title: Optical Analog to Electromagnetically Induced Transparency in Cascaded Ring-Resonator Systems.
abstract: The analogue of electromagnetically induced transparency in optical methods has shown great potential in slow light and sensing applications. Here, we experimentally demonstrated a coupled resonator induced transparency system with three cascaded ring coupled resonators in a silicon chip. The structure was modeled by using the transfer matrix method. Influences of various parameters including coupling ratio of couplers, waveguide loss and additional loss of couplers on transmission characteristic and group index have been investigated theoretically and numerically in detail. The transmission character of the system was measured by the vertical grating coupling method. The enhanced quality factor reached 1.22 × 10⁵. In addition, we further test the temperature performance of the device. The results provide a new method for the manipulation of light in highly integrated optical circuits and sensing applications.
authors.affiliation: Key Laboratory of Instrumentation Science &amp; Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. huazaisss@foxmail.com.
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Instrumentation Science &amp; Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. 18334792568@163.com.
authors.forename: Hua
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Instrumentation Science &amp; Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. xuechenyang@nuc.edu.cn.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Xue
authors.affiliation: Key Laboratory of Instrumentation Science &amp; Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. wdzhang@nuc.edu.cn.
authors.forename: Wendong
authors.initials: W
authors.lastname: Zhang
keywords: coupled resonator induced transparency; electromagnetically induced transparency; ring resornator; silicon waveguide