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Frequency-tunable logic gates in graphene nano-waveguides

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Abstract

In this study, simple basic plasmonic logic gates of XOR, OR, and NOT based on graphene nano-ribbon resonators coupled to properly designed arrangements of nano-waveguides, as input and output logic ports, are demonstrated. The operation of the structures as frequency selective components is based on the propagation of edge modes in nano-waveguides and coupling to nano-ribbon resonators located in appropriate locations. The gates performance is investigated through analytic approaches and verified numerically using the finite difference time domain method. Typical extinction ratio of about 8 dB between ON and OFF logic states has been attained. According to the fantastic feature of voltage-dependent chemical potential of graphene conductivity, the characteristics of the structures can be actively manipulated. These sub-wavelength plasmonic components can be employed extensively in terahertz demanded applications.

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Authors and Affiliations

  1. Faculty of Engineering, Ayatollah Boroujerdi University, Boroujerd, 6919969411, Iran

    Alireza Dolatabady & Mohammad Abedini

  2. Center of Excellence in Electromagnetics, Faculty of Electrical Engineering, K. N. Toosi University of Technology, Tehran, 1631714191, Iran

    Alireza Dolatabady & Nosrat Granpayeh

Authors
  1. Alireza Dolatabady
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  2. Nosrat Granpayeh
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  3. Mohammad Abedini
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Correspondence to Alireza Dolatabady.

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Dolatabady, A., Granpayeh, N. & Abedini, M. Frequency-tunable logic gates in graphene nano-waveguides. Photon Netw Commun 39, 187–194 (2020). https://doi.org/10.1007/s11107-020-00881-0

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  • DOI: https://doi.org/10.1007/s11107-020-00881-0

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