Highly-sensitive silicon-on-insulator sensor based on two cascaded micro-ring resonators with vernier effect

被引：110
|
作者：
Jin, Lei [1 ]
Li, Mingyu [1 ]
He, Jian-Jun [1 ]
机构：
[1] Zhejiang Univ, Ctr Integrated Optoelect, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2011年 / 284卷 / 01期
关键词：
Optical sensor; Silicon-on-insulator; Cascaded micro-rings resonator;
D O I：
10.1016/j.optcom.2010.08.035
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A highly-sensitive integrated optical biosensor based on two cascaded micro-rings resonator (MRR) is investigated theoretically and experimentally. The free spectral ranges (FSRs) of two cascaded micro-rings are designed to be slightly different in order to generate Vernier effect. A preliminary investigation of our sensor with a Q factor of 2 x 10(4) using different ethanol concentrations shows that the Vernier effect can improve the sensitivity to 1300 nm per refractive index unit (RIU). compared to 62 nm/RIU for a single ring sensor. The sensor also has a large measurement range of refractive index change up to 1.15 x 10(-2) RIU. It can be useful for low-cost and highly-sensitive optical biosensor system. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：156 / 159
页数：4
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