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Ultra-compact all-optical reversible Feynman gate based on suspended graphene plasmonic waveguides
, Article Optical and Quantum Electronics ; Volume 54, Issue 5 , 2022 ; 03068919 (ISSN) ; Eslami, M. R ; Jafari Jozani, K ; Rezaei, M. H ; Sharif University of Technology
Springer
2022
Abstract
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...