Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces
6 affiliations
- 1State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing China
- 2Department of Precision Instrument Tsinghua University Beijing China
- 3State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan China
- 4Beijing Institute of Tracking and Telecommunications Technology Beijing China
- 5Laboratory of Intelligent Microsystems Beijing Information Science and Technology University Beijing China
- 6Beijing Advanced Innovation Center for Integrated Circuits Tsinghua University Beijing China
Abstract
Active three‐dimensional sensing requires accurate light delivery and sufficient return‐signal strength, while complex scenes require a tunable balance between local power concentration and illumination coverage. Collimated beam illumination supports a longer maximum detectable distance by concentrating optical power, whereas expanded beam illumination improves angular sampling efficiency by increasing coverage per projection. Existing active‐illumination approaches typically use fixed illumination patterns or predefined scanning trajectories, making it difficult to balance local power concentration for maximum detectable distance with illumination coverage for sampling efficiency. Here we propose an adaptive active‐illumination method based on translationally and axially tunable cascaded metasurfaces (TATCMs). TATCMs control the beam output angle within the field of view (FoV) through lateral translation and tune illumination coverage through axial‐spacing tuning. At an operating wavelength of 905 nm, the implemented TATCMs demonstrate continuous beam‐output‐angle control across an approximately 70°×70° FoV under a ±300 µm lateral stroke, while increasing the interlayer spacing by 2.64 mm expands collimated beam illumination with a measured divergence of 0.06° to provide continuous coverage across the FoV. Adaptive three‐dimensional reconstruction further demonstrates the potential of TATCMs as a compact planar illumination platform for scene‐adaptive three‐dimensional sensing in autonomous vehicles, unmanned aerial vehicles, and industrial robotics.
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BibTeX
@article{zhang2026adaptive,
title = {{Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces}},
author = {Chi Zhang and Jianing Yang and Lingyun Zhang and Jingyu Bao and Bingbai Li and Qingsong Feng and Rui You and Xiaoli Jing and Fei Xing and Xiaoguang Zhao and Zheng You},
journal = {Advanced Science},
year = {2026},
month = oct,
doi = {10.1002/advs.78448},
url = {https://doi.org/10.1002/advs.78448},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces
AU - Chi Zhang
AU - Jianing Yang
AU - Lingyun Zhang
AU - Jingyu Bao
AU - Bingbai Li
AU - Qingsong Feng
AU - Rui You
AU - Xiaoli Jing
AU - Fei Xing
AU - Xiaoguang Zhao
AU - Zheng You
PY - 2026
DA - 2026/10/27
JO - Advanced Science
DO - 10.1002/advs.78448
UR - https://doi.org/10.1002/advs.78448
AB - Active three‐dimensional sensing requires accurate light delivery and sufficient return‐signal strength, while complex scenes require a tunable balance between local power concentration and illumination coverage. Collimated beam illumination supports a longer maximum detectable distance by concentrating optical power, whereas expanded beam illumination improves angular sampling efficiency by increasing coverage per projection. Existing active‐illumination approaches typically use fixed illumination patterns or predefined scanning trajectories, making it difficult to balance local power concentration for maximum detectable distance with illumination coverage for sampling efficiency. Here we propose an adaptive active‐illumination method based on translationally and axially tunable cascaded metasurfaces (TATCMs). TATCMs control the beam output angle within the field of view (FoV) through lateral translation and tune illumination coverage through axial‐spacing tuning. At an operating wavelength of 905 nm, the implemented TATCMs demonstrate continuous beam‐output‐angle control across an approximately 70°×70° FoV under a ±300 µm lateral stroke, while increasing the interlayer spacing by 2.64 mm expands collimated beam illumination with a measured divergence of 0.06° to provide continuous coverage across the FoV. Adaptive three‐dimensional reconstruction further demonstrates the potential of TATCMs as a compact planar illumination platform for scene‐adaptive three‐dimensional sensing in autonomous vehicles, unmanned aerial vehicles, and industrial robotics.
SN - 2198-3844
ER -