Quasi-random square gabor spiral zone plates for high-order diffraction suppression and multi-functional optical...

Area of Science:

• Optics and Photonics
• Material Science

Background:

• Spiral zone plates are crucial for generating optical vortices, essential for physics research and matter detection.
• Existing spiral zone plates face limitations in integrating functionalities like high-order diffraction suppression and complex vortex generation.

Purpose of the Study:

• To propose a novel planar optical element, the quasi-random square Gabor spiral zone plates (QSGSZPs), overcoming the limitations of traditional spiral zone plates.
• To demonstrate the QSGSZPs' capability for efficient single-order diffraction and flexible generation of complex optical vortex structures.

Main Methods:

• Converting a 3D Gabor spiral zone plate structure into a 2D structure with approximate sinusoidal transmittance.
• Theoretical analysis and experimental validation of the QSGSZPs' performance.
• Investigating focusing properties and demonstrating applications in edge-enhanced imaging and optical communications.

Main Results:

• QSGSZPs effectively achieve single-order diffraction, suppressing unwanted higher orders.
• Demonstrated the ability to generate complex vortex structures, such as flower-shaped optical vortex lattices and vortex twins, by modulating topological charge.
• Investigated the focusing properties of QSGSZPs with varying parameters.

Conclusions:

• The proposed QSGSZPs offer a single-element solution for advanced optical vortex generation and manipulation.
• This technology shows significant potential for applications in edge-enhanced imaging, optical communications, and other fields requiring precise control of light.
• QSGSZPs represent a significant advancement in planar optical element design for versatile optical applications.