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5 October 2023 Depth sensing with metasurface and PCSEL integration
Wen-Cheng Hsu, Chia-Hsun Chang, Yu-Heng Hong, Hao-Chung Kuo, Yao-Wei Huang
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Proceedings Volume 12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; 1264806 (2023) https://doi.org/10.1117/12.2676118
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
We present a novel depth sensing system applying metasurface holograms and photonic crystal surface-emitting lasers (PCSELs). Our lens-free, single-shot system projects 9,500 infrared dots in a 0th order of holographic image from a compact ~3002 μm2 sample area, offering a wide 56.7° field-of-view (FOV) with low power consumption. Our metasurface area is 55 times smaller than that of diffractive optical elements (DOEs) in commercial dot projectors. And our PCSEL has up to 10 times less power consumption than that of vertical-cavity surface-emitting laser (VCSEL) array in commercial dot projectors. The GaAs-based metasurface hologram and simple optical architecture make it lighter and more energy-efficient, suitable for wearable devices. This technology overcomes limitations of bulky dot projectors, paving the way for integration into compact wearable devices.
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(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Wen-Cheng Hsu, Chia-Hsun Chang, Yu-Heng Hong, Hao-Chung Kuo, and Yao-Wei Huang "Depth sensing with metasurface and PCSEL integration", Proc. SPIE 12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, 1264806 (5 October 2023); https://doi.org/10.1117/12.2676118
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KEYWORDS
Holograms
Projection systems
Near infrared
Sensing systems
Structured light
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