Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing

被引：10

作者：

Gu, Hongjun ^{[1
,2
]}

Gong, He ^{[1
,2
]}

Wang, Chunxue ^{[1
]}

Sun, Xiaoqiang ^{[1
]}

Wang, Xibin ^{[1
]}

Yi, Yunji ^{[1
]}

Chen, Changming ^{[1
]}

Wang, Fei ^{[1
]}

Zhang, Daming ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

[2] Jilin Agr Univ, Coll Informat Technol, 2888 Xincheng St, Changchun 130118, Jilin, Peoples R China

来源：

SENSORS | 2019年 / 19卷 / 22期

基金：

中国国家自然科学基金;

关键词：

microring resonator; inner-wall grating; slot waveguide; label-free; bulk sensing; OPTICAL BIOCHEMICAL SENSOR; SMS FIBER STRUCTURE; WAVE-GUIDE; DESIGN; OPTIMIZATION;

D O I：

10.3390/s19225038

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 mu m x 13 mu m on the silicon-on-insulator (SOI) platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. The IG-SMRR has an ultra-large quasi-FSR of 84.5 nm as the detection range, and enlarged factor is up to over 3 compared with the conventional SMRR. The concentration sensitivities of sodium chloride solutions and D-glucose solutions are 996.91 pm/% and 968.05 pm/%, respectively, and the corresponding refractive index (RI) sensitivities are 559.5 nm/RIU (refractive index unit) and 558.3 nm/RIU, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future.

引用

页数：12

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