Generation of vector Bessel beams with diffractive phase elements based on the Jacobi-Anger expansion

Area of Science:

• Optics and Photonics
• Quantum Optics
• Beam Shaping

Background:

• Bessel beams are non-diffracting beams with unique propagation characteristics.
• Generating multiple Bessel beams and vector Bessel beams simultaneously presents a significant challenge in optics.

Purpose of the Study:

• To design and optimize a diffractive phase element for generating multiple scalar and vector Bessel beams.
• To explore the application of the Jacobi-Anger relation in optical beam generation.

Main Methods:

• Design of a diffractive phase element based on the Jacobi-Anger relation.
• Utilizing a liquid-crystal spatial light modulator for optical implementation.
• Experimental demonstration of simultaneous multi-scalar Bessel beam generation.
• Construction of vector Bessel beams via superposition of scalar modes.

Main Results:

• Simultaneous generation of multiple scalar Bessel beams with different integer orders.
• Successful generation of vector Bessel beams of orders m=0 and m=1.
• Demonstration of arbitrary order vector Bessel beam generation through mode superposition.

Conclusions:

• The developed diffractive phase element enables efficient generation of complex light fields.
• This method provides a versatile platform for creating tailored optical beams for various applications.
• The use of a spatial light modulator offers a flexible and reconfigurable approach to beam generation.