Theoretical investigation of a nonreciprocal micro-ring resonator with nonreciprocity provided by its magneto-optical input–output coupler - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Optical and Quantum Electronics Année : 2023

Theoretical investigation of a nonreciprocal micro-ring resonator with nonreciprocity provided by its magneto-optical input–output coupler

Résumé

The simplest Micro-Ring Resonator consists of an input–output directional coupler connected into itself through a feedback loop. We show that a magneto-optical coupler exhibiting a nonreciprocal phase shift is enough to render the whole structure nonreciprocal, even with an otherwise reciprocal loop. We illustrate this effect by considering a planar (slab) coupler made of bigyrotropic waveguides submitted to a suitable external magnetization; its scattering parameters are derived analytically in the frame of Coupled Mode Theory. Including the modal dispersion, it is possible to adjust the dimensions and/or the operating wavelength in order to design very specific regimes, either in absorption, amplification or emission, from a rather trivial unidirectional behavior to the subtler case of well-balanced interdigitated frequency combs—circulating both ways, but separated by exactly one half of a Free Spectral Range.
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Dates et versions

hal-03937862 , version 1 (13-01-2023)

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Yann Boucher, Florian Bentivegna, Yuliya Dadoenkova. Theoretical investigation of a nonreciprocal micro-ring resonator with nonreciprocity provided by its magneto-optical input–output coupler. Optical and Quantum Electronics, 2023, 55 (3), pp.204. ⟨10.1007/s11082-022-04444-7⟩. ⟨hal-03937862⟩
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