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Peak modulation in multicavity-coupled graphene-based waveguide system.

Jicheng Wang1,2, Xiaosai Wang3, Hongyan Shao3

  • 1School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi, 214122, China. jcwang@jiangnan.edu.cn.

Nanoscale Research Letters
|January 7, 2017
PubMed
Summary

This study explores plasmonically induced transparency (PIT) in graphene waveguide systems. Researchers achieved multiple PIT peaks by increasing graphene rectangle cavities, offering potential for advanced plasmonic devices.

Keywords:
Graphene-based waveguideMultiple peak modulationPlasmonically induced transparency

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Plasmonically induced transparency (PIT) is a quantum interference effect observed in various optical systems.
  • Graphene-based systems offer tunable optical properties due to their unique electronic characteristics.
  • Multicavity-coupled waveguide systems are crucial for developing advanced photonic devices.

Purpose of the Study:

  • To theoretically and numerically investigate plasmonically induced transparency (PIT) in a multicavity-coupled graphene-based waveguide system.
  • To explore the effect of varying the number of graphene rectangle cavities (GRCs) on PIT.
  • To analyze the influence of cavity spacing on PIT characteristics.

Main Methods:

  • Utilizing the finite element method (FEM) for theoretical and numerical simulations.
  • Investigating the tunable properties of monolayer graphene by altering its chemical potential.
  • Analyzing the spectral response of the multicavity system to identify PIT peaks.

Main Results:

  • Achieved multiple PIT peaks by increasing the number of GRCs.
  • Demonstrated tunable blue shift of PIT peaks by adjusting graphene's chemical potential.
  • Observed a reduction to a single PIT peak when the distance between the third and second cavities was 100 nm.

Conclusions:

  • The proposed graphene-based waveguide system enables tunable multiple PIT peaks.
  • The system is experimentally feasible and offers potential for 3D ultra-compact, high-performance plasmonic devices.
  • This research contributes to the advancement of dynamical modulation plasmonic devices.