Design Strategies Toward Plasmon-Enhanced 2-Dimensional Material Photodetectors

Two-dimensional (2D) materials have become more advantageous compared with traditional semiconductor materials for fabrication of modern photodetectors operating at room temperature and possessing small volume and low power consumption. However, the weak absorption caused by atomic thickness severely limits the performance of photodetectors employing 2D materials as active channels. Plasmonic nanomaterials can manipulate light at subwavelength scale and have been viewed as a powerful tool to achieve enhanced photoresponse in semiconductor devices. In this review, the rational design strategies of plasmon-enhanced 2D material photodetectors are comprehensively introduced, where the hybrid nanostructures are classified based on different coupling modes between plasmonic nanostructures and 2D materials. This review has a great chance to provide an instructive reference for understanding and engineering plasmonic effects toward high-performance 2D material photodetectors.