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Ultra-long-range optical pulling with an optical nanofibre.

Jianbin Zhang¹, Keying Liu¹, Pan Wang^1,2,3

¹New Cornerstone Science Laboratory, State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.

Nature Communications

|August 11, 2025

Summary

This summary is machine-generated.

Researchers achieved ultra-long-range optical pulling of micro-droplets using an optical nanofiber. This breakthrough extends the pulling distance significantly, enabling new applications in photonics and optofluidics.

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Area of Science:

Optics and Photonics
Nanotechnology

Background:

Optical pulling uses light momentum transfer for manipulation.
Current methods are limited to short ranges (hundreds of micrometres).

Purpose of the Study:

To demonstrate ultra-long-range optical pulling of micro-droplets.
To overcome the limitations of single-beam optical pulling.

Main Methods:

Utilized an optical nanofiber with a silica core.
Employed Minkowski-photon-momentum engineering with 1552-nm light.
Guided light along a nanofiber with a diameter below ~1/3 of the vacuum wavelength.

Main Results:

Achieved optical pulling of micro-droplets over distances up to 40 cm.
Successfully pulled a micro-droplet vertically against gravity (~1 nN).

Conclusions:

Optical nanofiber enables ultra-long-range optical pulling.
Opens new possibilities for nanophotonics, optomechanics, biophotonics, and optofluidics.