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• Journal article
  Cooper B, Kolorenc P, Frasinski LJ, Averbukh V, Marangos JPet al., 2014,

  Analysis of a measurement scheme for ultrafast hole dynamics by few femtosecond resolution X-ray pump-probe Auger spectroscopy

  , Faraday Discussions, Vol: 171, Pages: 93-111, ISSN: 1364-5498

  Ultrafast hole dynamics created in molecular systems as a result of sudden ionisation is the focus of much attention in the field of attosecond science. Using the molecule glycine we show through ab initio simulations that the dynamics of a hole, arising from ionisation in the inner valence region, evolves with a timescale appropriate to be measured using X-ray pulses from the current generation of SASE free electron lasers. The examined pump–probe scheme uses X-rays with photon energy below the K edge of carbon (275–280 eV) that will ionise from the inner valence region. A second probe X-ray at the same energy can excite an electron from the core to fill the vacancy in the inner-valence region. The dynamics of the inner valence hole can be tracked by measuring the Auger electrons produced by the subsequent refilling of the core hole as a function of pump–probe delay. We consider the feasibility of the experiment and include numerical simulation to support this analysis. We discuss the potential for all X-ray pump-X-ray probe Auger spectroscopy measurements for tracking hole migration.

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• Journal article
  Arrell CA, Ojeda J, Sabbar M, Okell WA, Witting T, Siegel T, Diveki Z, Hutchinson S, Gallmann L, Keller U, van Mourik F, Chapman RT, Cacho C, Rodrigues N, Turcu ICE, Tisch JWG, Springate E, Marangos JP, Chergui Met al., 2014,

  A simple electron time-of-flight spectrometer for ultrafast vacuum ultraviolet photoelectron spectroscopy of liquid solutions

  , Review of Scientific Instruments, Vol: 85, ISSN: 1089-7623

  We present a simple electron time of flight spectrometer for time resolved photoelectron spectroscopy of liquid samples using a vacuum ultraviolet (VUV) source produced by high-harmonic generation. The field free spectrometer coupled with the time-preserving monochromator for the VUV at the Artemis facility of the Rutherford Appleton Laboratory achieves an energy resolution of 0.65 eV at 40 eV with a sub 100 fs temporal resolution. A key feature of the design is a differentially pumped drift tube allowing a microliquid jet to be aligned and started at ambient atmosphere while preserving a pressure of 10−1 mbar at the micro channel plate detector. The pumping requirements for photoelectron (PE) spectroscopy in vacuum are presented, while the instrument performance is demonstrated with PE spectra of salt solutions in water. The capability of the instrument for time resolved measurements is demonstrated by observing the ultrafast (50 fs) vibrational excitation of water leading to temporary proton transfer.

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• Journal article
  Leeuwenburgh J, Cooper B, Averbukh V, Marangos JP, Ivanov Met al., 2014,

  Reconstruction of correlation-driven electron-hole dynamics by high-harmonic-generation spectroscopy

  , Physical Review A, Vol: 90, ISSN: 1094-1622
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• Conference paper
  Lopez-Quintas I, Oujja M, Sanz M, Benitez-Canete A, Hutchison C, de Nalda R, Martin M, Ganeev RA, Marangos JP, Castillejo Met al., 2014,

  Characterization of laser-induced plasmas of nucleobases: Uracil and thymine

  , 5th European-Materials-Research-Society Symposium on Laser Material Interactions for Micro- and Nano- Applications, Publisher: ELSEVIER, Pages: 299-302, ISSN: 0169-4332
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  • Citations: 6
• Journal article
  Haessler S, Balciunas T, Fan G, Andriukaitis G, Pugzlys A, Baltuska A, Witting T, Squibb R, Zair A, Tisch JWG, Marangos JP, Chipperfield LEet al., 2014,

  Optimization of quantum trajectories driven by strong-field waveforms

  , Physical Review X, Vol: 4, ISSN: 2160-3308

  Quasifree field-driven electron trajectories are a key element of strong-field dynamics. Upon recollision with the parent ion, the energy transferred from the field to the electron may be released as attosecond-duration extreme ultaviolet emission in the process of high-harmonic generation. The conventional sinusoidal driver fields set limitations on the maximum value of this energy transfer and the efficient return of the launched electron trajectories. It has been predicted that these limits can be significantly exceeded by an appropriately ramped-up cycle shape [L. E. Chipperfield et al., Phys. Rev. Lett. 102, 063003 (2009)]. Here, we present an experimental realization of similar cycle-shaped waveforms and demonstrate control of the high-harmonic generation process on the single-atom quantum level via attosecond steering of the electron trajectories. With our improved optical cycles, we boost the field ionization launching the electron trajectories, increase the subsequent field-to-electron energy transfer, and reduce the trajectory duration. We demonstrate, in realistic experimental conditions, 2 orders of magnitude enhancement of the generated extreme ultraviolet flux together with an increased spectral extension. This application, which is only one example of what can be achieved with cycle-shaped high-field light waves, has significant implications for attosecond spectroscopy and molecular self-probing.

