Negative Forces for a Dimer of Identical Nanoparticles

Machine Learning Methods in Systems: Proceedings of 13th Computer Science On-line Conference (CSOC 2024). Vol.4. Lecture Notes in Networks and Systems. Vol.1126 2024
Sergey Sukhov, Denis Kislov, Vjačeslavs Bobrovs

In this work, the optical forces acting on a dimer composed of nanoparticles are considered. The calculation of optical forces (Lorentz forces) is carried out on the basis of electromagnetic fields obtained as a result of solving a self-consistent system of field equations. An analytical formula is derived showing the dependence of the optical force acting on the dimer on the parameters of the dimer system and a structured wave composed of two crossing plane waves. It is shown for the first time that a dimer of identical dipole particles in a structured optical field can be subject to a pulling force towards the source, the so-called “negative radiation pressure” . The corresponding scattering diagram of the dimer system shows enhanced forward scattering, which confirms the indicated mechanism for the generation of attractive forces. The results of the study will be useful for expanding the possibilities of optical manipulation of nano- and micro-particles.

Keywords
nanoparticle; nanophotonics; optical forces; tractor beam
DOI
10.1007/978-3-031-70595-3_35
Hyperlink
https://link.springer.com/chapter/10.1007/978-3-031-70595-3_35

Sukhov, S., Kislov, D., Bobrovs, V. Negative Forces for a Dimer of Identical Nanoparticles. In: Machine Learning Methods in Systems: Proceedings of 13th Computer Science On-line Conference (CSOC 2024). Vol.4. Lecture Notes in Networks and Systems. Vol.1126, Germany, Berlin, 24-24 April, 2024. Cham: Springer Science and Business Media Deutschland GmbH, 2024, pp.344-351. ISBN 978-3-031-70594-6. e-ISBN 978-3-031-70595-3. ISSN 2367-3370. e-ISSN 2367-3389. Available from: doi:10.1007/978-3-031-70595-3_35

Publication language
English (en)