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Updated: May 9, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Tailoring magnetic dipole emission with plasmonic split-ring resonators.

Sven M Hein1, Harald Giessen

  • 14th Physics Institute and Research Center SCoPE, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany. s.hein@pi4.uni-stuttgart.de

Physical Review Letters
|July 30, 2013
PubMed
Summary

We numerically explored magnetic dipole emitters near plasmonic split-ring resonators (SRRs). Considering SRR symmetry breaking and emitter-resonator retardation is crucial for manipulating emission, enabling efficient plasmonic antennas.

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Area of Science:

  • Plasmonics
  • Nanophotonics
  • Quantum Emitters

Background:

  • Split-ring resonators (SRRs) exhibit strong magnetic dipole responses in the near-infrared.
  • Plasmonic antennas are key for controlling light-matter interactions.
  • Understanding emitter-resonator coupling is vital for nanophotonic devices.

Purpose of the Study:

  • To numerically investigate the emission behavior of magnetic dipole emitters coupled to SRRs.
  • To compare magnetic dipole emitter behavior with electric dipole emitters in SRRs.
  • To explore methods for manipulating emission spectra using plasmonic structures.

Main Methods:

  • Numerical simulations of magnetic dipole emitters near SRRs.
  • Analysis of electromagnetic field interactions and resonance phenomena.

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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  • Comparison with theoretical models for electric dipole emitters.

    • Main Results:

    • A simple electric dipole approximation is insufficient for magnetic dipole emitters due to SRR gap-induced symmetry breaking.
    • Retardation effects between the emitter and SRR provide an additional control parameter for emission manipulation.
    • SRRs significantly influence the emission characteristics of magnetic dipole sources.

    Conclusions:

    • Accurate modeling of magnetic dipole emitters requires accounting for SRR symmetry breaking.
    • Emitter-resonator retardation offers a novel pathway for tailoring plasmonic antenna performance.
    • This work advances the design of efficient plasmonic antennas for magnetic dipole sources.