Application of Quasi-Phase Matching Concept for Enhancement of High-Order Harmonics of Ultrashort Laser Pulses in Plasmas

Applied Sciences

S.Y. Stremoukhov¹  A.V. Andreev¹  R.A. Ganeev²  A.S. Alnaser² 

[1] Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia;Materials Science and Engineering Research Institute, American University of Sharjah, Sharjah P.O. Box 26666, UAE;

关键词: high harmonics generation;    laser plasma;    quasi-phase matching;    non-perturbative theory;   

DOI  :  10.3390/app9081701

来源: DOAJ

【 摘 要 】

Novel methods of coherent short-wavelength sources generation require thorough analysis for their further amendments and practical implementations. In this work, we report on the quasi-phase matching (QPM) of high-order harmonics generation during the propagation of single- and two-color femtosecond pulses through multi-jet plasmas, which allows the enhancement of groups of harmonics in different ranges of extreme ultraviolet. The role of the number of coherent zones; sizes of plasma jets and the distance between them; plasma formation conditions, and the characteristics of the fundamental radiation on the harmonic efficiency at quasi-phase matching (QPM) conditions are analyzed. We demonstrate the ~40× enhancement factor of the maximally-enhanced harmonic with respect to the one generated at ordinary conditions in the imperforated plasma.

【 授权许可】

Unknown