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• Journal article
  Hutchison C, Houver S, Lin N, Hoffmann DJ, McGrath F, Siegel T, Austin DR, Zair A, Salieres P, Marangos JPet al., 2014,

  Electron trajectory control of odd and even order harmonics in high harmonic generation using an orthogonally polarised second harmonic field

  , JOURNAL OF MODERN OPTICS, Vol: 61, Pages: 608-614, ISSN: 0950-0340
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  • Citations: 7
• Journal article
  Hoffmann DJ, Hutchison C, Zair A, Marangos JPet al., 2014,

  Control of temporal mapping and harmonic intensity modulation using two-color orthogonally polarized fields

  , PHYSICAL REVIEW A, Vol: 89, ISSN: 1050-2947
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  • Citations: 12
• Journal article
  Ganeev RA, Abdelrahman Z, Frank F, Witting T, Okell WA, Fabris D, Hutchison C, Marangos JP, Tisch JWGet al., 2014,

  Spatial coherence measurements of non-resonant and resonant high harmonics generated in laser ablation plumes

  , APPLIED PHYSICS LETTERS, Vol: 104, ISSN: 0003-6951
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  • Citations: 15
• Conference paper
  McGrath F, Hawkins P, Simpson E, Siegel T, Diveki Z, Austin D, Zair A, Castillejo M, Marangos JPet al., 2014,

  Extending HHG Spectroscopy to New Molecular Species

  , Conference on Ultrafast Phenomena and Nanophotonics XVIII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
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  • Citations: 3
• Journal article
  Weber SJ, Oppermann M, Marangos JP, 2013,

  Role of Rotational Wave Packets in Strong Field Experiments

  , PHYSICAL REVIEW LETTERS, Vol: 111, ISSN: 0031-9007
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  • Citations: 21
• Journal article
  Ganeev RA, Witting T, Hutchison C, Strelkov VV, Frank F, Castillejo M, Lopez-Quintas I, Abdelrahman Z, Tisch JWG, Marangos JPet al., 2013,

  Comparative studies of resonance enhancement of harmonic radiation in indium plasma using multicycle and few-cycle pulses

  , PHYSICAL REVIEW A, Vol: 88, ISSN: 1050-2947
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  • Citations: 28
• Journal article
  Leeuwenburgh J, Cooper B, Averbukh V, Marangos JP, Ivanov Met al., 2013,

  High-Order Harmonic Generation Spectroscopy of Correlation-Driven Electron Hole Dynamics.

  , Physical Review Letters, Vol: 111

  We show how high-order harmonic generation spectroscopy can be used to follow correlation-driven electron hole dynamics with attosecond time resolution. The technique is applicable both to normal Auger transitions and to electron hole migration processes that do not lead to secondary electron emission. We theoretically simulate the proposed spectroscopy for M_{4,5}NN Auger decay in Kr and for correlation-driven inner-valence hole dynamics in trans-butadiene and propanal.

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• Journal article
  Ganeev RA, Hutchison C, Lopez-Quintas I, McGrath F, Lei DY, Castillejo M, Marangos JPet al., 2013,

  Ablation of nanoparticles and efficient harmonic generation using a 1-kHz laser

  , PHYSICAL REVIEW A, Vol: 88, ISSN: 1050-2947
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  • Citations: 22
• Journal article
  Zair A, Siegel T, Sukiasyan S, Risoud F, Brugnera L, Hutchison C, Diveki Z, Auguste T, Tisch JWG, Salieres P, Ivanov MY, Marangos JPet al., 2013,

  Molecular internal dynamics studied by quantum path interferences in high order harmonic generation

  , CHEMICAL PHYSICS, Vol: 414, Pages: 184-191, ISSN: 0301-0104
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  • Citations: 18
• Journal article
  Ganeev RA, Hutchison C, Witting T, Frank F, Weber S, Okell WA, Fiordilino E, Cricchio D, Persico F, Zair A, Tisch JWG, Marangos JPet al., 2013,

  High-order harmonic generation in fullerenes using few- and multi-cycle pulses of different wavelengths

  , JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 30, Pages: 7-12, ISSN: 0740-3224
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  • Citations: 28
• Journal article
  Hutchison C, Ganeev RA, Castillejo M, Lopez-Quintas I, Zair A, Weber SJ, McGrath F, Abdelrahman Z, Oppermann M, Martin M, Lei DY, Maier SA, Tisch JWG, Marangos JPet al., 2013,

  Comparison of high-order harmonic generation in uracil and thymine ablation plumes

  , PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 15, Pages: 12308-12313, ISSN: 1463-9076
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  • Citations: 18
• Journal article
  Witting T, Weber SJ, Tisch JWG, Marangos JPet al., 2012,

  Spatio-temporal characterization of mid-infrared laser pulses with spatially encoded spectral shearing interferometry

  , OPTICS EXPRESS, Vol: 20, Pages: 27974-27980, ISSN: 1094-4087
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  • Citations: 11
• Journal article
  Ganeev RA, Witting T, Hutchison C, Frank F, Tudorovskaya M, Lein M, Okell WA, Zair A, Marangos JP, Tisch JWGet al., 2012,

  Isolated sub-fs XUV pulse generation in Mn plasma ablation

  , OPTICS EXPRESS, Vol: 20, Pages: 25239-25248, ISSN: 1094-4087
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  • Citations: 28
• Journal article
  Ganeev RA, Hutchison C, Witting T, Frank F, Okell WA, Zair A, Weber S, Redkin PV, Lei DY, Roschuk T, Maier SA, Lopez-Quintas I, Martin M, Castillejo M, Tisch JWG, Marangos JPet al., 2012,

  High-order harmonic generation in graphite plasma plumes using ultrashort laser pulses: a systematic analysis of harmonic radiation and plasma conditions

  , JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 45, ISSN: 0953-4075
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  • Citations: 38
• Journal article
  Frank F, Arrell C, Witting T, Okell WA, McKenna J, Robinson JS, Haworth CA, Austin D, Teng H, Walmsley IA, Marangos JP, Tisch JWGet al., 2012,

  Invited Review Article: Technology for Attosecond Science

  , REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 83, ISSN: 0034-6748
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  • Citations: 52
• Journal article
  Petrovic VS, Siano M, White JL, Berrah N, Bostedt C, Bozek JD, Broege D, Chalfin M, Coffee RN, Cryan J, Fang L, Farrell JP, Frasinski LJ, Glownia JM, Guhr M, Hoener M, Holland DMP, Kim J, Marangos JP, Martinez T, McFarland BK, Minns RS, Miyabe S, Schorb S, Sension RJ, Spector LS, Squibb R, Tao H, Underwood JG, Bucksbaum PHet al., 2012,

  Transient X-Ray Fragmentation: Probing a Prototypical Photoinduced Ring Opening

  , Physical Review Letters, Vol: 108, Pages: 253006-1-253006-4

  We report the first study of UV-induced photoisomerization probed via core ionization by an x-ray laser. We investigated x-ray ionization and fragmentation of the cyclohexadiene-hexatriene system at 850 eV during the ring opening. We find that the ion-fragmentation patterns evolve over a picosecond, reflecting a change in the state of excitation and the molecular geometry: the average kinetic energy per ion fragment and H+ ion count increase as the ring opens and the molecule elongates. We discuss new opportunities for molecular photophysics created by optical pump x-ray probe experiments.

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• Journal article
  Hutchison C, Ganeev RA, Witting T, Frank F, Okell WA, Tisch JWG, Marangos JPet al., 2012,

  Stable generation of high-order harmonics of femtosecond laser radiation from laser produced plasma plumes at 1 kHz pulse repetition rate

  , OPTICS LETTERS, Vol: 37, Pages: 2064-2066, ISSN: 0146-9592
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  • Citations: 41
• Journal article
  Witting T, Frank F, Okell WA, Arrell CA, Marangos JP, Tisch JWGet al., 2012,

  Sub-4-fs laser pulse characterization by spatially resolved spectral shearing interferometry and attosecond streaking

  , JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 45, ISSN: 0953-4075
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  • Citations: 30
• Journal article
  Cryan JP, Glownia JM, Andreasson J, Belkacem A, Berrah N, Blaga CI, Bostedt C, Bozek J, Cherepkov NA, DiMauro LF, Fang L, Gessner O, Guehr M, Hajdu J, Hertlein MP, Hoener M, Kornilov O, Marangos JP, March AM, McFarland BK, Merdji H, Messerschmidt M, Petrovic VS, Raman C, Ray D, Reis DA, Semenov SK, Trigo M, White JL, White W, Young L, Bucksbaum PH, Coffee RNet al., 2012,

  Molecular frame Auger electron energy spectrum from N-2

  , JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 45, ISSN: 0953-4075
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  • Citations: 20
• Journal article
  Ganeev RA, Witting T, Hutchison C, Frank F, Redkin PV, Okell WA, Lei DY, Roschuk T, Maier SA, Marangos JP, Tisch JWGet al., 2012,

  Enhanced high-order-harmonic generation in a carbon ablation plume

  , PHYSICAL REVIEW A, Vol: 85, ISSN: 1050-2947
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  • Citations: 53

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