基于波导-同心环形谐振腔模型的纳米流体荧光颗粒微位移检测  

Micro-displacement detection of nanofluidic fluorescent particles based on waveguide-concentric ring resonator model

作　　者：李长亮 陈智辉 冯光 王晓伟 杨毅彪 费宏明 孙非 刘一超 Li Chang-Liang;Chen Zhi-Hui;Feng Guang;Wang Xiao-Wei;Yang Yi-Biao;Fei Hong-Ming;Sun Fei;Liu Yi-Chao(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Department of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学,新型传感器与智能控制教育部重点实验室,太原030024 [2]太原理工大学物理与光电工程学院,太原030024

出　　处：《物理学报》2022年第20期187-194,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:62175178,11674239,61971300,61905208,11904255);中央引导地方科技发展资金项目(批准号:YDZJSX2021A013);山西省青年拔尖人才支持计划;三晋英才支持计划资助的课题。

摘　　要：对微纳流体中纳米粒子的动态跟踪与检测一直是一项具有挑战性和高要求的工作.本文提出了波导-同心环形谐振腔集成光学模型,根据波导-同心环形谐振腔耦合结构输出的荧光功率强度变化来实现对微纳流体中纳米颗粒的微位移检测.由于环形微谐振腔具有高Q以及对周围环境响应敏感的特性,因而极大提高了器件的灵敏度.使用时域有限差分法对荧光的偏振态,两个环形谐振腔的间距等参数进行了数值仿真模拟,利用荧光输出功率双峰值的变化能够对纳米粒子的微位移进行高精度的检测.基于双峰值变化的同步检测可降低环境噪声影响从而提高了检测精度,数值模拟结果也证实了此种方法可对纳米流体中纳米颗粒在0—1000 nm范围对微位移进行实时动态的测定.本工作可以为微纳流体领域传感器系统的设计提供新的方向和思路.The dynamic tracking and detecting of nanoparticles in micro-nanofluids have always been a challenging and demanding task.In this work,an integrated model of waveguide-concentric ring resonator is proposed based on the waveguide-concentric ring resonator.The change of the fluorescence power intensity outputted by the cavity coupling structure is used to realize the micro-displacement detection of nanoparticles in the micro-nano fluid.Because the ring micro-resonator has the characteristics of high Q and the sensitivity to the surrounding environment,the sensitivity of the device is greatly improved.The finite-difference time domain method is used to study the parameters such as the polarization state of the fluorescence and the distance between the two ring resonators.The double-peak change of the fluorescence output power can be used to detect the displacement of the nanoparticles with high precision.Based on the synchronization of the double-peak changes,the detection can reduce the influence of environmental noise and improve the detection accuracy.The numerical simulation results also confirm that this method can measure the micro-displacement of nanoparticles in nanofluids in a range of 0–1000 nm,providing new directions and ideas.

关 键 词：纳米粒子 微纳流体 环形谐振腔 生物检测 

分 类 号：TN492[电子电信—微电子学与固体电子学]