Premium
Graphene Heterostructure Integrated Optical Fiber Bragg Grating for Light Motion Tracking and Ultrabroadband Photodetection from 400 nm to 10.768 µm
Author(s) -
Shivananju Bannur Nanjunda,
Bao Xiaozhi,
Yu Wenzhi,
Yuan Jian,
Mu Haoran,
Sun Tian,
Xue Tianyu,
Zhang Yupeng,
Liang Zhongzhu,
Kan Ruifeng,
Zhang Han,
Lin Bo,
Li Shaojuan,
Bao Qiaoliang
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201807274
Subject(s) - materials science , optoelectronics , graphene , photodetection , nanophotonics , optics , photodetector , fiber bragg grating , photonics , visible spectrum , wavelength , physics , nanotechnology
Abstract Integrated photonics and optoelectronics devices based on graphene and related 2D materials are at the core of the future industrial revolution, facilitating compact and flexible nanophotonic devices. Tracking and detecting the motion of broadband light in millimeter to nanometer scale is an unfold science which has not been fully explored. In this work, tracking and detecting the motion of light (millimeter precision) is first demonstrated by integrating graphene with an optical fiber Bragg grating device (graphene‐FBG). When the incident light moves toward and away from the graphene‐FBG device, the Bragg wavelength red‐shifts and blue‐shifts, indicating its light motion tracking ability. Such light tracking capability can be further extended to an ultrabroad wavelength range as all‐optical photodetectors show the robust response from 400 nm to 10.768 µm with a linear optical response. Interestingly, it is found that graphene‐Bi 2 Te 3 heterostructure on FBG shows 87% higher photoresponse than graphene‐FBG at both visible and telecom wavelengths, due to stronger phonon‐electron coupling and photo‐thermal conversion in the heterostructure. The device also shows superior stability even after 100 d. This work may open up amazing integrated nanophotonics applications such as astrophysics, optical communication, optical computing, optical logic gating, spectroscopy, and laser biology.