Breaking reciprocity in a non-Hermitian photonic coupler with saturable absorption

Dimitrios Chatzidimitriou, Alexandros Pitilakis, Traianos Yioultsis, and Emmanouil E. Kriezis
Phys. Rev. A 103, 053503 – Published 7 May 2021

Abstract

We study the breaking of reciprocity in non-Hermitian coupled photonic waveguides by the simultaneous action of the nonlinear effect of saturable absorption and the presence of exceptional points. The nonlinear response of such a system is studied in depth, giving physical insight into the operational principles and fundamental limitations while producing analytical and semianalytical results for the transmission and nonreciprocal intensity range. We numerically validate the theoretical results and assess important performance metrics for the nonreciprocal operation of such a device. This class of passive nonresonant devices can offer broadband on-chip nonreciprocal operation, with significant potential for high-speed applications.

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  • Received 15 February 2021
  • Accepted 16 April 2021

DOI:https://doi.org/10.1103/PhysRevA.103.053503

©2021 American Physical Society

Physics Subject Headings (PhySH)

Nonlinear DynamicsAtomic, Molecular & Optical

Authors & Affiliations

Dimitrios Chatzidimitriou*, Alexandros Pitilakis, Traianos Yioultsis, and Emmanouil E. Kriezis

  • School of Electric and Computer Engineering, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece

  • *dchatzid@auth.gr

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Vol. 103, Iss. 5 — May 2021

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