Transfer of orbital angular momentum on a macroscopic object in the UHF frequency band

Ronan Niemiec (1) , Christian Brousseau (1) , Olivier Emile (2) , Kouroch Mahdjoubi (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 URU 435 LPL - URU 435 Laboratoire de physique des lasers

We report on the exchange of orbital angular momentum between an electromagnetic microwave and a macroscopic object. Using a quadrupole wire antenna at frequency f = 870 MHz, we induce a torque on a suspended copper strip. The induced torque on the strip is of the order of 10 8 Nm. A linear dependence of the acceleration of the strip on the radiated power, up to 8.10-4 °/s², is observed and rotations of a few degrees are measured.

Domaines: Electromagnétisme; Electronique; Physique Classique [physics.class-ph]

Ronan Niemiec, Christian Brousseau, Olivier Emile, Kouroch Mahdjoubi. Transfer of orbital angular momentum on a macroscopic object in the UHF frequency band. AES2012 - Advanced Electromagnetics Symposium, Apr 2012, Paris, France. pp.1. ⟨hal-00776494⟩