Optical micromanipulation using supercontinuum Laguerre-Gaussian and Gaussian beams

Area of Science:

• Optical physics
• Photonics
• Nanotechnology

Background:

• Optical tweezers are crucial for manipulating microscopic particles.
• Supercontinuum light sources offer unique properties for advanced optical trapping.
• Holographic techniques enable complex light field generation for enhanced control.

Purpose of the Study:

• To characterize a single-beam supercontinuum optical trap and determine its stiffness.
• To develop and evaluate a holographic dual-beam supercontinuum trap.
• To demonstrate optical trapping and controlled rotation of particles using supercontinuum vortex beams.

Main Methods:

• Utilized a spatial light modulator to create a holographic supercontinuum trap.
• Measured transverse trapping stiffness of the single-beam trap.
• Generated and characterized a dual-beam supercontinuum trap.
• Employed supercontinuum vortex beams for particle trapping and rotation.

Main Results:

• Successfully characterized the stiffness of a single-beam supercontinuum trap.
• Demonstrated the performance of a holographic dual-beam supercontinuum trapping system.
• Achieved optical trapping and rotation of spheres using supercontinuum vortex beams.
• Quantified the transfer of orbital angular momentum to trapped particles, inducing rotation.

Conclusions:

• Holographic supercontinuum light offers versatile capabilities for optical trapping.
• The developed system allows for precise control over particle manipulation and rotation.
• Supercontinuum vortex beams effectively transfer orbital angular momentum for controlled particle spinning.