Photonics Research, 2018, 6 (12): 12001137, Published Online: Sep. 20, 2019  

Resonance-assisted light–control–light characteristics of SnS2 on a microfiber knot resonator with fast response Download: 559次

Author Affiliations
1 Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China
2 Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China
3 e-mail: qiuwentao@jnu.edu.cn
4 e-mail: ttguanheyuan@jnu.edu.cn
Abstract
An all-optical light–control–light functionality with the structure of a microfiber knot resonator (MKR) coated with tin disulfide (SnS2) nanosheets is experimentally demonstrated. The evanescent light in the MKR [with a resonance Q of 59,000 and an extinction ratio (ER) of 26 dB] is exploited to enhance light–matter interaction by coating a two-dimensional material SnS2 nanosheet onto it. Thanks to the enhanced light–matter interaction and the strong absorption property of SnS2, the transmitted optical power can be tuned quasi-linearly with an external violet pump light power, where a transmitted optical power variation rate ΔT with respect to the violet light power of 0.22 dB/mW is obtained. In addition, the MKR structure possessing multiple resonances enables a direct experimental demonstration of the relationship between resonance properties (such as Q and ER), and the obtained ΔT variation rate with respect to the violet light power. It verifies experimentally that a higher resonance Q and a larger ER can lead to a higher ΔT variation rate. In terms of the operating speed, this device runs as fast as 3.2 ms. This kind of all-optical light–control–light functional structure may find applications in future all-optical circuitry, handheld fiber sensors, etc.

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, Zhe Chen. Resonance-assisted light–control–light characteristics of SnS2 on a microfiber knot resonator with fast response[J]. Photonics Research, 2018, 6(12): 12001137.

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