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Ultra-compact all-optical reversible Feynman gate based on suspended graphene plasmonic waveguides

Safinezhad, A ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1007/s11082-022-03680-1
  3. Publisher: Springer , 2022
  4. Abstract:
  5. In this paper, we propose a reversible Feynman gate utilizing the interference effect for optical communications and computing. The plasmonic waveguides are created by placing a suspended graphene sheet, held by two SiO2 ridges, 10 nm above the Si ribs. The Finite-difference time-domain (FDTD) method is used to simulate the proposed gate in frequency and time domains. Simulation results show that high extinction ratios as much as (15.12 dB) and 13 dB are achievable at the wavelength of 10 μm for the output bits P and Q, respectively. The device is immune against ± 20% variations in the width of the Si ribs due to fabrication errors and its performance can be controlled by setting the chemical potential of the graphene sheet to a suitable value. The device has an ultra-compact footprint of 3 μm2, suitable for use in on-chip digital photonic applications. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature
  6. Keywords:
  7. Plasmonic waveguide ; Reversible gate ; Finite difference time domain method ; Optical communication ; Optical waveguides ; Plasmonics ; Silica ; Silicon ; All optical ; Destructive interference ; Feynman ; Frequency and time domains ; Graphene sheets ; High extinction ratios ; Interference effects ; Plasmonic waveguides ; Reversible gates ; Suspended graphene ; Graphene
  8. Source: Optical and Quantum Electronics ; Volume 54, Issue 5 , 2022 ; 03068919 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11082-022-03680-1