Simulation and optimization of multilayer-coated microsphere in temperature and refractive index sensing
Simulation and optimization of multilayer-coated microsphere in temperature and refractive index sensing
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DOI：
10.1016/j.optcom.2015.01.050
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发表时间：
2015-06-01
影响因子：
2.4
通讯作者：
Jin, Xueying
中科院分区：
文献类型：
--
作者：
Dong, Yongchao;Wang, Keyi;Jin, Xueying
本研究提出一种利用三层镀膜微球谐振腔同时检测折射率和温度变化的方法。三层的RI从内到外依次为高、低、高。利用微扰理论和有限元方法，分别建立了计算内模和外模折射率和温度灵敏度的模型。因此，二阶传感矩阵被定义为确定RI和温度变化。通过优化涂层厚度，利用外模和内模的频率差，可以消除热噪声。(C)2015 Elsevier B.V.版权所有。
This study proposes an approach to simultaneously detect the refractive-index (RI) and temperature changes with a three-layer-coated microsphere resonator. The RIs of the three layers are high, low, and high from inside to outside. Using the perturbation theory and finite element method (FEM), a model is developed to calculate the RI and temperature sensitivities for the inner mode and outer mode, respectively. As a result, a second-order sensing matrix is defined to determine the RI and temperature changes. By optimizing the coatings thickness, the thermal noise can be eliminated with the differential frequency of outer and inner modes. (C) 2015 Elsevier B.V. All rights reserved.