Chinese Optics Letters, 2017, 15 (3): 030502, Published Online: Jul. 25, 2018   

Investigation of Fano resonance in compound resonant waveguide gratings for optical sensing Download: 830次

Author Affiliations
1 The School of Information & Electrical Engineering, Hebei University of Engineering, Handan 056038, China
2 The School of Mathematics & Physics, Hebei University of Engineering, Handan 056038, China
3 College of Science, Zhejiang University of Technology, Hangzhou 310023, China
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.

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

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