摘要
In graphene-based optoelectronic devices,the ultraweak interaction between a light and monolayer graphene leads to low optical absorption and low responsivity for the photodetectors and relative high half-wave voltage for the phase modulator.Here,an integration of the monolayer graphene onto the side-polished optical fiber is demonstrated,which is capable of providing a cost-effective strategy to enhance the light–graphene interaction,allowing us to obtain a highly efficient optical absorption in graphene and achieve multifunctions:photodetection and optical phase modulation.As a photodetector,the device has ultrahigh responsivity(1.5×10^(7) A/W)and high external quantum efficiency(>1.2×10^(9)%).Additionally,the polybutadiene/polymethyl methacrylate(PMMA)film on the graphene can render the device an optical phase modulator through the large thermo-optic effect of the PMMA.As a phase modulator,the device has a relatively low half-wave voltage of 3 V with a 16 dB extinction ratio in Mach–Zehnder interferometer configuration.
基金
State Key Laboratory of Applied Optics(SKLAO-201914)
Fundamental Research Funds for the Central Universities(11618413,21619402)
Foundation for Distinguished Young Talents in Higher Education of Guangdong(2018KQNCX009)
Open Foundation of CEPREI(19D09)
Joint Fund of Pre-Research for Equipment,Ministry of Education of China(6141A02022124)
Aeronautical Science Foundation of China(201708W4001,201808W4001)
Planned Science Technology Project of Guangzhou(2016B010111003,201707010396)
Project of Guangzhou Industry Leading Talents(CXLJTD-201607)
Key-Area Research and Development Program of Guangdong Province(2015B010125007,2017A010102006,2019B010138004)
Natural Science Foundation of Guangdong Province(2016A030311019,2016A030313079,2017A030313375,2019A1515011380,2020B1515020024)
National Natural Science Foundation of China(61601404,61675092,61705086)。
