Wafer-scale 2D semimetal heterostructures enabling mid-infrared motion tracking with in-sensor perceptual compression.

Authors

Xue Li, Tianyue Wang, Dongyang Wu, Di Wu, Pei Lin, Wenxiao Wang, Haiyan Wang, Xinjian Li, Yuen Hong Tsang, Shu Ping Lau, Jiewei Chen, Longhui Zeng

Published in

Science advances. Volume 12. Issue 38. Pages eaeh4592. Sep 18, 2026. Epub Sep 18, 2026.

Abstract

Accurate motion detection and trajectory tracking are crucial for scientific and technological applications, but current techniques rely on high-pixel-density imaging arrays that demand extensive hardware and computational resources. Here, we demonstrate high-performance motion detection and tracking sensors based on in situ monolithically integrated wafer-scale telluride semimetals and germanium. Interfacial engineering enhances carrier transport while minimizing interfacial recombination, enabling room-temperature infrared detection up to 10.6 micrometers with a peak sensitivity of 91.6 millivolts per millimeter, a low nonlinearity of 5.1%, and a specific detectivity exceeding 10¹⁰ centimeter-square root hertz per watt in the mid-infrared range. These advancements facilitate real-time infrared position sensing and trajectory tracking with a resolution of 9.7 micrometers. With in-sensor compression, which achieves a 400× reduction by condensing data from 100 × 100 pixels to 5 × 5 elements, a sparse position-sensitive detector array achieves 95% accuracy in simultaneously identifying and tracking multiple dynamic targets. Our monolithically integrated semimetal sensors open avenues toward resource-efficient, precise motion analytics and perception.

PMID:
42758839
Bibliographic data and abstract were imported from PubMed on 19 Sep 2026.

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