We report on the demonstration of an effective, nonlinearity-induced nonreciprocal behavior in a single nonmagnetic multi-mode Taiji resonator. Nonreciprocity is achieved by a combination of an intensity-dependent refractive index and of a broken spatial reflection symmetry. Continuous wave power-dependent transmission experiments show nonreciprocity and a direction-dependent optical bistability loop. These can be explained in terms of the unidirectional mode coupling that causes an asymmetric power enhancement in the resonator. The observations are quantitatively reproduced by a numerical finite-element theory and physically explained by an analytical coupled-mode theory. This nonlinear Taiji resonator has the potential of being the building block of large arrays for the study of topological and/or non-Hermitian physics. This represents an important step towards the miniaturization of nonreciprocal elements for photonic integrated networks.

Nonlinearity-Induced Reciprocity Breaking in a Single Nonmagnetic Taiji Resonator / Munoz de las Heras, A.; Franchi, R.; Biasi, S.; Ghulinyan, M.; Pavesi, L.; Carusotto, I.. - In: PHYSICAL REVIEW APPLIED. - ISSN 2331-7019. - 15:5(2021), pp. 054044.1-054044.10. [10.1103/PhysRevApplied.15.054044]

Nonlinearity-Induced Reciprocity Breaking in a Single Nonmagnetic Taiji Resonator

Munoz de las Heras, A.;Franchi, R.;Biasi, S.;Ghulinyan, M.;Pavesi, L.;Carusotto, I.
2021-01-01

Abstract

We report on the demonstration of an effective, nonlinearity-induced nonreciprocal behavior in a single nonmagnetic multi-mode Taiji resonator. Nonreciprocity is achieved by a combination of an intensity-dependent refractive index and of a broken spatial reflection symmetry. Continuous wave power-dependent transmission experiments show nonreciprocity and a direction-dependent optical bistability loop. These can be explained in terms of the unidirectional mode coupling that causes an asymmetric power enhancement in the resonator. The observations are quantitatively reproduced by a numerical finite-element theory and physically explained by an analytical coupled-mode theory. This nonlinear Taiji resonator has the potential of being the building block of large arrays for the study of topological and/or non-Hermitian physics. This represents an important step towards the miniaturization of nonreciprocal elements for photonic integrated networks.
2021
5
Munoz de las Heras, A.; Franchi, R.; Biasi, S.; Ghulinyan, M.; Pavesi, L.; Carusotto, I.
Nonlinearity-Induced Reciprocity Breaking in a Single Nonmagnetic Taiji Resonator / Munoz de las Heras, A.; Franchi, R.; Biasi, S.; Ghulinyan, M.; Pavesi, L.; Carusotto, I.. - In: PHYSICAL REVIEW APPLIED. - ISSN 2331-7019. - 15:5(2021), pp. 054044.1-054044.10. [10.1103/PhysRevApplied.15.054044]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/306883
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