Invited Review Article: Technology for Attosecond Science

Frank, F.; Arrell, Christopher; Witting, Tobias; Okell, William; McKenna, J. A.; Robinson, Joseph S.; Haworth, C. A.; Austin, Dane R.; Teng, Hao; Walmsley, Ian A.; Marangos, J. P.; Tisch, J. W. G.

doi:10.1063/1.4731658

Cited by 88 publications

(68 citation statements)

References 134 publications

(156 reference statements)

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“…26 While this technique yields attosecond pulses at high photon energies, its photon flux is inherently low. Recently, Frank et al 27 described a beamline, suitable for single attosecond pulse generation, based on the same spectral filtering technique. All these setups are equipped with a single interaction region in which pumpprobe measurements can be performed.…”

Section: Introductionmentioning

confidence: 99%

Versatile attosecond beamline in a two-foci configuration for simultaneous time-resolved measurements

Locher

Lucchini

Herrmann

et al. 2014

Review of Scientific Instruments

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We present our attoline which is a versatile attosecond beamline at the Ultrafast Laser Physics Group at ETH Zurich for attosecond spectroscopy in a variety of targets. High-harmonic generation (HHG) in noble gases with an infrared (IR) driving field is employed to generate pulses in the extreme ultraviolet (XUV) spectral regime for XUV-IR cross-correlation measurements. The IR pulse driving the HHG and the pulse involved in the measurements are used in a non-collinear set-up that gives independent access to the different beams. Single attosecond pulses are generated with the polarization gating technique and temporally characterized with attosecond streaking. This attoline contains two target chambers that can be operated simultaneously. A toroidal mirror relay-images the focus from the first chamber into the second one. In the first interaction region a dedicated double-target allows for a simple change between photoelectron/photoion measurements with a time-of-flight spectrometer and transient absorption experiments. Any end station can occupy the second interaction chamber. A surface analysis chamber containing a hemispherical electron analyzer was employed to demonstrate successful operation. Simultaneous RABBITT measurements in two argon jets were recorded for this purpose.

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Section: Introductionmentioning

confidence: 99%

Versatile attosecond beamline in a two-foci configuration for simultaneous time-resolved measurements

Locher

Lucchini

Herrmann

et al. 2014

Review of Scientific Instruments

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“…Recent examples for achieving this include the use of high harmonic generation [7], time-resolved photoelectron spectroscopy [8] and strong field ionisation [9], to name but a few highlights from the last two years. Rather recently, the control of the carrier envelope phase and the production of pulse durations in the attosecond regime (see for example [10]) have even opened routes towards imaging the internal electron dynamics in molecules in a weak field regime [5].…”

Section: Introductionmentioning

confidence: 99%

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

Oppermann

2014

Springer Theses

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In this thesis, the role of the molecular structure in strong field induced processes in CO 2 is resolved by the use of optimised impulsive molecular alignment. Two processes were investigated: recollision induced ionisation and the dissociation of the molecular ion CO + 2 . Both processes are driven by the initial tunneling ionisation of CO 2 . Through the use of molecular alignment, the orbital symmetries of the involved molecular ionic states were resolved, revealing the internal molecular dynamics in the form of ionisation and excitation pathways.A novel data analysis procedure was developed to extract the alignment distribution and rotational temperature of the impulsively aligned molecular ensemble. This facilitated the optimisation of molecular alignment in mixed gas samples and was demonstrated for N 2 , O 2 and CO 2 seeded in Ar.The recollision induced or nonsequential double ionisation (NSDI) of CO 2 was then studied in the molecular frame. The process was fully characterised by measuring the shape of the recolliding electron wavepacket and the angularly resolved inelastic electronion recollision cross section. The results reveal the contribution from both the ionic ground and first excited state of CO + 2 to the NSDI mechanism. This study was extended to the strong field induced dissociation of impulsively aligned CO + 2 . It was found that dissociation is driven by a parallel dipole transition from the second excited ionic state B to the predissociating state C, whilst recollision excitation was shown to not play a role. The strong field induced coupling of the ionic states B and C could thus be controlled by the laser polarisation.The results obtained in this thesis further the understanding of population dynamics of cation states in strong field processes. This is of special interest for extending molecular strong field physics to the study of electronic degrees of freedom and their coupling to the nuclear motion. had hoped for in a research degree and I cannot thank Jon enough for making it such an enriching experience, both professionally and personally.

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“…Pioneering time resolved studies using EUV carries an intensity dependent phase, making phase matching much more demanding [24][25][26]. Popular schemes to make use of some phase matching include gas jets [27][28][29], gas cells [16,[30][31][32][33][34] multiple gas cells in series [35] hollow core capillaries [36] and plasma plumes [37].…”

Section: Introductionmentioning

confidence: 99%

A Beamline for Time-Resolved Extreme Ultraviolet and Soft X-Ray Spectroscopy

Koch¹

2014

J Anal Bioanal Tech

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High harmonic generation is a convenient way to obtain extreme ultraviolet light from table-top laser systems and the experimental tools to exploit this simple and powerful light source for time-resolved spectroscopy are being developed by several groups. For these applications, brightness and stability of the high harmonic generation is a key feature. This article focuses on practical aspects in the generation of extreme ultraviolet pulses with ultrafast commercial lasers, namely generation parameters and online monitoring as well as analysis of generation yield and stability.

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Invited Review Article: Technology for Attosecond Science

Cited by 88 publications

References 134 publications

Versatile attosecond beamline in a two-foci configuration for simultaneous time-resolved measurements

Versatile attosecond beamline in a two-foci configuration for simultaneous time-resolved measurements

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

A Beamline for Time-Resolved Extreme Ultraviolet and Soft X-Ray Spectroscopy

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