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Y Jeyaram1, N Verellen, X Zheng

  • 1Institute for Nanoscale Physics and Chemistry, INPAC, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium. YogeshSharma.Jeyaram@fys.kuleuven.be

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This summary is machine-generated.

Introducing asymmetry in metallic Split Ring Resonators excites higher-order modes. Asymmetric resonators exhibit significantly higher quality factors for even modes compared to odd modes.

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Area of Science:

  • Metamaterials and Nanophotonics
  • Electromagnetics and Optics

Background:

  • Split Ring Resonators (SRRs) are fundamental building blocks in metamaterial research.
  • Symmetric SRRs typically support limited resonant modes under normal incidence.
  • Controlling and enhancing resonant modes is crucial for advanced optical applications.

Purpose of the Study:

  • To investigate the impact of structural asymmetry on the resonant modes of planar metallic Split Ring Resonators.
  • To explore the excitation of higher-order resonant modes (even and odd) in asymmetric SRRs.
  • To experimentally compare the quality factors of different resonant modes in asymmetric structures.

Main Methods:

  • Theoretical modeling of symmetric and asymmetric Split Ring Resonators.
  • Experimental fabrication and characterization of metallic SRRs.
  • Analysis of electromagnetic response and resonant mode excitation.

Main Results:

  • Structural asymmetry enables the excitation of previously inaccessible higher-order modes (l=2, 3, 5).
  • Both even and odd higher-order modes are observed in asymmetric SRRs.
  • Experimentally, even mode resonances in asymmetric resonators show a 5.8 times higher quality factor than higher-order odd resonances.

Conclusions:

  • Asymmetric Split Ring Resonators offer enhanced control over electromagnetic response.
  • The ability to excite and sustain higher-order modes with high quality factors opens new avenues for metamaterial design.
  • This study provides a pathway for developing novel optical devices with tailored resonant properties.