Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 36: Optomechanics II
Q 36.4: Talk
Wednesday, March 16, 2022, 14:45–15:00, Q-H13
Light mediated coupling of levitated nanoparticles — •Jakob Rieser1, Mario Ciampini1, Henning Rudolph2, Klaus Hornberger2, Benjamin Stickler2, Nikolai Kiesel1, Markus Aspelmeyer1, and Uros Delic1 — 1University of Vienna, Vienna, Austria — 2University of Duisburg-Essen, Duisburg/Essen, Germany
Optical binding, the self organization of multiple particles in optical traps, has been studied using dielectric microparticles as well as liquid suspended metallic nanoparticles, usually trapped in a single optical potential. These particles are either comparable in size to the wavelength or plasmonic and cannot be approximated as dipoles.
In this talk, I will introduce an experiment studying light mediated interactions in the dipole regime. By using two independent optical traps to levitate two Rayleigh nanoparticles, we can study true dipole-dipole coupling effects. These arise due to interference between coherently scattered light and the trapping beams. By tuning the relative phase, amplitude, and position of the trapping light fields we can explore the interaction for a wide range of parameters, showing that we achieve strong coupling between two nanoscale dielectric objects.
Finally, we show that we can turn off the dipole-dipole interaction, which allows us to study different coupling mechanisms, such as Coulomb coupling.