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Analytical and rigorous method for analysis of an array of magnetically-biased graphene ribbons

Rahmanzadeh, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1364/OE.27.028395
  3. Publisher: OSA - The Optical Society , 2019
  4. Abstract:
  5. A sheet of graphene under magnetic bias attains anisotropic surface conductivity, opening the door for realizing compact devices such as Faraday rotators, isolators and circulators. In this paper, an accurate and analytical method is proposed for a periodic array of graphene ribbons under magnetic bias. The method is based on integral equations governing the induced surface currents on the coplanar array of graphene ribbons. For subwavelength size ribbons subjected to an incident plane wave, the current distribution is derived leading to analytical expressions for the reflection/transmission coefficients. The results obtained are in excellent agreement with full-wave simulations and predict resonant spectral effects that cannot be accounted for by existing semi-analytical methods. Finally, we extract an analytical, closed form solution for the Faraday rotation of magnetically-biased graphene ribbons. In contrast to previous studies, this paper presents a fast, precise and reliable technique for analyzing magnetically-biased array of graphene ribbons, which are one of the most popular graphene-based structures. © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
  6. Keywords:
  7. Integral equations ; Analytical expressions ; Analytical method ; Anisotropic surfaces ; Closed form solutions ; Current distribution ; Full-wave simulations ; Semi-analytical methods ; Spectral effects ; Graphene
  8. Source: Optics Express ; Volume 27, Issue 20 , 2019 ; 10944087 (ISSN)
  9. URL: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-27-20-28395