Indexed by: Journal paper

Journal: Phys. Rev. B

Affiliation of Author(s): 光电学院，国家光电研究中心

Place of Publication: 美国

Discipline: Engineering

Funded by: 自然科学基金

Document Type: J

Volume: 90

Issue: 23

Page Number: 235406

Key Words: 无

DOI number: 10.1103/PhysRevB.90.235406

Date of Publication: 2014-12-15

Abstract: We investigate a periodic array of aluminum nanoantennas embedded in a light-emitting slab waveguide. By varying the waveguide thickness, we demonstrate the transition from weak to strong coupling between localized surface plasmons in the nanoantennas and refractive index guided modes in the waveguide. We experimentally observe a nontrivial relationship between extinction and emission dispersion diagrams across the weak- to strong-coupling transition. These results have implications for a broad class of photonic structures where sources are embedded within coupled resonators. For nanoantenna arrays, strong versus weak coupling leads to drastic modifications of radiation patterns without modifying the nanoantennas themselves, thereby representing an unprecedented design strategy for nanoscale light sources.

Note: 无

Links to published journals: https://doi.org/10.1103/PhysRevB.90.235406