Twin equal-intensity foci with the same resolution generated by a modified precious mean zone plate

Area of Science:

• Optics and Photonics
• Diffractive Optics

Background:

• Zone plates are diffractive optical elements used for focusing light.
• Achieving multiple, high-quality foci from a single element is a significant challenge in optics.

Purpose of the Study:

• To propose and validate a modified precious mean zone plate (MPMZP) capable of generating twin equal-intensity foci.
• To investigate the resolution, energy efficiency, and vortex generation properties of the MPMZP.
• To demonstrate the self-reconstruction capability of MPMZP beams.

Main Methods:

• Design and construction of the modified precious mean zone plate (MPMZP).
• Numerical simulations to analyze beam propagation and focus characteristics.
• Experimental verification of the generated foci and vortices.

Main Results:

• The MPMZP successfully generates twin equal-intensity foci with comparable resolution.
• The energy efficiencies of the twin foci are approximately equal.
• MPMZP with helical phase generates twin vortices of the same diameter.
• MPMZP beams exhibit self-reconstruction properties, confirmed through simulations and experiments.

Conclusions:

• The proposed MPMZP is an effective tool for creating dual, high-resolution focal spots.
• The MPMZP offers versatile applications in areas such as optical lithography, particle manipulation, and imaging.
• The ability to generate identical foci and vortices in two planes opens new possibilities for advanced optical systems.