Proposal for attosecond light pulse generation using laser induced multiple-harmonic conversion processes in rare gases

Farkas, Gy.; Tóth, Cs.

doi:10.1016/0375-9601(92)90534-s

Cited by 286 publications

(132 citation statements)

References 12 publications

Supporting

Mentioning

125

Contrasting

Unclassified

Order By: Relevance

“…Coherent attosecond light bursts produced during highharmonic emission of atoms irradiated by intense femtosecond lasers bear the promise of being able to probe inner-shell electronic motion in atoms with unprecedented resolution [1]. The discrete nature and broad envelope spectrum of high-harmonic emission implies that appropriate phase locking of different harmonics can result in a train of pulses of attosecond duration [2]. Such early predictions are now strongly supported by recent experimental evidence indicating that harmonic emission from a macroscopic medium of atoms effectively consists of a train of attosecond pulses separated by one-half of the fundamental laser period [3,4].…”

mentioning

confidence: 99%

Time-resolved ellipticity gating of high-order harmonic emission

López-Martens¹,

Mauritsson²,

Johnsson³

et al. 2004

Phys. Rev. A

View full text Add to dashboard Cite

mentioning

confidence: 99%

Time-resolved ellipticity gating of high-order harmonic emission

López-Martens¹,

Mauritsson²,

Johnsson³

et al. 2004

Phys. Rev. A

View full text Add to dashboard Cite

“…The T 0 /2 periodicity of this process (T 0 being the laser optical period) ensures that only odd harmonics of the fundamental radiation are emitted. Temporally, the XUV pulses are emitted as a train of chirped attosecond pulses [8][9][10] (1 attosecond = 10 −18 s). For both plateau (low energy) and cut-off (high energy) harmonics, specific focusing conditions ensure that only a single attosecond pulse is emitted every half cycle 11,12 .…”

mentioning

confidence: 99%

Controlling attosecond electron dynamics by phase-stabilized polarization gating

et al. 2006

View full text Add to dashboard Cite

A ttosecond electron wavepackets are produced when an intense laser field ionizes an atom or a molecule 1 . When the laser field drives the wavepackets back to the parent ion, they interfere with the bound wavefunction, producing coherent subfemtosecond extreme-ultraviolet light bursts. When only a single return is possible 2,3 , an isolated attosecond pulse is generated. Here we demonstrate that by modulating the polarization of a carrier-envelope phase-stabilized short laser pulse 4 , we can finely control the electron-wavepacket dynamics. We use high-order harmonic generation to probe these dynamics. Under optimized conditions, we observe the signature of a single return of the electron wavepacket over a large range of energies. This temporally confines the extreme-ultraviolet emission to an isolated attosecond pulse with a broad and tunable bandwidth. Our approach is very general, and extends the bandwidth of attosecond isolated pulses in such a way that pulses of a few attoseconds seem achievable. Similar temporal resolution could also be achieved by directly using the broadband electron wavepacket. This opens up a new regime for timeresolved tomography of atomic or molecular wavefunctions 5,6 and ultrafast dynamics.During high-order harmonic generation (HHG) in gas 7 , short electron wavepackets (EWPs) are periodically released by high-field ionization. Their subsequent coherent interaction with the remaining bound wavefunction leads to coherent extremeultraviolet (XUV) emission. The T 0 /2 periodicity of this process (T 0 being the laser optical period) ensures that only odd harmonics of the fundamental radiation are emitted. Temporally, the XUV pulses are emitted as a train of chirped attosecond pulses [8][9][10] (1 attosecond = 10 −18 s). For both plateau (low energy) and cut-off (high energy) harmonics, specific focusing conditions ensure that only a single attosecond pulse is emitted every half cycle 11,12 . Extracting an isolated attosecond pulse from this train requires breaking the periodicity of the process, so that XUV emission is only possible within a single half cycle of the fundamental pulse. In this way, isolated 250-attosecond-long Figure 1 Spectra generated in argon. Spectra emitted from an argon medium irradiated with a polarization-modulated pulse (τ = 5 fs, δ = 6.2 fs, β = 0 • ) as a function of the CEP shift. For some CEPs, harmonic peaks appear, whereas for other CEPs, they broaden up to a continuum.pulses were recently obtained 13 by selecting the (highly intensity dependent) cut-off harmonics generated in neon by a 5-fs linearly polarized, fundamental pulse with stabilized carrierenvelope phase (CEP). With this technique, the minimum pulse duration achievable is limited by the (∼10 eV) bandwidth of the selected cut-off harmonics, which prevents us reaching the sub-100-attosecond domain.To isolate a broadband attosecond pulse, we used a different approach 2 . Our approach relies on the strong HHG sensitivity on the ellipticity, ε, of the fundamental field, which is largely nature phy...

show abstract

“…One of the most powerful spectroscopic tools provided by HHG is the generation XUV pulses of sub-femtosecond duration [8,9,37,38]. An attosecond pulse train (1 as = 10 −18 s) is obtained by the selection of the higher frequency part of the harmonic spectrum that conform the plateau region [39].…”

Section: Xuv Attosecond Helical Pulsesmentioning

confidence: 99%

Generation and Applications of Extreme-Ultraviolet Vortices

et al. 2017

View full text Add to dashboard Cite

Vortex light beams are structures of the electromagnetic field with a spiral phase ramp around a point-phase singularity. These vortices have many applications in the optical regime, ranging from optical trapping and quantum information to spectroscopy and microscopy. The extension of vortices into the extreme-ultraviolet (XUV)/X-ray regime constitutes a significant step forward to bring those applications to the nanometer or even atomic scale. The recent development of a new generation of X-ray sources, and the refinement of other techniques, such as harmonic generation, have boosted the interest of producing vortex beams at short wavelengths. In this manuscript, we review the recent studies in the subject, and we collect the major prospects of this emerging field. We also focus on the unique and promising applications of ultrashort XUV/X-ray vortex pulses.

show abstract

Proposal for attosecond light pulse generation using laser induced multiple-harmonic conversion processes in rare gases

Cited by 286 publications

References 12 publications

Time-resolved ellipticity gating of high-order harmonic emission

Time-resolved ellipticity gating of high-order harmonic emission

Controlling attosecond electron dynamics by phase-stabilized polarization gating

Generation and Applications of Extreme-Ultraviolet Vortices

Contact Info

Product

Resources

About