Abstract

The Thomson backscattering spectra in combined uniform magnetic and cosine-enveloped circularly polarized laser fields are studied in detail. With the introduction of envelope modulation, the radiation spectra exhibit high complexity attributed to the strong nonlinear interactions. On the other hand, four fundamental laws related to the scale invariance of the radiation spectra are analytically revealed and numerically validated. They are the laws for the radiation energy as the sixth power of the motion constant exactly, as the approximate negative sixth power with respect to the initial axial momentum and laser intensity in certain conditions, respectively, and finally, an important self-similar law, i.e., when the laser frequency is circular and the envelope modulation frequency and the modified cyclotron frequency are simultaneously increased by a factor, the radiation energy will be increased by the second power of that factor without changing the shape of the spectrum. With the application of these laws, especially the last one, a much higher radiation energy can be obtained and the harmonic at which the maximum radiation occurs can be precisely tuned without changing its amplitude. These findings provide a possible way to advance radiation technology in many fields such as medicine, communications, astrophysics, and security.

© 2019 Optical Society of America

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Retraction

This article has been retracted. Please see:
Julia Zhu and Bai-Song Xie, "Thomson backscattering in combined uniform magnetic and envelope modulating circularly polarized laser fields: retraction," J. Opt. Soc. Am. B 36, 2876-2876 (2019)
http://proxy.osapublishing.org/josab/abstract.cfm?uri=josab-36-10-2876

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