Optical binding in complex landscapes

Michael J. O'Donnell; Thomas S. Morling; Simon Hanna

doi:10.1117/12.2651121

15 March 2023 Optical binding in complex landscapes

Michael J. O'Donnell, Thomas S. Morling, Simon Hanna

Proceedings Volume 12436, Complex Light and Optical Forces XVII; 124360J (2023) https://doi.org/10.1117/12.2651121
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Optical binding occurs when light scattered from a microscopic particle induces forces on other microscopic particles, which includes attractive, binding, forces. Since the original demonstration using dielectric spheres, there has been much interest in altering the shape and symmetry of the bound particles, leading to complex optically driven behaviour typically involving uniform illumination in a restricted region e.g. an extended or line focus or the axis of a Bessel beam. However, in the present computational study we consider confinement in complex optical landscapes comprising one or many focussed beams. In this survey we will explore the behaviours of systems of spherical beads with various refractive indices, as well as systems of dimers, or dumbbells, consisting of pairs of linked spheres and active janus particles comprising pairs of beads with different refractive indices. The relative importance of optical trapping versus optical trapping between the particles will be assessed.

Conference Presentation

Citation Download Citation

Michael J. O'Donnell, Thomas S. Morling, and Simon Hanna "Optical binding in complex landscapes", Proc. SPIE 12436, Complex Light and Optical Forces XVII, 124360J (15 March 2023); https://doi.org/10.1117/12.2651121

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