纳流通道-谐振腔耦合结构测量荧光物质微位移

李霖伟; 陈智辉; 杨毅彪; 费宏明

doi:10.37188/CO.2020-0076

Volume 14 Issue 1

Jan. 2021

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Chinese Optics > 2021 > 14(1): 145-152.

LI Lin-wei, CHEN Zhi-hui, YANG Yi-biao, FEI Hong-ming. Nanofluidic channel-resonant cavity structure for measuring micro-displacement of fluorescent substances[J]. Chinese Optics, 2021, 14(1): 145-152. doi: 10.37188/CO.2020-0076

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LI Lin-wei, CHEN Zhi-hui, YANG Yi-biao, FEI Hong-ming. Nanofluidic channel-resonant cavity structure for measuring micro-displacement of fluorescent substances[J]. Chinese Optics, 2021, 14(1): 145-152. doi: 10.37188/CO.2020-0076

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Nanofluidic channel-resonant cavity structure for measuring micro-displacement of fluorescent substances

doi: 10.37188/CO.2020-0076

LI Lin-wei^{1, 2
,},
CHEN Zhi-hui^{1, 2
,
,},
YANG Yi-biao^{1, 2},
FEI Hong-ming²

1.
Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
2.
College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

Funds: Supported by National Natural Science Foundation of China (No. 11674239, No. 61575139, No. 61575138); Program for the Top Young Talents of Shanxi Province; Program for the Sanjin Outstanding Talents of China

More Information

Corresponding author: huixu@126.com
Received Date: 26 Apr 2020
Rev Recd Date: 12 May 2020

Available Online: 25 Dec 2020

Publish Date: 25 Jan 2021

Abstract

Abstract

In order to measure the micro-displacement of a fluorescent substance, we propose a nanofluidic channel-resonant cavity structure. Firstly, by using the Finite-Difference Time-Domain (FDTD) method, the influences of the quantum dot’s polarization state and structural parameters on the coupling effect of fluorescence and structure are studied and the structure is optimized. Then, the micro-displacement of the fluorescent substance is detected by measuring the change in the optical power output of the coupled structure. Finally, the factors affecting the sensitivity of the sensors are studied. The results show that, compared with the traditional method, when the refractive index of the nanofluidic channel-resonant cavity coupling structure is in the 2.8~3.3 range, the structure can sense of the micro-displacement of a fluorescent substance with high accuracy. The results also show that the sensing sensitivity can be further improved by reducing the distance between the nanofluidic channel and the resonant cavity.
- nanofluidic channel,
- resonant cavity,
- quantum dots,
- micro-displacement

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References(29)

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