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The development of three-dimensional (3D) space light angle detection is vital in optical technology for applications such as 3D imaging, computer vision, and augmented reality. Current methods involve advanced sensors and algorithms, including time-of-flight cameras, which need multiple cameras and light sources to improve accuracy. However, it is a great challenge to integrate these complex components into compact devices. Subwavelength semiconductor structures offer optical resonance characteristics, enabling precise light–matter interaction regulation. A 3D star-like photodetector, fabricated using a template assistant printing strategy, demonstrates optical resonances of the subwavelength facade and the shielding effect of spatial arrangement. It achieves light angle detection with the resolution of 10° in vertical space and the resolution of 36° in horizontal space, making it a promising prototype for various applications.
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