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Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities

Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities

Published on: April 22, 2013

Optical trapping using cascade conical refraction of light.

D P O'Dwyer¹, K E Ballantine, C F Phelan

¹School of Physics, Trinity College Dublin, Dublin 2, Ireland.

|October 6, 2012

Summary

Scientists demonstrated cascade conical refraction using biaxial crystals to create versatile optical traps. This technique allows for precise manipulation and rotation of multiple trapped microspheres, with potential applications in optical trapping setups.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Cascade conical refraction involves light passing through multiple biaxial crystals.
The output beam's properties depend on crystal orientation and light polarization.

Purpose of the Study:

To investigate cascade conical refraction for creating novel optical traps.
To demonstrate the manipulation of multiple microspheres using controlled light beams.

Main Methods:

Utilizing two or more serially arranged biaxial crystals to induce cascade conical refraction.
Controlling the output beam profile by adjusting the relative azimuthal orientation of the crystals.
Employing linearly polarized light and a half-wave plate to manipulate trapped microspheres.

Main Results:

Achieved trapping of one microsphere in the central spot and another on a ring beam.
Demonstrated controlled rotation of a ring-trapped microsphere relative to a central sphere.
Created a unique dual-peak ring beam profile for trapping and rotating two microspheres simultaneously.

Conclusions:

Cascade conical refraction offers a versatile method for creating complex optical traps.
The demonstrated technique enables precise multi-particle manipulation and rotation.
This versatile optical trap has significant potential for advanced optical trapping applications.