Optical centrifuge for nanoparticles
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866916800750419968 |
|---|---|
| author | Xiong, Peiyao Ho, Kit Ka Kelvin Gosling, J. M. H. Rademacher, M. Barker, P. F. |
| author_facet | Xiong, Peiyao Ho, Kit Ka Kelvin Gosling, J. M. H. Rademacher, M. Barker, P. F. |
| contents | We study the creation of an optical centrifuge for the controlled rotation of levitated nanorotors within an optical tweezer. The optical centrifuge is created by rapidly rotating the linear polarization of the tightly focused optical field used to form an optical trap. We show that nanorotors, formed by anisotropic nanoparticles levitated within the trap, can be accelerated to well-defined rotational rates in excess of 100 MHz over durations of hundreds of microseconds. The initial conditions required for stable acceleration, based on optical trap properties and the anisotropic susceptibility of the nanorotor are established, and confirmed by numerical simulations. We also present initial experiments that have developed tools for the rapid angular acceleration of the polarization vector of the linearly polarized beam that is required to create the centrifuge. We show that over the acceleration durations in the 100 $\upmu$s range, high rotational speeds could be achieved in modest vacuum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_16134 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optical centrifuge for nanoparticles Xiong, Peiyao Ho, Kit Ka Kelvin Gosling, J. M. H. Rademacher, M. Barker, P. F. Optics Quantum Physics We study the creation of an optical centrifuge for the controlled rotation of levitated nanorotors within an optical tweezer. The optical centrifuge is created by rapidly rotating the linear polarization of the tightly focused optical field used to form an optical trap. We show that nanorotors, formed by anisotropic nanoparticles levitated within the trap, can be accelerated to well-defined rotational rates in excess of 100 MHz over durations of hundreds of microseconds. The initial conditions required for stable acceleration, based on optical trap properties and the anisotropic susceptibility of the nanorotor are established, and confirmed by numerical simulations. We also present initial experiments that have developed tools for the rapid angular acceleration of the polarization vector of the linearly polarized beam that is required to create the centrifuge. We show that over the acceleration durations in the 100 $\upmu$s range, high rotational speeds could be achieved in modest vacuum. |
| title | Optical centrifuge for nanoparticles |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2506.16134 |