Ultra-long-range optical pulling with an optical nanofibre
Abstract As a counterintuitive phenomenon, optical pulling of an object has been attracting increasing attention in recent years, owing to its intriguing underlying physics of light momentum transfer and potential for multi-directional manipulation. Due to the difficulty in engineering wave vectors...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-08-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-62536-w |
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| Summary: | Abstract As a counterintuitive phenomenon, optical pulling of an object has been attracting increasing attention in recent years, owing to its intriguing underlying physics of light momentum transfer and potential for multi-directional manipulation. Due to the difficulty in engineering wave vectors for long-range optical pulling with a single beam, to date, the pulling range of an object is experimentally limited to hundreds of micrometres. Here, we demonstrate ultra-long-range optical pulling of a micro-droplet with an optical nanofibre based on the Minkowski-photon-momentum engineering. We show that, when a 1552-nm-wavelength light is launched into and guided along a silica nanofibre with a diameter below ~1/3 of the vacuum wavelength, it can pull back a micro-droplet (tens of micrometres in diameter) over a distance up to 40 cm. Also, we have succeeded in vertically pulling up a micro-droplet against its own gravity (~1 nN). These results pave the way for ultra-long-range optical pulling, with promising applications in nanophotonics, optomechanics, biophotonics and optofluidics. |
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| ISSN: | 2041-1723 |