Proof of concept of a graphene-based reconfigurable frequency multiplier fabricated within the 2D Experimental Pilot Line

Graphene intrinsic carrier ambipolarity enables unique circuit functionalities that would otherwise require significantly more complex circuit topologies to achieve with conventional semiconductors. Yet, translating these properties into practical, wafer-scale electronic systems remains a significant challenge. Here, we present an experimental proof of concept of a reconfigurable frequency multiplier based on a single split-gate graphene field-effect transistor. The devices used for this demonstration were externally fabricated through a multi-project wafer tape-out of the 2D Experimental Pilot Line, an initiative aimed at providing a scalable platform service for the manufacturing of 2D-material-based devices and circuits. The split-gate architecture synthesizes a W-shaped transfer characteristic within a single device enabling electrically reconfigurable frequency multiplication by factors of × 2, × 3, and × 4 without requiring multiple transistors or fixed fabrication-dependent tuning mechanisms. Time-domain measurements and spectral analysis confirm harmonic reconfiguration, yielding spectral purities of 48% for the doubler, 69% for the tripler, and 19% for the quadrupler at an input frequency of 100 kHz. This constitutes the first demonstration of a reconfigurable circuit using devices from the multi-project wafer 2D-EPL platform, representing a step forward in the integration complexity achievable with wafer-scale graphene technology.