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

Astrath, Nelson Guilherme Castelli (author), Bergmann, E. V. (author), Anghinoni, Bruno (author), Flizikowski, Gabriel Antonio Siqueira (author), Novatski, A. (author), Jacinto, C. (author), Požar, Tomaž (author), Kalin, Mitjan (author), Malacarne, Luis Carlos (author), Baesso, Mauro L. (author)

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.

• Language: English
• Keywords: electrostriction, radiation forces, photo-induced lensing effect, pressure-transients, Kerr lens
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 13 str.
• Numbering: Vol. 14, art. 5595
• PID: 20.500.12556/RUL-155067
• UDC: 535
• ISSN on article: 2045-2322
• DOI: 10.1038/s41598-024-56176-1
• COBISS.SI-ID: 189407747
• Publication date in RUL: 19.03.2024

Record is a part of a journal

• Title: Scientific reports
• Shortened title: Sci. rep.
• Publisher: Nature Publishing Group
• ISSN: 2045-2322
• COBISS.SI-ID: 18727432

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: elektrostrikcija, sevalna sila, učinek fotoinduciranega lečenja, prehodni tlak, Kerrova leča