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High-Q tunable Fano resonances in the curved waveguide resonator with mirrors with spatially variable reflectivity
A.V. Dyshlyuk 1,2,3, O.B. Vitrik 1,2

1 IACP FEB RAS, 690041, Russia, Vladivostok, Radio Str. 5;
2 Far Eastern Federal University, 690091, Russia, Vladivostok, Sukhanova Str. 8;
3 Vladivostok State University of Economics and Service, 690014, Russia, Vladivostok, Gogolya Str. 41

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DOI: 10.18287/2412-6179-CO-1183

Pages: 215-223.

Full text of article: Russian language.

Abstract:
High-Q Fano resonances are demonstrated, as well as effects similar to electromagnetically induced transparency arising in a curved Fabry-Perot waveguide resonator with variable-reflection mirrors. It is shown that these effects arise as a result of coupling the fundamental mode of the bent waveguide core with whispering gallery cladding modes. An influence of the main geometrical parameters of the resonator on the resonance features in its reflection and transmission spectra is studied. The results obtained can be used in the creation of new functional elements of photonics based on curved waveguides, in particular, highly sensitive portable refractometers for bio- and chemosensory systems, as well as optical sensors of mechanical effects.

Keywords:
Fano resonance, electromagnetically induced transparency, bent waveguide, whispering gallery mode, optical refractometry.

Citation:
Dyshlyuk AV, Vitrik OB. High-Q tunable Fano resonances in the curved waveguide resonator with mirrors with spatially variable reflectivity. Computer Optics 2023; 47(2): 215-223. DOI: 10.18287/2412-6179-CO-1183.

Acknowledgements:
This work was supported by the Russian Foundation for Basic Research under project No. 20-02-00556А.

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