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

Author

Fangcao Peng, Zhuoran Wang, Guohui Yuan, Lei Guan, and Zhenming Peng

Subjects
Integrated optics devices, Fano resonance, ring resonator, biosensor, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467
Abstract

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 ~7.2 × 10-4 RIU and ~1.76 × 104 dB/RIU, respectively. Owing to its simplicity, compact footprint, and excellent performances, our device would be a promising candidate for optical label-free sensing applications.

Published
2018
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2. High-Sensitivity Refractive Index Sensing Based on Fano Resonances in a Photonic Crystal Cavity-Coupled Microring Resonator

Author

Guohui Yuan, Zhenming Peng, Fangcao Peng, Zhuoran Wang, and Guan Lei

Subjects
lcsh:Applied optics. Photonics, Materials science, Physics::Optics, chemistry.chemical_element, Integrated optics devices, 02 engineering and technology, biosensor, 01 natural sciences, 010309 optics, Erbium, Resonator, ring resonator, 0103 physical sciences, lcsh:QC350-467, Electrical and Electronic Engineering, Photonic crystal, business.industry, Fano resonance, lcsh:TA1501-1820, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, chemistry, Q factor, Optoelectronics, 0210 nano-technology, business, Refractive index, Biosensor, Sensitivity (electronics), lcsh:Optics. Light
Abstract

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 ~7.2 × 10-4 RIU and ~1.76 × 104 dB/RIU, respectively. Owing to its simplicity, compact footprint, and excellent performances, our device would be a promising candidate for optical label-free sensing applications.

Published
2018

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