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Chirality in electromagnetic radiation from relativistic electrons
Masahiro Katoh1,2, Masaki Fujimoto3, Elham Salehi2
1Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-hiroshima, Japan.
Abstract:
Electrons in circular motion emit electromagnetic radiation and lose their energy and angular momentum, both of which are carried away by the radiation field. Electromagnetic radiation from such electrons is not only circularly polarized but also, in general, possessing helical phase structure, the former of which corresponds to spin angular momentum and the latter orbital angular momentum. Based on the classical electrodynamics, we show that the chiral topological property related to the orbital angular momentum arises from deformation of the electromagnetic field due to the relativistic effect.
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