Work

Plasmon confinement in fractal quantum systems

Year: 2018

Type: article

Abstract: Recent progress in the fabrication of materials has made it possible to create arbitrary nonperiodic two-dimensional structures in the quantum plasmon regime. This paves the way for exploring the quantum plasmonic properties of electron gases in complex geometries. In this work we study systems with a fractal dimension. We calculate the full dielectric functions of two prototypical fractals with different ramification numbers, namely the Sierpinski carpet and gasket. We show that the Sierpinski carpet has a dispersion comparable to a square lattice, but the Sierpinski gasket features highly localized plasmon modes with a flat dispersion. This strong plasmon confinement in finitely ramified fractals can provide a novel setting for manipulating light at the quantum level.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.97.205434

Authors: Tom Westerhout, Edo van Veen, Mikhail I. Katsnelson, Shengjun Yuan

Institutions: Radboud University Nijmegen, Wuhan University

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, H2020 European Research Council

Awards: G2550218078, G335313930, G4434829152