Accurate determination of the quality factor and tunneling distance of axisymmetric resonators for biosensing applications
Accurate determination of the quality factor and tunneling distance of axisymmetric resonators for biosensing applications
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DOI：
10.1364/oe.21.008724
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发表时间：
2013-04-08
期刊：
影响因子：
3.8
通讯作者：
Kirk, Andrew G.
中科院分区：
文献类型：
--
作者：
Cheema, M. Imran;Kirk, Andrew G.
由于超高质量因子(10(6)- 10(9))，轴对称光学微腔是生物传感应用的热门平台。最近有研究表明，微腔生物传感器可以利用相移腔衰荡光谱（PS-CRDS）跟踪生物检测事件作为其质量因子的函数。然而，为了获得最大的灵敏度，有必要对给定的传感应用的微腔参数进行优化。在这里，我们介绍了一个改进的有限元模型，使我们能够确定PS-CRDS传感器的优化几何形状。改进后的模型不仅可以快速准确地确定质量因子，而且可以确定轴对称谐振器的隧穿距离。对改进的模型进行了数值、分析和实验验证。(c) 2013年美国光学学会
Due to ultra high quality factor (10(6) - 10(9)), axisymmetric optical microcavities are popular platforms for biosensing applications. It has been recently demonstrated that a microcavity biosensor can track a biodetection event as a function of its quality factor by using phase shift cavity ring down spectroscopy (PS-CRDS). However, to achieve maximum sensitivity, it is necessary to optimize the microcavity parameters for a given sensing application. Here, we introduce an improved finite element model which allows us to determine the optimized geometry for the PS-CRDS sensor. The improved model not only provides fast and accurate determination of quality factors but also determines the tunneling distance of axisymmetric resonators. The improved model is validated numerically, analytically, and experimentally. (c) 2013 Optical Society of America