High-Sensitivity Refractive Index Sensing Based on Fano Resonances in a Photonic Crystal Cavity-Coupled Microring Resonator

High-Sensitivity Refractive Index Sensing Based on Fano Resonances in a Photonic Crystal Cavity-Coupled Microring Resonator

Aiming for high-sensitivity refractive index biosensing, we investigate Fano resonance in a one-dimensional photonic crystal cavity-coupled microring resonator (PCMRR) on a silicon chip. Calculated results show that utilizing the asymmetric line shape of the Fano resonance, the detection limit can b...

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Bibliographic Details
Main Authors: Fangcao Peng, Zhuoran Wang, Guohui Yuan, Lei Guan, Zhenming Peng
Format: Article
Language:English
Published: IEEE 2018-01-01
Series:IEEE Photonics Journal
Subjects:
Integrated optics devices
Fano resonance
ring resonator
biosensor
Online Access:https://ieeexplore.ieee.org/document/8315017/
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Summary:Aiming for high-sensitivity refractive index biosensing, we investigate Fano resonance in a one-dimensional photonic crystal cavity-coupled microring resonator (PCMRR) on a silicon chip. Calculated results show that utilizing the asymmetric line shape of the Fano resonance, the detection limit can be reduced by a factor of 5 and the intensity detection sensitivity of PCMRR can be increased by a factor of 5 compared with a regular silicon-on-insulator, reaching the values of &#x223C;7.2 &#x00D7; 10<sup>&#x2212;4</sup> RIU and &#x223C;1.76 &#x00D7; 10<sup>4</sup> dB&#x002F;RIU, respectively. Owing to its simplicity, compact footprint, and excellent performances, our device would be a promising candidate for optical label-free sensing applications.
ISSN:1943-0655

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