Lateral optical binding between two colloidal particles

Ming Tzo Wei, Tsz Fai Jack NG, C. T. Chan, H. Daniel Ou-Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

An optical binding force between two nearby colloidal particles trapped by two coherent laser beams is measured by phase-sensitive detection. The binding force is long-range and spatially oscillatory. For identical linearly-polarized incident beams, the oscillation period is equal to the optical wavelength. For mutually perpendicular polarizations, a new force appears with half-wavelength periodicity, caused by double inter-particle scattering. This force is observable only with cross-polarized incident beams, for which the stronger single-scattering forces are forbidden by parity.

Original languageEnglish
Article number38883
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 16 Dec 2016

Scopus Subject Areas

  • General

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