High-performance Microcavity Optical Sensor Connected with a Waveguide

摘要：

　　In this letter,we have numerically demonstrated a high-performance microcavity sensor which is connected with a waveguide directly.With input light and output light transmitting in the same waveguide,we propose a robust direct coupling mechanism of the microcavity.For a circular microcavity with a diameter of 4 μm and effective refractive index of 3.3,our numerical results show that the coupled modes are excited and more than 106 Q-factor is calculated from the transmission spectrum.Dramatically,the spectrum shows a Fano-shape resonance at specific wavelength.Using the Fano resonance,we detected a refractive index change on the order 10-5 and a nanoparticle with radius 5 nm.Whats more,the sensor is insensitive to waveguide width and refractive index.

作者: Shuai Liu Zhiyuan Gu Nan Zhang Shumin Xiao Qinghai Song

作者单位: Department of Electrical and Information Engineering,Shenzhen Graduate School Harbin Institute of Te Department of Material Science and Engineering,Shenzhen Graduate School Harbin Institute of Technolo Department of Electrical and Information Engineering,Shenzhen Graduate School Harbin Institute of Te

会议类型: 国际会议

会议名称: Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)

会议地点: 广州

会议语种:英文

页码: 818-821

在线出版日期: 2014-08-01（万方平台首次上网日期，不代表论文的发表时间）