Optical orbital angular momentum transfer to electronic currents
Résumé
Light orbital angular momentum (OAM) is transformed into an electronic current loop in a copper coil, by absorption of the optical radiation. The measurement of this current, that is in the 10−17 A range, makes it possible to evaluate and quantify the OAM carried by an electromagnetic wave in the optical domain. In particular, it determines unambiguously the torque generated by the beam and its topological charge. The induced current depends on the optical power and on the wavelength, in good agreement with theoretical predictions. Further possible developments towards an optical torque-meter are then discussed.
Mots clés
Physics
Orbital angular momentum of light
Angular momentum
Angular momentum of light
Orbital angular momentum multiplexing
Azimuthal quantum number
Total angular momentum quantum number
Angular momentum coupling
Orbital motion
Momentum transfer
Optics
Quantum electrodynamics
Computational physics
Classical mechanics
Scattering
orbital angular momentum of light
torque
angular momentum transfer
Domaines
Physique [physics]
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