Magnet-Free Non-Reciprocal Photonic Platform Based on Time-Modulated Graphene

D. Correas-Serrano, Juan Sebastian Gomez Diaz

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We propose a novel paradigm to achieve giant photonic non-reciprocity based on time-modulated graphene capacitors coupled to photonic waveguides, without reliance on any magneto-optic effects. The resulting hybrid graphene-dielectric platform is low-loss, silicon-compatible, robust against graphene's imperfections, scalable from terahertz to near infrared frequencies, and it exhibits very large nonreciprocal responses using realistic biasing schemes. Analytical frameworks based on solving the eigenstates of the modulated structure and on spatial coupled mode theory have been developed to unveil the underlying physics that dominate the proposed platform and to quickly design and analyze various isolators. Results, validated through harmonic balance full-wave simulations, confirm the flexibility of our low-loss (<3dB) platform to engineer a wide variety of responses and even to extend the isolation bandwidth. We envision that this technology will pave the wave to magnetic-free, fully-integrated, and CMOS-compatible nonreciprocal components with wide applications in sensing, communication systems, and optical networks.

Original languageEnglish (US)
Title of host publication2018 2nd URSI Atlantic Radio Science Meeting, AT-RASC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9789082598735
StatePublished - Sep 24 2018
Event2nd URSI Atlantic Radio Science Meeting, AT-RASC 2018 - Gran Canaria, Spain
Duration: May 28 2018Jun 1 2018


Other2nd URSI Atlantic Radio Science Meeting, AT-RASC 2018
CityGran Canaria

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Electrical and Electronic Engineering
  • Instrumentation


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