期刊
NATURE COMMUNICATIONS
卷 13, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-28700-2
关键词
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资金
- Italian Ministry of Education, University, and Research through the PRIN Project INPhoPOL
- European Union Horizon 2020 program, within European Research Council [694683]
- European Research Council (ERC) [694683] Funding Source: European Research Council (ERC)
The authors introduce a new optical encoding technique called linear photonic gears, which enables ultra-sensitive measurements of transverse displacements by mapping them into the polarization rotation of a laser beam. They argue that a resolution of 50 pm should be achievable with existing state-of-the-art technologies.
Accurately measuring mechanical displacements is essential for a vast portion of current technologies. Several optical techniques accomplish this task, allowing for non-contact sensing even below the diffraction limit. Here we introduce an optical encoding technique, dubbed linear photonic gears, that enables ultra-sensitive measurements of a transverse displacement by mapping it into the polarization rotation of a laser beam. In ordinary ambient conditions, we measure the relative shift between two objects with a resolution of 400 pm. We argue that a resolution of 50 pm should be achievable with existing state-of-the-art technologies. Our single-optical-path scheme is intrinsically stable and it could be implemented as a compact sensor, using cost effective integrated optics. We anticipate it may have a strong impact on both research and industry. The authors introduce linear gears to measure mechanical displacements with high sensitivity. Such gears covert tiny transverse shifts between two birefringent devices into a giant polarization rotation of a laser beam.
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