One of the most important parts in the modern communication system is optical fibers. By reducing the fiber diameter to microfibers, it can extend the scope of the fiber. And it will facilitate light-matter interaction applications. Because the resonance property can be tuned by external stimuli that the microfiber knot resonator (MKR) can be an excellent one among different microfibers based structures1,2. In addition to the structure, WS2 as a two-dimensional material has a lot of strong points. Like high electron mobility, high on/off ratio and tunable refractive index by light absorption in the visible regime3,4.

© 2019 Japan Society of Applied Physics, The Optical Society (OSA)

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