Design of independently tunable dual Fano devices based on asymmetric microrings

Cheng-long Sun; Long-xue Liang; Xiao-suo Wu; Jiang-feng Zhang

doi:10.1117/12.3010811

1 November 2023 Design of independently tunable dual Fano devices based on asymmetric microrings

Cheng-long Sun, Long-xue Liang, Xiao-suo Wu, Jiang-feng Zhang

Proceedings Volume 12917, International Conference on Precision Instruments and Optical Engineering (PIOE 2023); 1291708 (2023) https://doi.org/10.1117/12.3010811
Event: 3rd International Conference on Precision Instruments and Optical Engineering (PIOE 2023), 2023, Shanghai, China

Abstract

In order to optimize the specrum of Fano resonance at multiple positions at the same time and maximize the value of multiple Fano resonances, this paper proposes a new asymmetric dual microring coupled device structure. In this structure, two air holes are embedded in the bus waveguide as reflection units to form a Fabry-Perot (FP) cavity, and two microrings with different radii are coupled on the upper and lower sides of the bus waveguide to achieve double Fano resonance. The transmission spectrum of the proposed device structure and the electric field distribution of the resonant cavity are simulated by using the finite difference time domain (FDTD) method. The frequency and line shape of the Fano resonance are changed by dynamically changing the refractive index of the upper and lower microring resonator parts, thereby realizing independent tunability of the dual Fano. The proposed asymmetric double microring coupled resonator has a single resonant peak extinction ratio of up to 35.95 dB and a slope of 189.2 dB/nm. The device proposed in this paper has good independent tunability, simple structure and sufficient flexibility, which can be used in multi-wavelength optical switches, dual-function sensors and other occasions.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Cheng-long Sun, Long-xue Liang, Xiao-suo Wu, and Jiang-feng Zhang "Design of independently tunable dual Fano devices based on asymmetric microrings", Proc. SPIE 12917, International Conference on Precision Instruments and Optical Engineering (PIOE 2023), 1291708 (1 November 2023); https://doi.org/10.1117/12.3010811

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KEYWORDS

Microrings

Refractive index

Waveguides

Microresonators

Resonators

Simulations

Cavity resonators

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