Experimental realization of the devil's vortex Fresnel lens with a programmable spatial light modulator.

Area of Science:

• Optics and Photonics
• Light Manipulation
• Vortex Beam Generation

Background:

• Generating multiple optical vortices is crucial for applications in optical trapping, imaging, and information processing.
• Existing methods often require complex setups or lack flexibility in controlling vortex properties.

Purpose of the Study:

• To develop a unique and compact experimental method for generating multiple optical vortices.
• To investigate the multifocal and orbital angular momentum properties of a combined devil's vortex and Fresnel lens system.
• To validate the experimental results with numerical simulations based on Huygens-Fresnel wavelet theory.

Main Methods:

• Utilized a spatial light modulator to create a hybrid lens combining a devil's vortex lens and a Fresnel lens.
• The hybrid lens integrated fractal zone plate multifocal properties with spiral phase plate orbital angular momentum.
• Performed experimental generation of multiple vortices and conducted numerical simulations.

Main Results:

• Successfully generated multiple optical vortices using the proposed hybrid lens system.
• Demonstrated the multifocal nature and controllable orbital angular momentum of the generated beams.
• Experimental results showed strong agreement with numerical simulations, confirming the method's robustness.

Conclusions:

• The developed devil's vortex and Fresnel lens system provides an effective and compact method for generating multiple optical vortices.
• The study validates the predictive accuracy of Huygens-Fresnel wavelet theory for complex optical phenomena.
• This technique offers a flexible platform for advanced optical applications requiring tailored vortex beams.