Maqola

Time-dependent optimization of laser-produced molecular plasmas through high-order harmonic generation

Ganjaboy S. BoltaevDepartment of Physics, American University of Sharjah 2 , PO Box 26666, Sharjah, United Arab EmiratesR. A. GaneevDepartment of Physics, American University of Sharjah 2 , PO Box 26666, Sharjah, United Arab EmiratesVyacheslav V. KimDepartment of Physics, American University of Sharjah 2 , PO Box 26666, Sharjah, United Arab EmiratesKe ZhangThe 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, ChinaMottamchetty 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, ChinaChunlei 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

Annotatsiya

Analysis and characterization of laser-produced plasmas (LPPs) require the advanced methods for determination of different multiparticle component formation and spreading. Time-resolved high-order harmonic generation (HHG) in spreading LPPs allows determining optimal conditions for this process. One of the most important parameters of HHG in LPP is the delay between the heating and driving pulses. We demonstrate that the optimization of delays allows achieving the maximal harmonic yields in LPP created on the surfaces of the solid targets possessing different molar masses (m). The optimal delays (t) for B4C, ZnO, GaP, GaAs, and Ag2S plasmas were determined to be approximately 200, 300, 350, 500, and 700 ns, respectively. These variations of delays correspond to the t∞(m)0.5 dependence for different materials. We demonstrate the applicability of the proposed method for analysis of the resonance-enhanced harmonics in atomic and molecular plasmas (Mo and MoS2) and for studies of large perovskite aggregates as potential emitters of harmonics. This diagnostic technique can also be applied to the analysis of the presence of different nanostructures in LPPs through HHG with a high spatiotemporal resolution.

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Identifikatorlar

DOI: 10.1063/1.5123244

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