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Generation of isolated sub-10-attosecond pulses in spatially inhomogenous two-color fields

Xu CaoDepartment of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China)Shicheng JiangDepartment of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China)Chao YuDepartment of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China)Yunhui WangDepartment of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China)Lihua BaiDepartment of Physics, Shanghai University , Shanghai 200444, ChinaRuifeng LuDepartment of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China)

2014en

ABI

Annotatsiya

We present a theoretical investigation of high-order harmonic generation in spatially inhomogeneous two-color laser fields by solving three dimensional time dependent Schrödinger equation. The cutoff in the harmonic spectra can be significantly extended by means of our proposed method (i.e., from helium interacting with the plasmon-enhanced two-color laser fields), and an ultrabroad supercontinuum up to 1.5 keV is generated by selecting proper carrier-envelope phase of the controlling field. Moreover, classical trajectory extraction, time-dependent ionization and recombination rates, and time-frequency analyses are used to explain the generation of this ultrabroadband supercontinuum. As a result, an isolated 8.8 attosecond pulse can be generated directly by the superposition of the supercontinuum harmonics.

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Identifikatorlar

DOI: 10.1364/oe.22.026153

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