Ultra-sensitive charge detection and latch memory using MoS₂-nanoresonator-based bifurcation amplifiers

Bifurcation amplifiers are known for their extremely high sensitivity to weak input signals. We implement a bifurcation amplifier by harnessing the Duffing nonlinearity in parametrically excited MoS2 nano-electromechanical system. utilize ultra-sensitive switching response between two states of detect as well register charge-fluctuation events. demonstrate open-loop real-time detection ultra-low electrical charge perturbations magnitude <10 e at room temperature. Furthermore, we show latching resonator onto one short-lived fluctuations. These detectors offer advantages room-temperature operation and tunable radio frequency regime, which could open several possibilities quantum sensing.