Continuous cubic phase microplates for generating high-quality Airy beams with strong deflection.

Area of Science:

• Optics and Photonics
• Micro-optics Engineering

Background:

• Airy beams exhibit unique properties like nondiffraction, self-healing, and transverse acceleration, making them valuable for various applications.
• Fabricating micro-scale cubic phase plates with continuous phase variation for high-quality Airy beam generation remains a significant challenge.

Purpose of the Study:

• To design and fabricate a continuous cubic phase microplate (CCPP) for generating high-quality Airy beams at the micrometer scale.
• To overcome the limitations in current fabrication methods for micro-optic elements used in Airy beam generation.

Main Methods:

• Femtosecond laser direct writing was employed to fabricate a continuous cubic phase microplate (CCPP) with precise dimensions (60 μm × 60 μm × 1.1 μm).
• The optical efficiency of the fabricated CCPP was measured to be approximately 79%.

Main Results:

• A high-quality Airy beam was successfully generated using the fabricated CCPP.
• The generated Airy beam demonstrated a strong deflection of approximately 4.2 μm over a 90 μm propagation distance.
• The Airy beam exhibited diffraction-free propagation characteristics.

Conclusions:

• The developed CCPP offers a viable solution for generating high-quality Airy beams in micrometer scales.
• This research advances the development of miniature Airy phase plates, paving the way for integrated optics, optical micromanipulation, and advanced optical imaging techniques.