Статья

High-order harmonic generation using quasi-phase matching and two-color pump in the plasmas containing molecular and alloyed metal sulfide quantum dots

R. A. GaneevDepartment of Physics, American University of Sharjah 3 , PO Box 26666, Sharjah, UAEGanjaboy S. BoltaevDepartment of Physics, American University of Sharjah 3 , PO Box 26666, Sharjah, UAEVyacheslav V. KimDepartment of Physics, American University of Sharjah 3 , PO Box 26666, Sharjah, UAEMottamchetty VenkateshThe Guo China-US Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences 1 , Changchun 130033, ChinaA. I. ZvyaginFaculty of Physics, Voronezh State University 2 , 1 University Square, Voronezh 394018, RussiaM. S. SmirnovFaculty of Physics, Voronezh State University 2 , 1 University Square, Voronezh 394018, RussiaO. V. OvchinnikovFaculty of Physics, Voronezh State University 2 , 1 University Square, Voronezh 394018, RussiaMichael WöstmannCenter for Soft Nanoscience, University of Münster 5 , 48149 Münster, GermanyH. ZachariasCenter for Soft Nanoscience, University of Münster 5 , 48149 Münster, GermanyChunlei GuoThe Guo China-US Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences 1 , Changchun 130033, China

2019en

ABI

Аннотация

As high-order harmonic emitters, quantum dots are produced through laser-induced plasmas. Subsequently, we generate high-order harmonics with 800-nm and 30-fs pulses from laser-produced plasmas containing quantum dots of different metal sulfides (Ag2S, CdS, and Cd0.5Zn0.5S). The high-order harmonic generation is analyzed using different approaches, including two-color (800 nm + 400 nm) pump, application of alloyed quantum dots, and quasiphase matching of interacting waves. We discuss the self-phase modulation induced splitting of harmonics, the difference in the application of thick and thin crystals for second harmonic (400 nm) emission during two-color pumping of the quantum dot plasma, the spatial modulation of the quantum dot plasma for quasiphase matching, and the comparison of harmonic yields from monomer and quantum dot plasmas. This study allows us to determine the mechanisms of coherent extreme ultraviolet radiation generation using a few nanometer-sized emitters as well as optimal methods for further enhancing the high-order harmonic generation efficiency.

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Идентификаторы

DOI: 10.1063/1.5124139

Цитирования и источники

Цитирований: 16Использованных источников: 0

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