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Multi-degree-of-freedom radially self-accelerating beams via angular-spectrum engineering
Optics Letters
|March 13, 2026
Summary
Researchers developed a new method to control multi-degree-of-freedom radially self-accelerating beams (RSABs). This allows for programmable control over their rotation, intensity, trajectory, and orbital angular momentum (OAM) for advanced optical applications.
Area of Science:
- Optics and Photonics
- Beam Propagation Dynamics
- Light-Matter Interactions
Background:
- Radially self-accelerating beams (RSABs) possess unique rotating propagation and orbital angular momentum (OAM) properties.
- Applications include optical micromanipulation and metrology.
- Conventional RSABs have fixed propagation, limiting their use in complex scenarios.
Purpose of the Study:
- To propose and demonstrate a flexible framework for designing and controlling multi-degree-of-freedom RSABs (Multi-DoF RSABs).
- To enable programmable control over key beam characteristics.
Main Methods:
- Angular-spectrum engineering approach based on Fourier optics.
- Design and experimental validation of Multi-DoF RSABs.
Main Results:
- Demonstrated independent adjustment of four degrees of freedom: angular velocity, longitudinal intensity, 3D trajectory, and OAM.
- Experimental results align with theoretical predictions.
Conclusions:
- The proposed method provides a flexible framework for designing advanced RSABs.
- Highlights potential for applications in optical manipulation and microfabrication.
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