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Investigation of Fano resonance in compound resonant waveguide gratings for optical sensing

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Abstract

An optical sensor is designed to support the Fano effect based on a compound resonant waveguide grating (CRWG). The transmission spectra of the CRWG are investigated by utilizing a theoretical method that combines the temporal coupled mode theory with the eigenmode information of the grating structure. The theoretical results, which are observed to agree closely with those acquired by rigorous coupled-wave analysis, show that the linewidth of the transmission spectrum decreases upon increasing the distance between the grating strips, and the central resonance frequency decreases as the refractive index of the analyte increases. Here, the proposed CRWG structures will find potential uses in optical sensing.

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DOI:10.3788/col201715.030502

所属栏目:Diffraction and gratings

收稿日期:2016-09-20

录用日期:2016-12-23

网络出版日期:2017-01-22

作者单位    点击查看

Jinhua Hu:The School of Information &Electrical Engineering, Hebei University of Engineering, Handan 056038, China
Xiuhong Liu:The School of Mathematics &Physics, Hebei University of Engineering, Handan 056038, China
Jijun Zhao:The School of Information &Electrical Engineering, Hebei University of Engineering, Handan 056038, China
and Jun Zou:College of Science, Zhejiang University of Technology, Hangzhou 3 10023 , China

联系人作者:联系作者(liuxiuhong@hebeu.edu.cn)

备注:This work was supported by the Scientific Research Projects of the Department of Education of Hebei Province (Nos. QN2014134 and QN2016090), the Natural Science Foundation of Hebei Province (No. A2015402035), and the National Natural Science Foundation of China (NSFC) (No. 61605172).

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引用该论文

Jinhua Hu, Xiuhong Liu, Jijun Zhao, and Jun Zou, "Investigation of Fano resonance in compound resonant waveguide gratings for optical sensing," Chinese Optics Letters 15(3), 030502 (2017)

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