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.
Nazari, F.; Ramezani, Hamidrez; Moravvej-Farshi, M.K.; Bender, N.; Christodoulides, D. N.; and Kottos, T., "Optical isolation via 𝒫𝒯 -symmetric nonlinear Fano resonances" (2014). Physics and Astronomy Faculty Publications and Presentations. 7.
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