Flexible trajectory control of Bessel beams with pure phase modulation

Area of Science:

• Optics and Photonics
• Laser Physics

Background:

• Spatial phase modulation is key for designing novel self-accelerating light beams.
• Bessel beams offer a foundation for creating complex beam dynamics.

Purpose of the Study:

• To propose and demonstrate a pure phase modulation method for converting zero-order Bessel beams into predesigned self-accelerating beams.
• To enable flexible control over the propagation trajectories of light beams.

Main Methods:

• Utilizing transverse-longitudinal mapping of Bessel beams.
• Applying pure phase modulation to a zero-order Bessel beam.
• Experimental realization of modulated Bessel beam propagation.

Main Results:

• Successfully converted a zero-order Bessel beam into a self-accelerating beam.
• Experimentally demonstrated parabolic, spiral, and teleporting self-accelerating beam trajectories.
• Achieved good agreement between experimental results and designed trajectories.

Conclusions:

• The proposed pure phase modulation method is effective for generating predesigned self-accelerating beams.
• This technique offers operational simplicity and fewer restrictions on trajectory design.
• Enables the creation of versatile light beam paths for various applications.