Bioinspired Selective Perception Through On‐Chip Te/Ag Integration and Interface Interference

Infrared sensing in the 1–4 µm band is of great significance in fields such as thermal detection and flame identification. However, in practical applications, this band is often disturbed by strong visible solar background radiation, leading to a reduction in signal‐to‐noise ratio. Here, inspired by jewel beetles, which use specialized thoracic pit organs to block visible light and transmit infrared radiation for forest fire detection, we present an on‐chip recognition strategy based on tellurium/silver hybrid films. The optimized films exhibit high infrared transmittance (91.5% at 2400 nm) while strongly suppressing visible light (20.6% at 400 nm) based on the interface interference effect. Leveraging this bio‐inspired spectral selectivity, we demonstrate a highly compact sensing platform integrated with a low‐cost integrated microcontroller unit running a lightweight multilayer perceptron network (0.6 kB, 149 parameters) for real‐time gesture recognition. Under the interference of visible light at 405 nm, this device achieves an on‐chip recognition accuracy up to 98.8%, significantly outperforming the pristine device (50.9%). This low‐cost and transferable bio‐inspired integration provides a practical pathway toward robust non‐contact sensing for human‐machine interaction applications.