Indexed by: Journal paper

Journal: Optics Express

Affiliation of Author(s): DTU Fotonik, Department of Photonics Engineering, Ørsteds Plads, Building 343, DK- 2800 Kgs. Lyngby,

Place of Publication: 美国

Discipline: Engineering

Funded by: 自然科学基金

Document Type: J

Volume: 18

Issue: 12

Page Number: 12489

Key Words: Surface plasmons，Waveguides，Sources，Quantum electrodynamics.

DOI number: 10.1364/OE.18.012489

Date of Publication: 2010-06-07

Abstract: We numerically investigate the coupling efficiency of a single self-assembled quantum dot to a metallic slot waveguide in the presence of leaky plasmonic modes. Leaky plasmonic modes refer to radiation modes with plasmonic features, resulting from the inhomogeneity of the dielectric environment in which the metallic slot waveguide is embedded. Compared to the ideal case of a homogenous dielectric environment, the coupling efficiency of an emitter to a metallic slot waveguide is significantly reduced. We attribute the reduction to the coupling to leaky plasmonic modes. By increasing the refractive index of the coating layer to minimize the impacts from the leaky plasmonic modes, we find that the coupling efficiency of the quantum dot to the single mode supported by the metallic slot waveguide can be enhanced by more than a factor 2.

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Links to published journals: https://doi.org/10.1364/OE.18.012489