Enhanced high-order harmonic generation via controlling ionization in spatially extended systems

Journal Article · Fri May 15 00:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.79.053406· OSTI ID:21304705

Qingbin, Zhang; Weiyi, Hong; Qing, Liao; Pengfei, Lan; Xinbing, Wang ^[1]; Peixiang, Lu ^[1]

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1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074 (China)

We theoretically investigate the high-order harmonic generation when the spatially extended systems are irradiated by a two-color laser field. By controlling electron ionization, the {omega}+2{omega} excitation scheme creates efficient harmonics radiation beyond I{sub p}+3.17U{sub p} with both odd and even harmonics. Calculations show that the harmonics beyond I{sub p}+3.17U{sub p} are well phase locked, moreover, the chirp rate is only 3 as/eV. Using a 5 fs driving pulse, the bandwidth supporting isolated attosecond pulse in harmonic spectrum is 125 eV, and a 68 as single pulse can be obtained straightforwardly.

• OSTI ID: 21304705
• Journal Information: Physical Review. A, Vol. 79, Issue 5; Other Information: DOI: 10.1103/PhysRevA.79.053406; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COLOR
ELECTRONS
EV RANGE
EXCITATION
HARMONIC GENERATION
HARMONICS
IONIZATION
LASER RADIATION
MODULATION
PHOTON-MOLECULE COLLISIONS
PULSES
SPECTRA