Intensity-symmetric accelerating caustic beams

Area of Science:

• Optics and Photonics
• Laser Physics
• Beam Shaping

Background:

• Optical beams with accelerating trajectories are crucial for particle manipulation.
• Existing accelerating beams like Airy beams have limitations in particle clearing efficiency.

Purpose of the Study:

• To construct and generate novel symmetric accelerating caustic beams (ACBs).
• To investigate the optical morphology and particle force properties of these ACBs.
• To explore potential applications of ACBs in science and technology.

Main Methods:

• Utilizing 3/2-order phase-only masks with elliptical contours.
• Applying principles of optical caustics and diffraction theory.
• Numerical simulations and theoretical analysis of beam propagation and particle interaction.

Main Results:

• Successfully generated symmetric ACBs with a bimodal intensity profile.
• Observed two quasi-constant intensity peaks, resembling face-to-face Airy-like beams.
• Characterized the fundamental optical morphology and particle-manipulating forces of ACBs.

Conclusions:

• Symmetric ACBs offer unique optical properties distinct from conventional accelerating beams.
• ACBs demonstrate potential for efficient particle clearing, acting as a 'laser water pump'.
• These beams could advance applications in electron acceleration and microparticle manipulation.