https://doi.org/10.1051/epjap/2025013
Original Article
How to optimize the extraction of the spin angular momentum of an electromagnetic wave using resonances
1
LAPLACE, Université de Toulouse, CNRS, INPT, UPS, 31077 Toulouse, France
2
Anywaves, 2 Esplanade Compans Caffarelli, 31000 Toulouse, France
* e-mail: come.jodet@laplace.univ-tlse.fr
Received:
25
November
2024
Accepted:
18
April
2025
Published online: 28 May 2025
This paper is part of an ongoing study on the manipulation of objects using microwaves. The first step consists of rotating magnetic dipoles. The aim of this article is to approach this through a transfer of Angular Momentum (AM) from a microwave to an object and thereby studying the in influence of resonances in order to increase this transfer. Theoretical approaches supported by experimental work are provided. Previous results are revisited using an AM transfer approach. A simple analytical model is developed to study the role of a resonant cavity. This leads to the experimental spinning of a centimetric non-resonant copper ring in an electromagnetic resonant cavity, achieving several rotations within a few tens of seconds. The limitations and prospects of these results are discussed.
Key words: Electrodynamics / radiation pressure / polarization of light / microwave resonance / angular momentum of light
© C. Jodet et al., Published by EDP Sciences, 2025
This article is distributed under the terms of the Creative Commons Attribution License https://creativecommons.org/licenses/by/4.0 which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
