Experimental demonstration of 3D accelerating beam arrays

Area of Science:

• Optical Physics
• Beam Array Generation

Background:

• Accelerating beams exhibit unique nondiffracting and self-healing propagation dynamics.
• These properties stem from specific phase factors in their spatial frequency spectrum, like the cubic phase for Airy beams.

Purpose of the Study:

• To theoretically and experimentally demonstrate novel accelerating beam arrays.
• To explore the generation of different types of beam arrays, such as Airy beam arrays.

Main Methods:

• Superimposing kinoforms of multifocal patterns onto the spatial frequency spectrum of accelerating beams.
• Generating and measuring beam arrays by scanning a reflection mirror along the optical axis.
• Reconstructing 3D intensity patterns from experimental data.

Main Results:

• Successfully generated and measured Airy beam arrays and two-main-lobe accelerating beam arrays.
• Experimental 3D intensity patterns showed good agreement with theoretical predictions.
• Demonstrated the feasibility of combining accelerating beams with optical beam arrays.

Conclusions:

• The proposed method enables the creation of versatile accelerating beam arrays.
• These arrays hold promise for applications in optical microscopy, micromachining, and optical trapping.