Waveguide asymmetric long-period grating couplers as refractive index sensors

被引：14

作者：

Hovik, Jens ^{[1
]}

Yadav, Mukesh ^{[1
]}

Noh, Jong Wook ^{[1
]}

Aksnes, Astrid ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Elect Syst, Trondheim, Norway

来源：

OPTICS EXPRESS | 2020年 / 28卷 / 16期

关键词：

MACH-ZEHNDER INTERFEROMETER; FIBER GRATINGS; RESONATOR; DESIGN; FABRICATION; MODES; STRIP;

D O I：

10.1364/OE.397561

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A highly sensitive integrated photonic transducer is designed by utilizing asymmetric long-period gratings on a silicon waveguide. These gratings are formed by periodic perturbation of the waveguide width, leading to coupling between the fundamental mode and the 1st order asymmetric leaky mode. The coupled modes are studied via finite-element and finite-difference time-domain methods. Only a single fabrication step is required to realize this novel design. The device is utilized as a refractive index sensor in liquid, yielding a sensitivity of 5078 nm/RIU. The design is a unique combination of being highly sensitive, easily fabricated and highly compact. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：23936 / 23949

页数：14

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