All-dielectric refractive index sensor based on Fano resonance with high sensitivity in the mid-infrared region

Yuhao Zhang; Zhongzhu Liang; Dejia Meng; Zheng Qin; Yandong Fan; Xiaoyan Shi; David R. Smith; Enzhu Hou

Results in Physics (May 2021)

All-dielectric refractive index sensor based on Fano resonance with high sensitivity in the mid-infrared region

Yuhao Zhang,
Zhongzhu Liang,
Dejia Meng,
Zheng Qin,
Yandong Fan,
Xiaoyan Shi,
David R. Smith,
Enzhu Hou

Affiliations

Yuhao Zhang: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of the Chinese Academy of Sciences, Beijing 100049, China
Zhongzhu Liang: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of the Chinese Academy of Sciences, Beijing 100049, China; Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, College of Physics, Northeast Normal University, Changchun 130024, China; Corresponding author at: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China.
Dejia Meng: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China
Zheng Qin: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of the Chinese Academy of Sciences, Beijing 100049, China
Yandong Fan: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of the Chinese Academy of Sciences, Beijing 100049, China
Xiaoyan Shi: State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of the Chinese Academy of Sciences, Beijing 100049, China
David R. Smith: Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, NC 27708, USA
Enzhu Hou: Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, College of Physics, Northeast Normal University, Changchun 130024, China

Journal volume & issue: Vol. 24
p. 104129

Abstract

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We design and numerically analyze a Fano resonance device based on periodical all-dielectric “lucky knot” shaped nanostructure in the mid-infrared region with high sensitivity, which is insensitive to polarization and incident angle. The proposed nanostructure is sensitive to the change of the refractive index of the substance to be tested. We established the correspondence between the change of the refractive index and the peak position of the reflection spectrum. And then we propose an optical refractive index sensor with a sensitivity of 986 nm/RIU, and a maximum figure of merit of 32.7, which is much higher compared to the sensor based on metallic materials. The maximum Q-factor can reach 520. This study may provide a further step in optical sensing, biosensing and environmental monitoring.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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