Light-Programmed Robust Transport via Photon-Assisted Tunneling in a van der Waals Heterostructure.

Ensuring signal fidelity and output stability against electrical noise is a central challenge for optoelectronic sensing-computing systems. However, conventional optoelectronic devices often suffer from output instability due to input voltage fluctuations. This limitation hinders the realization of multifunctional logic operations with high interference immunity in a single device. Here, we propose a photon-assisted Fowler-Nordheim tunneling regulator based on a SnS2/WSe2 van der Waals heterostructure. Through a gate-activated, light-programming strategy, the device achieves a voltage-immune constant current output. Leveraging these intrinsic physical properties, reconfigurable logic units were constructed. The NOT logic gate achieves a switching ratio of up to 104, while the robust NAND logic gate exhibits remarkable noise immunity (coefficient of variation, CV ∼ 1%), effectively filtering noise jitter from input signals to ensure precise logic output. This work applies the photon-assisted tunneling effect to both analog signal conditioning and digital logic operations, highlighting the immense potential of light as a programming tool for quantum transport processes and providing a distinct device prototype for the development of interference-resistant and multimodal integrated on-chip optoelectronic systems.