Optical isolation via ���� -symmetric nonlinear Fano resonances

F. Nazari, Wesleyan University
H. Ramezani, The University of Texas Rio Grande Valley
M.K. Moravvej-Farshi, Tarbiat Modares University
N. Bender, Wesleyan University
D. N. Christodoulides, University of Central Florida
T. Kottos, Max Planck Institute for Dynamics and Self-organization

© 2014, The Optical Society. Original published version available at https://doi.org/10.1364/OE.22.009574.

Abstract

We show that Fano resonances created by twoPT -symmetric nonlinear micro-resonators coupled to a waveguide, have line-shape and resonance position that depends on the direction of the incident light. We utilize these features in order to induce asymmetric transport, up to 47 dBs, in the optical C-window. Our theoretical proposal requires low input power and does not compromise the power or frequency characteristics of the output signal.