Generation of an isolated few-attosecond pulse in optimized inhomogeneous two-color fields

Yi Chou, Peng Cheng Li, Tak San Ho, Shih I. Chu

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We present a numerical study for optimization of ultrabroad supercontinuum spectrum by controlling the waveforms of laser fields, with the ultimate goal to generate isolated ultrashort attosecond pulses. Specifically, we extend a derivative-free nonconvex optimization algorithm for maximization of the supercontinnum power spectrum near the high-order harmonic generation (HHG) cutoff. It is found that optimally shaped inhomogeneous two-color mid-infrared laser fields can greatly enhance and extend the high-order harmonic generation plateau. Wavelet time-frequency analysis and classical simulations show that the superposition of resulting hydrogen HHG supercontinuum effectively gives rise to a robust isolated 5-as pulse.

Original languageEnglish (US)
Article number023423
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number2
StatePublished - Aug 28 2015

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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