Probing O<sup>+</sup><sub>2</sub> potential curves with an XUV–IR pump–probe experiment

Cörlin, Philipp; Fischer, Andreas; Schönwald, Michael; Sperl, Alexander; Mizuno, Tomoya; Thumm, Uwe; Pfeifer, Thomas; Moshammer, R.

doi:10.1088/1742-6596/635/11/112060

Cited by 4 publications

(4 citation statements)

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“…In the case of diatomics, most experimental and theoretical efforts have concentrated on the O 2 , CO, and N 2 molecules. For example, attosecond pulse trains combined with NIR femtosecond probe pulses have been used to investigate dissociation dynamics and vibrational motion in the O 2 + molecular cation, 406,407 and narrow-band EUV excitation has been exploited to study autoionization in O 2 . 408 Also, waveformcontrolled high-intensity NIR pulses have been used to investigate ultrafast electron dynamics in CO. 409 By combining attosecond pulse trains with VMI spectroscopy, the autoionization dynamics of N 2 has been recently investigated.…”

Section: Beyond H 2 : Electron Dynamics In More Complex Diatomics And...mentioning

confidence: 99%

Attosecond Electron Dynamics in Molecules

et al. 2017

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Advances in attosecond science have led to a wealth of important discoveries in atomic, molecular, and solid-state physics and are progressively directing their footsteps toward problems of chemical interest. Relevant technical achievements in the generation and application of extreme-ultraviolet subfemtosecond pulses, the introduction of experimental techniques able to follow in time the electron dynamics in quantum systems, and the development of sophisticated theoretical methods for the interpretation of the outcomes of such experiments have raised a continuous growing interest in attosecond phenomena, as demonstrated by the vast literature on the subject. In this review, after introducing the physical mechanisms at the basis of attosecond pulse generation and attosecond technology and describing the theoretical tools that complement experimental research in this field, we will concentrate on the application of attosecond methods to the investigation of ultrafast processes in molecules, with emphasis in molecules of chemical and biological interest. The measurement and control of electronic motion in complex molecular structures is a formidable challenge, for both theory and experiment, but will indubitably have a tremendous impact on chemistry in the years to come.

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Section: Beyond H 2 : Electron Dynamics In More Complex Diatomics And...mentioning

confidence: 99%

Attosecond Electron Dynamics in Molecules

et al. 2017

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“…Thereby, we gain insight into the state-specific molecular breakup including experimentally distinguishing both competing dissociation channels and determine its dissociation time, which is strongly influenced by the interplay of the parallel tunneling and predissociation channel. In the future, this scheme can be applied to molecular systems, allowing both precision tests of state-of-the-art quantum dynamics theory in small molecules (44)(45)(46) as well as time-resolving state-specific molecular dynamics in more complex systems with a broad dynamic range from nanoseconds to femtoseconds. It will be possible to experimentally address questions about intermediate states or electronic changes faster than or in interplay with structural dynamics (47).…”

Section: Discussionmentioning

confidence: 99%

Time-resolving state-specific molecular dissociation with XUV broadband absorption spectroscopy

Magunia,

Rebholz,

Appi

et al. 2023

Sci. Adv.

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The electronic and nuclear dynamics inside molecules are essential for chemical reactions, where different pathways typically unfold on ultrafast timescales. Extreme ultraviolet (XUV) light pulses generated by free-electron lasers (FELs) allow atomic-site and electronic-state selectivity, triggering specific molecular dynamics while providing femtosecond resolution. Yet, time-resolved experiments are either blind to neutral fragments or limited by the spectral bandwidth of FEL pulses. Here, we combine a broadband XUV probe pulse from high-order harmonic generation with an FEL pump pulse to observe dissociation pathways leading to fragments in different quantum states. We temporally resolve the dissociation of a specific O 2 + state into two competing channels by measuring the resonances of ionic and neutral fragments. This scheme can be applied to investigate convoluted dynamics in larger molecules relevant to diverse science fields.

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“…By varying the relative delay between an IR field and an attosecond pulse train, Siu et al showed a dependence of the branching rations of different ionic fragmentation channels in O 2 [111]. A similar scheme was employed in [112], but this time using a reaction microscope for the detection: by measuring over a large pump-probe delay range, the authors were are able to resolve the first (half-)revival of the wave packet (40 fs). This oscillation is caused by a time-dependent vibrational wave packet in the potential of the binding O + 2 (a 4 Π u ) state, which is then probed by resonant absorption of an IR photon to the O + 2 (f 4 Π g ) state.…”

Section: Small and Medium Size Moleculesmentioning

confidence: 99%

Attosecond spectroscopy for the investigation of ultrafast dynamics in atomic, molecular and solid-state physics

2022

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Since the ﬁrst demonstration of the generation of attosecond pulses (1 as = 10-18s) in the extreme-ultraviolet (XUV) spectral region, several measurement techniques have been introduced, at the beginning for the temporal characterization of the pulses, and immediately after for the investigation of electronic and nuclear ultrafast dynamics in atoms, molecules and solids with unprecedented temporal resolution. The attosecond spectroscopic tools established in the last two decades, together with the development of sophisticated theoretical methods for the interpretation of the experimental outcomes, allowed to unravel and investigate physical processes never observed before, such as the delay in photoemission from atoms and solids, the motion of electrons in molecules after prompt ionization which precede any notable nuclear motion, the temporal evolution of the tunneling process in dielectrics, and many others. This review focused on applications of attosecond techniques to the investigation of ultrafast processes in atoms, molecules and solids. Thanks to the introduction and ongoing developments of new spectroscopic techniques, the attosecond science is rapidly moving towards the investigation, understanding and control of coupled electron-nuclear dynamics in increasingly complex systems, with ever more accurate and complete investigation techniques. Here we will review the most common techniques presenting the latest results in atoms, molecules and solids.

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Probing O⁺₂ potential curves with an XUV–IR pump–probe experiment

Cited by 4 publications

References 2 publications

Attosecond Electron Dynamics in Molecules

Attosecond Electron Dynamics in Molecules

Time-resolving state-specific molecular dissociation with XUV broadband absorption spectroscopy

Attosecond spectroscopy for the investigation of ultrafast dynamics in atomic, molecular and solid-state physics

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Probing O+2 potential curves with an XUV–IR pump–probe experiment

Cited by 4 publications

References 2 publications

Attosecond Electron Dynamics in Molecules

Attosecond Electron Dynamics in Molecules

Time-resolving state-specific molecular dissociation with XUV broadband absorption spectroscopy

Attosecond spectroscopy for the investigation of ultrafast dynamics in atomic, molecular and solid-state physics

Contact Info

Product

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Probing O⁺₂ potential curves with an XUV–IR pump–probe experiment