Highly sensitive silicon microring sensor with sharp asymmetrical resonance | Zendy

Huaxiang Yi | Zendy; D. S. Citrin | Zendy; Zhiping Zhou | Zendy

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Highly sensitive silicon microring sensor with sharp asymmetrical resonance

Author(s) -

Huaxiang Yi,

D. S. Citrin,

Zhiping Zhou

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.002967

Subject(s) - resonator , fano resonance , optics , resonance (particle physics) , silicon , waveguide , fabry–pérot interferometer , reflection (computer programming) , refractive index , sensitivity (control systems) , coupled mode theory , scattering , silicon photonics , total internal reflection , physics , materials science , optoelectronics , photonics , wavelength , atomic physics , plasmon , electronic engineering , computer science , programming language , engineering

We analyze the resonance spectrum in silicon microring resonators taking into account the end-facet reflection from a coupled waveguide, which can provide a dense set of Fabry-Perot resonances. Based on the simple configuration of a microring coupled with a waveguide, the resulting asymmetric Fano-like non-Lorentzian resonance is obtained by scattering theory and experiment. Enhanced sensing performance with steeper slope to the resonance is theoretically predicted and experimentally demonstrated for a 10-microm racetrack silicon microring resonator. A high sensitivity of approximately 10(-8) RIU in terms of the detection limit is obtained in a 30-dB signal-to-noise ratio (SNR) system.

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