Trapping and guiding microparticles with morphing autofocusing Airy beams

Area of Science:

• Optics and Photonics
• Microparticle Manipulation
• Beam Physics

Background:

• Optical trapping commonly uses focused laser beams.
• Airy beams offer unique self-healing and non-diffracting properties.
• Controlling particle movement with complex beam structures is an active research area.

Purpose of the Study:

• To investigate optical trapping and manipulation of dielectric microparticles.
• To utilize the transverse acceleration of autofocusing radially symmetric Airy beams.
• To explore the transformation of Airy beams into Bessel beams and their application in particle transport.

Main Methods:

• Employing autofocusing radially symmetric Airy beams for optical trapping.
• Exploiting the inward or outward transverse acceleration of chirped wavefronts.
• Experimentally demonstrating the far-field transformation of Airy beams into nondiffracting Bessel beams.

Main Results:

• Successful optical trapping and manipulation of dielectric microparticles were achieved.
• The transformation of Airy beams into Bessel beams in the far-field was experimentally confirmed.
• The guiding and transport of microparticles along the primary rings of these beams were demonstrated.

Conclusions:

• Autofocusing Airy beams are effective tools for microparticle manipulation.
• The unique properties of Airy beams, including their transformation into Bessel beams, enable novel particle guiding capabilities.
• This work opens new avenues for precise control and transport of microparticles in optical systems.