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High-sensitivity refractive index sensor based on Ge–Sb–Se chalcogenide microring resonator
Infrared Physics & Technology ( IF 3.1 ) Pub Date : 2021-05-28 , DOI: 10.1016/j.infrared.2021.103792
Wei Huang , Ye Luo , Wei Zhang , Chengdong Li , Lan Li , ZHen Yang , Peipeng Xu

In this article, we report a liquid sensing device based on a Ge–Sb–Se microring resonator (MRR) operating at a wavelength of 1550 nm. The transmission loss of the waveguide is 4.3 dB/cm, and the intrinsic Q factor of the MRR is 7.74 × 104, with an extinction ratio of approximately 40 dB. By detecting the different concentrations of NaCl solutions, we observe that the sensitivity of our proposed device is approximately 123 nm/RIU, and the intrinsic limit of detection is approximately 3.24 × 10−4 RIU. Compared with the other materials, such as silicon, Si3N4, or polymer, the moderate refractive index (RI) of Ge28Sb12Se60 glass allows it to obtain a high sensitivity and a high Q factor, while maintaining a strong confinement on the light field to avoid suffering from bending loss under a small bending radius, with a compact structure.



中文翻译:

基于Ge-Sb-Se硫族化物微环谐振器的高灵敏度折射率传感器

在本文中,我们报告了一种基于 Ge-Sb-Se 微环谐振器 (MRR) 工作在 1550 nm 波长的液体传感装置。波导的传输损耗为 4.3 dB/cm,MRR的固有Q因子为 7.74 × 10 4,消光比约为 40 dB。通过检测不同浓度的 NaCl 溶液,我们观察到我们提出的装置的灵敏度约为 123 nm/RIU,检测的固有极限约为 3.24 × 10 -4 RIU。与硅、Si 3 N 4或聚合物等其他材料相比,Ge 28 Sb 12 Se 60的中等折射率(RI)玻璃使其获得高灵敏度和高Q因子,同时保持对光场的强限制,避免在小弯曲半径下遭受弯曲损耗,结构紧凑。

更新日期:2021-06-05
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