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Analysis of Graphene Plasmonic Waveguide with Inhomogeneous Substrate in Terahertz Band

Rezaei, Zohreh | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48452 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Borji, Amir; Rajaei, Behzad
  7. Abstract:
  8. Due to its extensive applications in imaging, data security, medication, etc., Terahertz has attaracted an ever-inceasing attention. Design and implementation of Terahertz sources and circuits as waveguide, filters, etc. in this band have attracted attention. The unique elec-tric characteristics of graphene, like showing plasmonic characteristics in Terahertz frequency band, made this recently recognized matter a promising one to build super-integrated plas-monic circuits in Terahertz band. In this text, the first section represents an introduction for a number of graphene waveguides as well as studying the effective refractive index method to analyze graphene waveguides. Due to the small scale of these waveguides in comparison with the free space wavelength and their large propagation constant, it is possible to analyze them by quasi-static approximation method. In this text by using this method, a graphene waveguide accompanied by a non-uniform insulator substrate is analyzed. The waveguides characteristics as propagation constant and electric field distribution through waveguides cross section is analyzed by this analytical-numerical method and for validation, commercial software like COMSOL have been used
  9. Keywords:
  10. Graphene-Based Waveguides ; Terahertz Band ; Plasmonic Waveguides ; Refractive Index ; Graphene Plasmonics Properties

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