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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

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Phase quasi-random squares spiral zone plates with single-focus diffraction.

Huakui Hu, Weifeng Wu, Huajie Xu

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|August 12, 2025

Summary

This summary is machine-generated.

Researchers developed phase quasi-random squares spiral zone plates (PQRSZPs) to eliminate background noise in optical vortex generation. This innovation enhances signal clarity for physics studies and matter detection.

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Area of Science:

Optics and Photonics
Diffraction Physics

Background:

Optical vortices are crucial for physics research and matter detection due to orbital angular momentum.
Traditional spiral zone plates suffer from high-order diffraction, introducing noise and complicating analysis.

Purpose of the Study:

To design a novel single-focus spiral zone plate, termed phase quasi-random squares spiral zone plates (PQRSZPs).
To mitigate issues associated with high-order diffraction in optical vortex generation.

Main Methods:

The design transforms the 3D sinusoidal structure of traditional plates into an easily fabricable 3D square structure with a 2π phase difference.
Theoretical analysis and experimental validation were employed.

Main Results:

PQRSZPs effectively suppress unwanted high-order diffraction.
Increased diffraction intensity for the desired order was observed.
Demonstrated helical phase structures with multiple topological charges in output beams.

Conclusions:

PQRSZPs offer a significant improvement over traditional spiral zone plates for generating clean optical vortices.
The technology shows promise for applications in astrophysics and advanced imaging techniques.