Conventional spectrally reconfigurable systems for dynamic optical information processing suffer from inherent limitations, including bulky optical components and constrained control flexibility. Here, we report an adaptive photodetector based on WSe2/CdS heterostructures, enabling device-level dual-freedom reconfigurability of spectral response. Density functional theory calculations confirm type-I band alignment at the heterointerface, while experimental results demonstrate voltage-driven switching between Fowler–Nordheim tunneling and direct tunneling transport mechanisms. By modulating gate/bias voltage, the spectral-response band can be dynamically reconfigured across blue, green, and blue-green dual-band regimes, achieving a rapid switching speed of 2 ms. This reconfigurable spectral response allows a single device to integrate intelligent imaging and secure communication functions. The demonstrated dual-freedom reconfigurability provides a scalable pathway toward next-generation on-chip multispectral systems with minimized footprint and enhanced functional versatility.
Wang et al. (2026) studied this question.