ArticleNature communications2024
Super-resolution acoustic displacement metrology through topological pairs in orbital meta-atoms.
Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Dual-function acoustic-to-optical transducers for underwater encrypted communication and subwavelength distance measurement.Science advances · 2026Article
- Tunable Sound Absorption via Evanescent-Wave Coupling in Asymmetric Bilayer Metasurfaces.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- Acoustic Pancharatnam-Berry geometric phase for structured sound manipulation.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Deep learning and superoscillatory speckles empowered multimode fiber probe for in situ nano-displacement detection and micro-imaging.Nature communications · 2026Article
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The precise measurement of minute displacements using light is a common practice in modern science and technology. The utilization of sound for precision displacement metrology remains scarce due to the diffraction limit of half-wavelength, while it holds crucial applications in some specific scenarios, such as underwater environments, biological tissues, and complex machinery components. Here, we propose an approach to super-resolution acoustic displacement metrology by introducing the concept of topological pairs in orbital meta-atoms, drawing inspiration from the analogy of Cooper pairs observed in spinful electrons. The topological pairs are conjugately formed to create two distinct pathways in mode space that enable robust generation of interference. This allows the realization of acoustic analogue of Malus's law and thereby enhances the resolution of displacement measurements. By incorporating a spiral twist configuration in orbital meta-atoms, we demonstrate the first acoustic prototype of a physical micrometer tailored for micron-scale displacement metrology. We observe experimentally a displacement resolving power of 1.2 μm at an audible frequency of 3.43 kHz, approximately 1/10
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