ABSTRACT In this work, we incorporated Bragg gratings in the standard ring resonator design in order to enhance the sensitivity of the refractive index sensor. The transmission spectrum and electric field distribution of the device are simulated using the finite element method (FEM). The numerical simulation results obtained from the transmission spectrum are used to examine the sensing characteristics of the structure. The size of the grating teeth has a significant effect on the intensification of surface plasmons which in turns enhances the interaction between the ambient medium and the light. Bragg grating embedded resonator cavity design has the best sensitivity, FOM and Q-factor of 1680 nm/RIU, 48 and 48.4, respectively which is much higher than several previously reported values.

中文翻译：

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基于等离子体布拉格光栅嵌入式谐振腔传感器的环境折射率无标记检测

摘要 在这项工作中，我们在标准环形谐振器设计中加入了布拉格光栅，以提高折射率传感器的灵敏度。使用有限元法（FEM）对器件的透射光谱和电场分布进行了模拟。从透射光谱获得的数值模拟结果用于检查结构的传感特性。光栅齿的大小对表面等离子体激元的增强有显着影响，这反过来又增强了环境介质和光之间的相互作用。布拉格光栅嵌入式谐振腔设计具有最佳灵敏度、FOM 和 Q 因子，分别为 1680 nm/RIU、48 和 48.4，远高于之前报道的几个值。