Open AccessHighly sensitive all-optical control of light in WS2 coated microfiber knot resonator
Author(s) -
Guowei Chen,
Zijian Zhang,
Xiaoli Wang,
Hanguang Li,
Mengjiang Jiang,
Heyuan Guan,
Wentao Qiu,
Huihui Lu,
Jiangli Dong,
Wenguo Zhu,
Yi Zhong,
Yunhan Luo,
Jun Zhang,
Zhe Chen
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.027650
Subject(s) - optics , microfiber , materials science , resonator , optoelectronics , refractive index , optical fiber , green light , digital light processing , physics , blue light , composite material , projector
All-optical light-control-light functionality is realized in a layered tungsten disulfide (WS 2 ) nanosheet coated microfiber knot resonator (MKR) structure. Mainly due to the photon generated excitons induced refractive index variation in WS 2 nanosheets, a large variation in the transmitted power (∆T) can be observed under external violet/red laser excitation. The ∆T variation rates can reach up to ~0.4 dB/mW under violet pump light excitation whereas the state of the art light-control-light structures usually has a variation rate of less than 0.25 dB/mW. In terms of the response time, the averaged rise/fall time is ~0.12/0.1 s. The demonstrated structure has the advantages of easy fabrication, low cost and high sensitivity, therefore, it might be a promising candidate for building future all-fiber-optics based functional devices and all-optical circuitry.