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Updated: Jun 14, 2026

Direct Force Measurements of Subcellular Mechanics in Confinement using Optical Tweezers

Direct Force Measurements of Subcellular Mechanics in Confinement using Optical Tweezers

Published on: August 31, 2021

Optical micromanipulations in the non-diffractive regime.

Smitha S Varghese¹, Min Gu

¹Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology,Hawthorn, VIC 3122, Australia.

Journal of Biophotonics

|March 20, 2010

Summary

Near-field optical manipulation uses evanescent waves to move particles beyond the diffraction limit. Researchers observed erythrocyte (red blood cell) pearl chains using this advanced optical tweezer technique.

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Area of Science:

Optics and Photonics
Biophysics
Nanotechnology

Background:

Optical micromanipulation has advanced significantly over 30 years, with new applications emerging.
Near-field optical manipulation, utilizing evanescent waves, operates beyond the diffraction limit.
Breaking the diffraction limit is a key driver for near-field optics research.

Purpose of the Study:

To review near-field optical manipulation techniques.
To report the observation of erythrocyte pearl chains using near-field optical tweezers.

Main Methods:

Review of existing near-field optical manipulation literature.
Experimental application of a near-field optical tweezer.

Main Results:

Observation of erythrocyte (red blood cell) pearl chains.
Demonstration of particle manipulation in the non-diffractive regime.

Conclusions:

Near-field optical manipulation offers advanced capabilities for particle handling.
The technique enables the formation of ordered structures like erythrocyte pearl chains.