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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

Tomographic active optical trapping of arbitrarily shaped objects by exploiting 3D refractive index maps.

Kyoohyun Kim^1,2, YongKeun Park^1,2,3

¹Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.

Nature Communications

|May 23, 2017

Summary

This study introduces a novel optical trapping method for precise 3D control of arbitrarily shaped particles. It enables real-time manipulation of non-spherical objects without prior geometric knowledge.

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Published on: January 15, 2013

Area of Science:

Photonics
Soft Matter Physics
Biophysics

Background:

Optical trapping commonly manipulates spherical particles via predicted optical forces.
Controlling non-spherical particles in three dimensions (3D) with arbitrary orientations presents significant experimental and computational challenges.

Purpose of the Study:

To develop a method for real-time optical control of arbitrarily shaped particles.
To overcome the limitations of current optical trapping techniques for complex geometries.

Main Methods:

Combines wavefront shaping of a trapping beam with 3D refractive index distribution measurements.
Engineers the 3D light field distribution to create a 'light mould' for particle manipulation.

Main Results:

Achieved stable, real-time optical control of arbitrarily shaped particles.
Demonstrated manipulation of colloidal and biological samples with complex orientations and shapes.
Eliminated the need for a priori information on sample geometry.

Conclusions:

The developed light mould technique offers precise 3D manipulation of non-spherical particles.
This method has direct applications in biophotonics and soft matter physics research.
Enables new possibilities for assembling and controlling microscale objects.