Terahertz All-Optical Logic Gates Based on a Graphene Nanoribbon Rectangular Ring Resonator

Wei Su, Zhen Geng
2018 IEEE Photonics Journal  
IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. Abstract: A type of all-optical logic gates based on a graphene nanoribbon rectangular ring resonator for terahertz frequency is proposed and numerically investigated by finitedifference time-domain simulations. By utilizing the
more » ... s. By utilizing the surface plasmon polaritons propagated along the graphene nanoribbon, the tunability in frequency of the filter effect can be achieved by tuning the bias voltage of graphene. The proposed structure can realize NOT, XOR, and XNOR gates, corresponding to the high contrast ratio of about 14.2, 19.5, and 14.1 dB, respectively. The proposed logic gates would be a potential component for designing alloptical logical photonic devices in an optical communication system.
doi:10.1109/jphot.2018.2874507 fatcat:quaosq6uinas3nb4qihlf2mqp4