Programme

P.20 -- Poster, ANSWCCMS-2023

Date: Tuesday, 7 November 2023

Time: 13:00 - 14:30

Non-equilibrium dynamics of Janus particle in a harmonic optical trap

Mike Bonachita, Romie Seth Florida, and Mark Nolan Confesor

Department of Physics and Complex Systems Research Center - PRISM, Mindanao State University - Iligan Institute of Technology, Iligan City 9200 Philippines

Self-propelled particles are crucial components for single drug delivery systems, lab-on-chip devices, and modeling non-equilibrium systems, among others. For instance, a metal-coated Janus particle under light illumination can self-propel via self-thermophoresis. Regardless, there is still limited understanding of how the metallic Janus particle responds to a harmonic optical trap. Here, we show experiments on the optical trapping of metal-coated Janus particles in an optical point trap. We observed a supernova-like explosion on the trajectories of the Janus particle at increasing laser power. We conjecture that such behavior is due to the competition between heating and trapping effects.

Presenter: Mike Arig Bonachita