particles on substrates, nanoparticle suspensions, alternated metal and dielectric thin films, dielectric cavities in surfaces of noble metals and sheets and stripes of two-dimensional materials are typical examples of systems used for excitation of plasmonic resonances. These resonances have been used in a fast increasing number of applications: transformation of light beam properties, selective optical induced heating, sensing of chemical or biological compounds, enhancement of non-linear optical excitation in nanomaterials, optical coherence applications in quantum optics. The operating spectral range, variety of sizes, shapes and geometrical configurations that can be tailored and the exceptional optical properties of surface plasmons promote their use in a wide variety of applications at the nanoscale, where other types of resonators cannot be used, or are too inefficient. We review a large variety of plasmonic resonators and their most relevant properties. We first discuss the fundamental properties of the plasmonic resonances, using simple physical models. Then we present a retrospective of applications evidencing the most relevant aspects of interaction of surface plasmons with matter and radiation. Finally we focus the most recent applications covering metamaterials, plasmonic materials with topological properties and resonators supporting plasmon-electron interaction.

Selectively Strong Coupling of MoS2 Excitons to a Metamaterial at Room Temperature

“…The main challenge to use this approach for the coupled MoS 2 -HMM system, is to obtain an experimental estimate of the HMM loss rate (κ). The quality factor (Q) [57] of a plasmonic mode central frequency (ω) is given by Q = ω/κ = ω/ ω. From the white-light reflection spectra (DR), the ratio between the mode central frequency (ω) to the line width ( ω) is considered as the quality factor.…”

Enhanced extraordinary terahertz transmission through coupling between silicon resonators

“…9,10 It attracted extensive research interest in the elds of optical communication, spectral imaging, sensors, tunable optical lters, absorbers, and near-eld optics. 4,[11][12][13][14][15][16] A large number of theoretical and experimental studies have veried that EOT can be produced through metal holes or periodic slits. [17][18][19] In 2004, Tanaka and others simulated an I-shaped aperture in a thick metallic screen and obtained a high near-eld intensity.…”

Thermal release tape-assisted semiconductor membrane transfer process for hybrid photonic devices embedding quantum emitters

“…These results show how a simple pillar/back reflector geometry, made possible by the implementation of the transfer technique that we have developed, can increase the collection efficiency from single quantum dot lines. Other device geometries can be realised using this technique, for instance circular Bragg grating cavities with a gold back reflector [28], planar antennas [29], plasmonic structures [30], in an easy and repeatable manner.…”