Abstract
Practical aspects of the robust method we proposed for producing few-cycle attosecond pulses with arbitrary waveform in the extreme ultraviolet spectral range are studied numerically. It is based on the undulator radiation of relativistic ultrathin electron layers produced by laser-driven energy modulation. By using realistic specifications, we show that isolated waveform-controlled extreme ultraviolet attosecond pulses at 20 nm with 90 nJ energy and 80 as pulse duration, and at 60 nm with 200 nJ energy and 240 as duration can be generated, respectively.
Highlights
In recent years a few phenomena sensitive to the carrier-envelope-phase (CEP) of ultrashort laser pulses were recognized [1, 2]
Waveform-controlled few-cycle laser pulses enabled the generation of isolated attosecond pulses in the extreme ultraviolet (EUV) spectral range and their application to the study of electron dynamics in atoms, molecules, and solids [3]
Described schemes suggest the possibility of sub-attosecond pulse generation in the hard-X-ray region [17], and single-cycle free-electron lasers (FELs) pulse generation in the THz [18] and in the X-ray region [19]
Summary
In recent years a few phenomena sensitive to the carrier-envelope-phase (CEP) of ultrashort laser pulses were recognized [1, 2]. EUV pump—EUV probe experiments can be carried out at free-electron lasers (FELs) [7, 8]; the temporal resolution is limited to the few fs regime. Various schemes, such as the longitudinal space charge amplifier [9], emittance spoiler foil technique [10, 11], wave selection technique [12], or enhanced self-amplified spontaneous emission (E-SASE) [13, 14], were proposed for attosecond pulse generation at FELs. High current modulation technique were suggested to generate isolated attosecond pulses in X-ray region [15, 16]. Described schemes suggest the possibility of sub-attosecond pulse generation in the hard-X-ray region [17], and single-cycle FEL pulse generation in the THz [18] and in the X-ray region [19]
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