title: Utilization of photon orbital angular momentum in the low-frequency radio domain.
abstract: We show numerically that vector antenna arrays can generate radio beams that exhibit spin and orbital angular momentum characteristics similar to those of helical Laguerre-Gauss laser beams in paraxial optics. For low frequencies (< or = 1 GHz), digital techniques can be used to coherently measure the instantaneous, local field vectors and to manipulate them in software. This enables new types of experiments that go beyond what is possible in optics. It allows information-rich radio astronomy and paves the way for novel wireless communication concepts.
authors.affiliation: Swedish Institute of Space Physics, Angström Laboratory, SE-751 21, Uppsala, Sweden.
authors.forename: B
authors.initials: B
authors.lastname: Thidé
authors.forename: H
authors.initials: H
authors.lastname: Then
authors.forename: J
authors.initials: J
authors.lastname: Sjöholm
authors.forename: K
authors.initials: K
authors.lastname: Palmer
authors.forename: J
authors.initials: J
authors.lastname: Bergman
authors.forename: T D
authors.initials: TD
authors.lastname: Carozzi
authors.forename: Ya N
authors.initials: YN
authors.lastname: Istomin
authors.forename: N H
authors.initials: NH
authors.lastname: Ibragimov
authors.forename: R
authors.initials: R
authors.lastname: Khamitova
mesh_terms: D008027:Light; D009038:Motion; D055095:Optics and Photonics; D017785:Photons