Subwavelength grating waveguide racetrack-based refractive index sensor with improved figure of merit

被引：4

作者：

Sun, Yu ^{[1
]}

Hu, Guohua ^{[1
]}

Cui, Yiping ^{[1
]}

机构：

[1] Southeast Univ, Adv Photon Ctr, Sch Elect Sci & Engn, Nanjing, Jiangsu, Peoples R China

来源：

APPLIED OPTICS | 2020年 / 59卷 / 33期

基金：

中国国家自然科学基金;

关键词：

SENSITIVITY; RESONATOR; BIOSENSOR; DESIGN;

D O I：

10.1364/AO.404721

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An all-subwavelength grating waveguide-based sensing structure for figure of merit (FOM) improvement on a silicon-on-insulator platform is proposed and demonstrated. Four racetrack resonators are applied to narrow the spectrum from the drop port of a single racetrack resonator for lower full width at half-maximum, and the FOM is therefore higher through the spectrum-narrowing operation. Numerical simulation and analysis illustrate that the proposed structure is able to raise the FOM more than twice compared to a single racetrack resonator, and a high FOM of 1850.57/refractive index unit is achieved. (C) 2020 Optical Society of America

引用

页码：10613 / 10617

页数：5

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