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ABSTRACT Current charge‐coupled devices and complementary metal‐oxide‐semiconductor sensors often fail to simultaneously capture ultraviolet (UV), visible (VIS), and near‐infrared (NIR) signals. Imaging systems capable of operating across multiple spectral bands are essential for a wide range of applications, but existing technologies struggle under complex lighting conditions with strong glare and background interference. To address these challenges, we present a bio‐inspired multi‐band single‐pixel photodetector hat combines UV, VIS, and NIR imaging capabilities in a compact, self‐powered design. The proposed detector employs dual‐mode architecture that enables wavelength‐selective photoresponse, switching between spectral bands without the need for external bias voltages. Experimental results show a responsivity of 0.12 A/W at 380 nm (UV), 0.16 A/W at 500 nm (VIS) and 0.4 A/W at 840 nm (NIR), with specific detectivities of 7.2 × 10 1 1 , 1 × 10 1 2 , and 5.28 × 10 1 2 Jones at 380, 500, and 840 nm, respectively. To overcome the spatial resolution limitations of single‐pixel detectors, we integrate single‐pixel imaging (SPI) technology, which computationally reconstructs high‐resolution images from sparse data. This combination of dual‐mode detection and SPI enables robust imaging under complex lighting conditions, offering a powerful solution for fields such as autonomous driving, environmental monitoring, and medical diagnostics.
Xu et al. (Wed,) studied this question.