Multipole Engineering of Optical Forces

Data Analytics in System Engineering: Proceedings of 7th Computational Methods in Systems and Software (CoMeSySo 2023). Lecture Notes in Networks and Systems. Vol.910 2024
Denis Kislov, Vjačeslavs Bobrovs

In most cases, the smallest particles are subjected to forces of attraction and repulsion due to the gradient and radiation pressure. The use of additional degrees of freedom in optomechanical manipulations opens up new possibilities. In this work, we investigate the optical forces acting on a high refractive index silicon sphere in a focused Gaussian beam. Analysis of multipolarity allows us to separate the optical force into trapping and scattering components, which have different physical nature and result in different mechanical effects. These effects are associated with multipolar interference and asymmetric far-field scattering patterns. Such an approach is useful for understanding optomechanical motion and its regularities in the far-field zone. Multipolar engineering of optical forces, not limited to spherical shapes, opens up new possibilities in microfluidic applications, including sorting and assembly of complex volumetric geometries.

Keywords
gaussian beam; multipole expansion; optical antitrapping; optical bending; optical forces; optical trapping
DOI
10.1007/978-3-031-53552-9_33
Hyperlink
https://link.springer.com/chapter/10.1007/978-3-031-53552-9_33

Kislov, D., Bobrovs, V. Multipole Engineering of Optical Forces. In: Data Analytics in System Engineering: Proceedings of 7th Computational Methods in Systems and Software (CoMeSySo 2023). Lecture Notes in Networks and Systems. Vol.910, Germany, Berlin, 12-13 April, 2024. Cham: Springer Science and Business Media Deutschland GmbH, 2024, pp.373-379. ISBN 978-303153551-2. ISSN 2367-3370. Available from: doi:10.1007/978-3-031-53552-9_33

Publication language
English (en)