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Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
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Electromagnetically induced transparency (EIT)-like transmission in side-coupled complementary split-ring resonators.

Yinghui Guo1, Lianshan Yan, Wei Pan

  • 1Center for Information Photonics & Communications, School of Information Science & Technology, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.

Optics Express
|November 29, 2012
PubMed
Summary
This summary is machine-generated.

We demonstrate electromagnetically induced transparency (EIT)-like transmission in plasmonic waveguides using complementary split-ring resonators. Their electromagnetic responses are tunable by structural asymmetry and baffle width, enabling simultaneous EIT in visible and near-infrared regions.

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Area of Science:

  • Plasmonics
  • Electromagnetism
  • Nanophotonics

Background:

  • Plasmonic waveguides offer unique light-matter interaction capabilities.
  • Electromagnetically induced transparency (EIT) is a quantum interference phenomenon enabling sharp resonant features.
  • Complementary split-ring resonators (CSRRs) are metamaterial structures with tunable electromagnetic responses.

Purpose of the Study:

  • To investigate the EIT-like transmission in a plasmonic waveguide system coupled with CSRRs.
  • To explore the tunability of CSRR electromagnetic responses for achieving EIT-like phenomena.
  • To demonstrate simultaneous EIT-like transmission in visible and near-infrared regions using cascaded CSRRs.

Main Methods:

  • Utilizing an LC resonance model to explain the electromagnetic responses of CSRRs.
  • Employing finite difference time domain (FDTD) simulations to verify the LC model and analyze transmission spectra.
  • Modifying the asymmetry degree of CSRR structures and the width of metallic baffles to control electromagnetic responses.

Main Results:

  • The side-coupled CSRR system exhibits EIT-like transmission.
  • The LC resonance model accurately describes the CSRR's electromagnetic behavior, validated by FDTD simulations.
  • CSRR electromagnetic responses are flexibly controlled by structural asymmetry and metallic baffle width.
  • Cascaded CSRRs achieve simultaneous EIT-like transmission in the visible and near-infrared spectral regions.

Conclusions:

  • CSRR-based plasmonic waveguides can effectively achieve EIT-like transmission.
  • The tunability of CSRR structures allows for precise control over EIT-like phenomena.
  • This work paves the way for developing novel optical devices operating in visible and near-infrared wavelengths.