High-sensitivity temperature sensor based on Fano resonance in an optofluidic microcapillary resonator

Zhu Xiangshang; Zhan Zhijian; Li Jun; Li Mi; Song Yuejiang

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High-sensitivity temperature sensor based on Fano resonance in an optofluidic microcapillary resonator

机译：基于Fano谐振中的高灵敏度温度传感器在优化微量微血管谐振器中

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In this paper we demonstrate a high-sensitivity temperature sensor based on high-order Fano resonance (FR) in an optofluidic microcapillary resonator. High-order FR modes (Q similar to 3000) are excited in an ethanol-filled optofluidic microcapillary resonator for temperature sensing. Due to the high thermo-optic coefficient of ethanol and a large energy fraction of high-order modes in the core liquid, the sensitivity as high as 0.402 nm/degrees C and the detection limit of 0.026 degrees C can be achieved. Also the sensitivity and free spectral range of different order radial modes are calculated theoretically. The experimental results agree well with the theoretical results. Through the comparison between the theoretical and experimental results, the radial order number of the mode used for temperature sensing is estimated to be 10. (C) 2020 Optical Society of America

机译：在本文中，我们展示了一种基于高阶Fano共振（FR）的高灵敏度温度传感器，在邻接微孔谐振器中。高阶FR模式（Q类似于3000）在乙醇填充的替代金流体微血管谐振器中兴奋，用于温度感测。由于乙醇的高热视神经系数和芯液中的高阶模式的大能量分数，可以实现高达0.402nm /℃的敏感性和0.026℃的检测限。此外，从理论上计算不同阶径向模式的灵敏度和自由谱范围。实验结果与理论结果很好。通过对理论和实验结果之间的比较，估计用于温度传感的模式的径向峰值数量为10.（c）2020美国光学学会

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来源
《Applied optics》 |2020年第5期|共4页
作者
Zhu Xiangshang; Zhan Zhijian; Li Jun; Li Mi; Song Yuejiang;
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作者单位

Nanjing Univ Key Lab Intelligent Opt Sensing &

Manipulat Coll Engn &

Appl Sci Nanjing 210093 Peoples R China;

Nanjing Univ Key Lab Intelligent Opt Sensing &

Manipulat Coll Engn &

Appl Sci Nanjing 210093 Peoples R China;

Nanjing Univ Key Lab Intelligent Opt Sensing &

Manipulat Coll Engn &

Appl Sci Nanjing 210093 Peoples R China;

Nanjing Univ Key Lab Intelligent Opt Sensing &

Manipulat Coll Engn &

Appl Sci Nanjing 210093 Peoples R China;

Nanjing Univ Key Lab Intelligent Opt Sensing &

Manipulat Coll Engn &

Appl Sci Nanjing 210093 Peoples R China;

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High-sensitivity temperature sensor based on Fano resonance in an optofluidic microcapillary resonator

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