Abstract

A grating-based Fabry–Perot (FP) cavity-coupled microring resonator on a silicon chip is reported to demonstrate an all-optically tunable Fano resonance. In the device, an add-drop microring resonator (MRR) is employed, and one of the two bus waveguides is replaced by an FP cavity consisting of two sidewall Bragg gratings. By choosing the parameters of the gratings, the resonant mode of the FP cavity is coupled to one of the resonant modes of the MRR. Due to the coupling between the resonant modes, a Fano resonance with an asymmetric line shape resulted. Measurement results show a Fano resonance with an extinction ratio of 22.54 dB, and a slope rate of 250.4 dB/nm is achieved. A further study of the effect of the coupling on the Fano resonance is performed numerically and experimentally. Thanks to the strong light-confinement capacity of the MRR and the FP cavity, a strong two-photon absorption induced nonlinear thermal-optic effect resulted, which is used to tune the Fano resonance optically.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Compact tunable electromagnetically induced transparency and Fano resonance on silicon platform

Shuang Zheng, Zhengsen Ruan, Shengqian Gao, Yun Long, Shimao Li, Mingbo He, Nan Zhou, Jing Du, Li Shen, Xinlun Cai, and Jian Wang
Opt. Express 25(21) 25655-25662 (2017)

Tunable Fano resonances based on microring resonator with feedback coupled waveguide

Guolin Zhao, Ting Zhao, Huifu Xiao, Zilong Liu, Guipeng Liu, Jianhong Yang, Zhaoyu Ren, Jintao Bai, and Yonghui Tian
Opt. Express 24(18) 20187-20195 (2016)

Independently tunable double Fano resonances based on waveguide-coupled cavities

Ting Zhao, Huifu Xiao, Yingtao Li, Jianhong Yang, Hao Jia, Guanghui Ren, Arnan Mitchell, and Yonghui Tian
Opt. Lett. 44(12) 3154-3157 (2019)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription