Enhanced photogating gain in scalable MoS2 plasmonic photodetectors via resonant metasurfaces

Here, we introduce a novel demonstration of utilizing scalable nitride-based resonant plasmonic metasurfaces, with a work function of 4.7 eV, to dramatically augment the light-matter interaction in wafer-scale monolayer single-crystal MoS2 photodetectors. Our pioneering approach has achieved not only excellent responsivity but also an impressive detectivity of 2.58 × 1012 Jones via the plasmon-enhanced photogating effect. A salient feature of this work is the introduction of a novel concept: the giant photocurrent enhancement propelled by the local-electromagnetic-field enhanced photogating effect. This leads to a substantial 190-fold photocurrent boost compared to conventional MoS2 photodetectors.