LIU Chun-juan， MU Zhou， WU Xiao-suo， ZHENG Li-jun
（School of Electronic Information and Engineering, Lanzhou Jiaotong University, Lanzhou 730070， China）
Abstract： The transmission equation of microdisk resonator is obtained by the transfer matrix method. The physical model is built and the electric field distribution, output spectrum and phase of the microdisk resonator are simulated by three-dimensional finite element software. The influence of the structural parameters on transmission characteristics and the temperature sensing property of the microdisk resonator are studied deeply. The results show that the output spectrum will change significantly with the distance between the microdisk and the straight waveguide within a certain range but there is no apparent change in the phase of the output port. The extinction ratio and maxima sensitivity of the device will reach 30 dB and 45 pm/℃, respectively. Microdisk has higher integration, higher quality factor and wider free spectral range compared with common microring resonator.
Key words： microdisk; whispering gallery mode; transfer matrix method; temperature sensing
CLD number： TP273doi： 10.3969/j.issn.1674-8042.2020.03.012
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微盘谐振器的温度传感特性研究
刘春娟， 穆洲， 吴小所， 郑丽君
（兰州交通大学 电子与信息工程学院， 甘肃 兰州 730070）
摘要： 采用传输矩阵法推导了微盘谐振器的传输方程， 利用三维有限元软件建立了微盘谐振器的物理模型并对其电场分布、 输出光谱和相位变化进行了模拟。 分析了微盘结构参数对传输特性的影响， 并基于该物理模型参数研究了温度传感特性。 结果表明， 当微盘与直波导的间距在一定范围内变化时， 输出光谱会发生变化， 而输出端口相位变化不大； 器件消光比可达30 dB， 灵敏度最高为45 pm/℃。 与普通微环谐振器相比， 微盘具有更高的集成度、 品质因数和更宽的自由光谱范围。
关键词： 微盘； 回音壁模式； 传输矩阵法； 温度传感
引用格式：LIU Chun-juan， MU Zhou， WU Xiao-suo， et al. Temperature sensing property of microdisk resonator. Journal of Measurement Science and Instrumentation, 2020, 11（3）： 285-289. ［doi： 10.3969／j.issn.1674-8042.2020.03.012］
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