Abstract

Molybdenum telluride (MoTe₂) has attracted renewed interest owing to their versatile applications, such as transistors, logic circuits, photovoltaic cells, photodetectors, sensors, and lasers. We demonstrate an all-optically tunable microfiber knot resonator (MKR) overlaid with MoTe₂ nanosheets. The optical transmitted power (OTP), resonance wavelength, and extinction ratio of the MoTe₂ coated MKR can be tuned using external incidence pump lasers (405, 450, and 660 nm). MKR with MoTe₂ nanosheets has strong absorption in the visible regime and enhanced light–matter interaction, resulting in enhanced tuning efficiency. Assisted by thermo-optic effect and photon generated carriers, the intensity and the wavelength of the MKR can be simultaneously tuned. The tuning efficiencies of the OTP, resonance wavelength, and extinction ratio of the MKR are up to 0.5 dB/mW, 7.52 pm/mW, and 0.16 dB/mW, respectively. The response time is measured to be ∼3 ms. Theoretical simulations are performed for the MKR with and without MoTe₂, which agree well with the experimental results. The advantages of this device are all-optical tuning, easy fabrication, all-fiber content, high tuning efficiency, and fast response. This all-optical tunable MKR can find applications in all-optical circuitry, all-optical modulator, multi-dimensionally tunable optical devices, etc.

Highly sensitive all-optical control of light in WS₂ coated microfiber knot resonator

Guowei Chen, Zijian Zhang, Xiaoli Wang, Hanguang Li, Mengjiang Jiang, Heyuan Guan, Wentao Qiu, Huihui Lu, Jiangli Dong, Wenguo Zhu, Jianhui Yu, Yongchun Zhong, Yunhan Luo, Jun Zhang, and Zhe Chen
Opt. Express 26(21) 27650-27658 (2018)

Resonance-assisted light–control–light characteristics of SnS₂ on a microfiber knot resonator with fast response

Huihui Lu, Zhongmin Wang, Zhijin Huang, Jun Tao, Hanqing Xiong, Wentao Qiu, Heyuan Guan, Huazhuo Dong, Jiangli Dong, Wenguo Zhu, Jianhui Yu, Yongchun Zhong, Yunhan Luo, Jun Zhang, and Zhe Chen
Photon. Res. 6(12) 1137-1143 (2018)

All-optical tuning of a diamond micro-disk resonator on silicon

Paul Hill, Charalambos Klitis, Benoit Guilhabert, Marc Sorel, Erdan Gu, Martin D. Dawson, and Michael J. Strain
Photon. Res. 8(3) 318-324 (2020)

All light-control-light properties of molybdenum diselenide (MoSe₂)-coated-microfiber

Dao Zhang, Heyuan Guan, Wenguo Zhu, Jianhui Yu, Huihui Lu, Wentao Qiu, Jiangli Dong, Jun Zhang, Yunhan Luo, and Zhe Chen
Opt. Express 25(23) 28536-28546 (2017)

Versatile hybrid plasmonic microfiber knot resonator

Jin-Hong Li, Jin-Hui Chen, Shao-Cheng Yan, Ya-Ping Ruan, Fei Xu, and Yan-Qing Lu
Opt. Lett. 42(17) 3395-3398 (2017)