基于磁光硅基微环波导的磁场测量研究  

Magnetic field measurement based on magneto-optical micro-ring silicon waveguides

作　　者：喻刚[1] 武保剑[1] 文峰[1] 周恒[1] 邱昆[1] YU Gang;WU Bao-jian;WEN Feng;ZHOU Heng;QIU Kun(Key Laboratory of Optical Fiber Sensing & Communication of the Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China)

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,四川成都611731

出　　处：《磁性材料及器件》2017年第1期1-4,32,共5页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(61271166);教育部长江学者和创新团发展计划基金资助项目(IRT1218)

摘　　要：根据磁光效应引起的附加介电常数张量,分析了磁光波导中导波光传播特性对光场模式和磁场配置的依赖关系。采用SiO_2/Si-Ce:YIG/SiO_2硅基磁光波导设计了一种微环谐振结构用于磁场测量,仿真计算了准TE模导波光传输时微环谐振波长移动随垂直磁化强度的变化。对于半径为23.6μm的磁光微环,优化波导宽度可使磁场测量灵敏度达到0.0054nm/(k A/m),饱和磁化时微环谐振波长移动为0.52nm。According to the additional permittivity tensor induced by the magneto-optical(MO)effect,we analyze the dependence of propagation characteristics of guided optical waves in MO waveguides on the optical field distribution and the configuration of applied magnetic field.The silicon-based micro-ring resonator(MRR)composed of the MO waveguide of SiO2/Si-Ce:YIG/SiO2is designed for magnetic field measurement.The resonant wavelength shift varying with normal magnetization for the quasi-TE mode in the MO-MRR waveguide is simulated.For the MO-MRR withradius of23.6μm,the magnetic field measurement sensitivity can be achieved to be0.0054nm/(kA/m)by optimizing the waveguide width and the resonant wavelength shift is up to0.52nm for saturated magnetization.

关 键 词：磁光效应 微扰理论 微环谐振器 磁场测量 

分 类 号：O482.55[理学—固体物理] TM937[理学—物理]