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Related Experiment Video

Updated: Feb 3, 2026

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

An optical reaction micro-turbine.

Silvio Bianchi¹, Gaszton Vizsnyiczai^2,3, Stefano Ferretti²

¹NANOTEC-CNR, Institute of Nanotechnology, Soft and Living Matter Laboratory, Roma, I-00185, Italy.

Nature Communications

|October 28, 2018

Summary

Researchers developed 3D micro-turbines using direct laser writing to precisely control light momentum. These optical reaction micro-turbines efficiently convert light power into strong, uniform torque for micron-scale applications.

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Area of Science:

Photonics and Microfluidics
Optical Engineering
Nanotechnology

Background:

Energy flow is associated with momentum transfer, causing recoil forces upon energy absorption or deflection.
Microscopic turbines using light as a working fluid are limited by inefficient optical energy redistribution at the micron scale.

Purpose of the Study:

To fabricate 3D light-guiding structures for precise optical energy redirection.
To enhance the efficiency of power-to-torque conversion in micro-scale optical turbines.

Main Methods:

Direct laser writing was employed to fabricate 3D light-guiding structures.
Theoretical analysis of optical losses in curved microfibers informed the design of structure shape parameters.

Main Results:

Fabricated structures effectively reroute input optical power into multiple output channels.
The designed micro-turbines demonstrate efficient exploitation of light momentum.

Conclusions:

3D optical reaction micro-turbines can generate strong, uniform, and controllable torque.
This technology offers a pathway to overcome limitations in micro-scale optical energy conversion.