Towards an all-in fiber photodetector by directly bonding few-layer molybdenum disulfide to a fiber facet.

Although photodetectors based on two dimensional (2D) materials have been intensively studied, there are few reports of optical fiber compatible devices. Herein we successfully fabricated an all-in fiber photodetector (FPD) based on an end-face bonded with few-layer molybdenum disulfide (MoS). Our FPD has a considerably high photo-responsivity of ∼0.