Usually, photons are described by plane waves with a definite 4-momentum. In addition to plane-wave photons, "twisted photons" have recently entered the field of modern laser optics; these are coherent superpositions of plane waves with a defined projection ℏm of the orbital angular momentum onto the propagation axis, where m is an integer. In this Letter, we show that it is possible to produce high-energy twisted photons by Compton backscattering of twisted laser photons off ultrarelativistic electrons. Such photons may be of interest for experiments related to the excitation and disintegration of atoms and nuclei, and for studying the photoeffect and pair production off nuclei in previously unexplored experimental regimes.
U. D. Jentschura and V. G. Serbo, "Generation of High-Energy Photons with Large Orbital Angular Momentum by Compton Backscattering," Physical Review Letters, vol. 106, no. 1, pp. 013001-1-013001-4, American Physical Society (APS), Jan 2011.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevLett.106.013001
Keywords and Phrases
Coherent Superpositions; Compton Backscattering; High Energy; High Energy Photons; Laser Photons; Orbital Angular Momentum; Pair Production; Photoeffect; Plane Wave; Propagation Axis; Angular Momentum; Backscattering; Elastic Waves; High Energy Physics; Light
International Standard Serial Number (ISSN)
Article - Journal
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