Towards a comprehensive characterization of spatio-temporal dependence of light-induced electromagnetic forces in dielectric liquids.

Autor: Astrath NGC; Department of Physics, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil. ngcastrath@uem.br., Bergmann EV; Department of Physics, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil., Anghinoni B; Department of Physics, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil., Flizikowski GAS; School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, K1N6N5, Canada., Novatski A; Department of Physics, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, 84030-900, Brazil., Jacinto C; Institute of Physics, Universidade Federal de Alagoas, Maceió, AL, 57072-900, Brazil., Požar T; Faculty of Mechanical Engineering, University of Ljubljana, 1000, Ljubljana, Slovenia., Kalin M; Faculty of Mechanical Engineering, University of Ljubljana, 1000, Ljubljana, Slovenia., Malacarne LC; Department of Physics, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil., Baesso ML; Department of Physics, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Mar 07; Vol. 14 (1), pp. 5595. Date of Electronic Publication: 2024 Mar 07.
DOI: 10.1038/s41598-024-56176-1
Abstrakt: The interaction of localized light with matter generates optical electrostriction within dielectric fluids, leading to a discernible change in the refractive index of the medium according to the excitation's light profile. This optical force holds critical significance in optical manipulation and plays a fundamental role in numerous photonic applications. In this study, we demonstrate the applicability of the pump-probe, photo-induced lensing (PIL) method to investigate optical electrostriction in various dielectric liquids. Notably, the thermal and nonlinear effects are observed to be temporally decoupled from the electrostriction effects, facilitating isolated observation of the latter. Our findings provide a comprehensive explanation of optical forces in the context of the recently introduced microscopic Ampère electromagnetic formalism, which is grounded in the dipolar approximation of electromagnetic sources within matter and characterizes electrostriction as an electromagnetic-induced stress within the medium. Here, the optical force density is re-obtained through a new Lagrangian approach.
(© 2024. The Author(s).)
Databáze: MEDLINE
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