Vacuum levitation of nanoparticles

0568276 - ÚPT 2023 PL eng A - Abstract
Svak, Vojtěch - Flajšmanová, Jana - Šiler, Martin - Brzobohatý, Oto - Simpson, Stephen Hugh - Jákl, Petr - Jonáš, Alexandr - Ježek, Jan - Zemánek, Pavel
Vacuum levitation of nanoparticles.
Book of Abstracts. 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, September 5-9, 2022, Wojanów, Poland. Wrocław: Wroclaw University of Science and Technology, 2022 - (Sztylińska, K.). s. 55
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /22./. 05.09.2022-09.09.2022, Wojanow]
Institutional support: RVO:68081731
Keywords : levitated optomechanics * optical binding * coupled nanomechanical oscillators * dual-beam optical trap * spatial light modulator * Bayesian inference
OECD category: Optics (including laser optics and quantum optics)
https://psc2022.pwr.edu.pl/docs/pscoc2022_book_of_abstracts.pdf

Micro- and nano-particles levitated in optical fields act as nanoscale oscillators. When operated in vacuum, they become excellent low dissipation optomechanical
objects, with minimal thermal contact to the environment. Levitated optomechanics is considered the most promising platform for studying high-mass quantum physics, including macroscopic entanglement of two massive objects. Also, optically trapped nanoparticles represent the testbed for nanoscale stochastic processes. No matter what the application is, the experimenters face the problems of preparation, characterization and control of mechanical system. We present experimental realization of microscale system of two coupled oscillators, which is made up of two optically levitated and optically bound micro-particles. We reach air pressure for which the normal-mode splitting start to occur and show, that an active control of the system needs to be employed in order to prevent particle collision while decreasing the pressure even more. We introduce a Bayesian inference based framework, which uses the measured stochastic trajectories of the micro-particles to estimate the optical forces acting on them. Although this framework was inspired by the need for characterization of optical binding forces, it is usable for estimation of optical forces from stochastic trajectories in general situations.
Permanent Link: https://hdl.handle.net/11104/0339604