Modification of the spectrum of high harmonics by a weak vacuum ultraviolet field
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DOI: 10.1070/qel16651
Abstract: Within the framework of the time-dependent effective range theory, we have calculated the spectra of high harmonics in a field containing an intense low-frequency component and a weak (perturbative) high-frequency component with a photon energy… read more here.
Keywords: spectrum high; field; modification spectrum; harmonics weak ... See more keywords
Efficient XUV-light out-coupling of intra-cavity high harmonics by a coated grazing-incidence plate.
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DOI: 10.1364/oe.458946
Abstract: We experimentally demonstrate an efficient and broadband extreme-ultraviolet light (XUV) out-coupling mechanism of intra-cavity generated high harmonics. The mechanism is based on a coated grazing-incidence plate (GIP), which utilizes the enhanced reflectivity of s-polarized light… read more here.
Keywords: incidence; high harmonics; coated grazing; harmonics ... See more keywords
Role of fractional high harmonics with non-integer OAM on the generation of a helical attosecond pulse train.
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DOI: 10.1364/oe.479226
Abstract: Extreme-ultraviolet pulses of attosecond duration carrying orbital angular momentum (OAM) can be produced by spectrally filtering vortex high harmonics generated in a gas medium. Here we reveal that fractional high harmonics (FHHs) with non-integer OAM… read more here.
Keywords: fractional high; helical attosecond; non integer; high harmonics ... See more keywords
High Harmonics with Controllable Polarization by a Burst of Linearly-Polarized Driver Pulses
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DOI: 10.3390/photonics4020031
Abstract: We theoretically explore a scheme for generation of bright circularly and elliptically polarized high-order harmonics by bursts of linearly polarized pulses with a rotating polarization axis. Circularly polarized harmonics are formed if the bursts are… read more here.
Keywords: harmonics controllable; linearly polarized; controllable polarization; high harmonics ... See more keywords