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Two Switchable Plasmonically Induced Transparency Effects in a System with Distinct Graphene Resonators.

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Summary

This study introduces a graphene resonator system capable of achieving two switchable plasmonically induced transparency (PIT) effects. By altering polarization, users can switch between these distinct PIT states for advanced plasmonic devices.

Keywords:
Graphene plasmonsPerfect absorptionPlasmonic sensingPlasmonically induced transparency

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Area of Science:

  • Plasmonics
  • Nanophotonics
  • Materials Science

Background:

  • Conventional plasmonic systems typically exhibit a single plasmonically induced transparency (PIT) effect due to limited coupling pathways.
  • Achieving multiple or switchable PIT effects is crucial for developing advanced plasmonic functionalities.

Purpose of the Study:

  • To propose and investigate a novel graphene resonator-based system for realizing two switchable PIT effects.
  • To demonstrate the polarization-selective control over these PIT effects.

Main Methods:

  • Utilizing a system composed of graphene nanoribbons (GNRs) coupled with dielectric grating-loaded graphene layer resonators.
  • Employing crossed resonator designs to enable distinct coupling pathways.
  • Conducting parametric studies and applying the two-particle model for theoretical analysis.

Main Results:

  • Successfully achieved two distinct PIT effects with different resonant positions and linewidths.
  • Demonstrated that the PIT effects are polarization-selective, allowing switching by changing polarization direction.
  • Numerical simulations showed excellent agreement with theoretical predictions.

Conclusions:

  • The proposed graphene resonator system offers a method for creating switchable dual PIT effects.
  • This platform is suitable for designing advanced plasmonic devices like tunable dual-band sensors and perfect absorbers.