Rapid sensing of hidden objects and defects using a single-pixel diffractive terahertz sensor.

ABSTRACT: Terahertz waves offer advantages for nondestructive detection of hidden objects/defects in materials, as they can penetrate most optically-opaque materials. However, existing terahertz inspection systems face throughput and accuracy restrictions due to their limited imaging speed and resolution. Furthermore, machine-vision-based systems using large-pixel-count imaging encounter bottlenecks due to their data storage, transmission and processing requirements. Here, we report a diffractive sensor that rapidly detects hidden defects/objects within a 3D sample using a single-pixel terahertz detector, eliminating sample scanning or image formation/processing. Leveraging deep-learning-optimized diffractive layers, this diffractive sensor can all-optically probe the 3D structural information of sa

SUBMITTER: Li J 

PROVIDER: S-EPMC10600253 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature