Direct Laser Writing Polymer Micro-Resonators for Refractive Index Sensors

被引：34
作者：
Wei, Heming [1 ]
Krishnaswamy, Sridhar [1 ]
机构：
[1] Northwestern Univ, Dept Mech Engn, Ctr Smart Struct & Mat, Evanston, IL 60208 USA
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2016年 / 28卷 / 24期
关键词：
Polymer micro-resonator; direct laser writing; tapered waveguide; integrated optics devices; LABEL-FREE; OPTICAL MICROCAVITIES; WAVE-GUIDES; SILICON; LENS;
D O I：
10.1109/LPT.2016.2623814
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A sensitive refractometric polymer micro-resonator sensor is fabricated using direct laser writing. The design consists of two tapered waveguides that can be directly coupled by single mode fibers, two "Y" splitting waveguides that are combined in a Mach-Zehnder interferometer (MZI) configuration and a micro-cylinder that evanescently couples with the arms of the MZI. The resonant wavelength shifts in response to the refractive index change in the surrounding medium of the micro-cylinder. The strong interaction between the medium and the whispering gallery mode results in a sensitivity of 154.84 nm/RIU (refractive index units), which demonstrates that such micro-resonators can be used for measurements of refractive index of liquids.
引用
收藏
页码：2819 / 2822
页数：4
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