High performance multifunction‐in‐one optoelectronic device by integrating graphene/MoS <sub>2</sub> heterostructures on side‐polished fiber
Linqing Zhuo, Dongquan Li, Weidong Chen, Yu Zhang, Wang Zhang, Ziqi Lin, Huadan Zheng, Wenguo Zhu, Yongchun Zhong, Jieyuan Tang, Guoguang Lu, Wenxiao Fang, Jianhui Yu, Zhe Chen
Abstract
Abstract Two‐dimensional (2D) materials exhibit fascinating and outstanding optoelectronic properties, laying the foundation for the development of novel optoelectronic devices. However, ultra‐weak light absorption of 2D materials limits the performance of the optoelectronic devices. Here, a structure of MoS 2 /graphene/Au integrated onto the side‐polished fiber (SPF) is proposed to achieve a high‐performance fiber‐integrated multifunction‐in‐one optoelectronic device. It is found that the device can absorb the transverse magnetic (TM) mode guided in the SPF and generate photocurrents as a polarization‐sensitive photodetector, while the transverse electric (TE) mode passes with low loss through the device, making the device simultaneously a polarizer. In the device, the MoS 2 film and the Au finger electrode can enhance the TM absorption by 1.75 times and 24.8 times, respectively, thus allowing to achieve high performance: a high photoresponsivity of 2.2 × 10 5 A/W at 1550 nm; the external quantum efficiency (EQE) of 1.76 × 10 7 %; a high photocurrent polarization ratio of 0.686 and a polarization efficiency of 3.9 dB/mm at C‐band. The integration of 2D materials on SPF paves the way to enhance the light–2D material interaction and achieve high performance multifunction‐in‐one fiber‐integrated optoelectronic devices.