Multi-focus composite spiral zone plate to generate focused vortices with the comparable intensity based on genetic...

Area of Science:

• Optics and Photonics
• Computational Physics
• Materials Science

Background:

• Generating multiple optical vortices with controlled intensity is crucial for advanced applications.
• Traditional methods for designing complex optical elements can be inefficient and labor-intensive.
• Optimizing optical element parameters often requires sophisticated algorithms.

Purpose of the Study:

• To introduce a novel optical element, the Multi-focus Composite Spiral Zone Plate (MFCSZP).
• To generate multiple focused optical vortices with approximately equal intensity along the optical axis.
• To demonstrate the efficacy of intelligent algorithms in optimizing optical element design.

Main Methods:

• Design and optimization of the MFCSZP using a genetic algorithm (GA).
• Theoretical analysis of the focusing properties of the MFCSZP.
• Experimental verification of the MFCSZP's performance.

Main Results:

• The optimized MFCSZP successfully generated multiple focused vortices.
• The generated vortices exhibited comparable peak intensities along the optical axis.
• Experimental results validated the theoretical predictions.

Conclusions:

• The study successfully demonstrated the MFCSZP's capability to produce multi-focused vortices with uniform intensity.
• The use of a genetic algorithm significantly improved the efficiency and accuracy of optical element design.
• The MFCSZP shows promise for applications in optical trapping and laser machining.