scholarly journals Ionization and dissociation dynamics of vinyl bromide probed by femtosecond extreme ultraviolet transient absorption spectroscopy

2014 ◽  
Vol 140 (6) ◽  
pp. 064311 ◽  
Author(s):  
Ming-Fu Lin ◽  
Daniel M. Neumark ◽  
Oliver Gessner ◽  
Stephen R. Leone
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Transient Absorption Spectroscopy ◽  
Vinyl Bromide ◽  
Dissociation Dynamics

scholarly journals Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy

2016 ◽  
Vol 18 (21) ◽  
pp. 14644-14653 ◽  
Author(s):  
Adam S. Chatterley ◽  
Florian Lackner ◽  
Daniel M. Neumark ◽  
Stephen R. Leone ◽  
Oliver Gessner
Keyword(s):  
Absorption Spectroscopy ◽  
Near Infrared ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Strong Field ◽  
Transient Absorption Spectroscopy ◽  
Time Resolved ◽  
Strong Field Ionization ◽  
Dissociation Dynamics ◽  
Ultraviolet Absorption Spectroscopy

Using femtosecond time-resolved extreme ultraviolet absorption spectroscopy, the dissociation dynamics of the haloalkane 1,2-dibromoethane (DBE) have been explored following strong field ionization by femtosecond near infrared pulses at intensities between 7.5 × 1013 and 2.2 × 1014 W cm−2.

scholarly journals Symmetry of molecular Rydberg states revealed by XUV transient absorption spectroscopy

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Peng Peng ◽  
Claude Marceau ◽  
Marius Hervé ◽  
P. B. Corkum ◽  
A. Yu. Naumov ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Rydberg States ◽  
Transient Absorption Spectroscopy ◽  
Electronic Transitions ◽  
Final States ◽  
Polarization Direction ◽  
Quasibound State

AbstractTransient absorption spectroscopy is utilized extensively for measurements of bound- and quasibound-state dynamics of atoms and molecules. The extension of this technique into the extreme ultraviolet (XUV) region with attosecond pulses has the potential to attain unprecedented time resolution. Here we apply this technique to aligned-in-space molecules. The XUV pulses are much shorter than the time during which the molecules remain aligned, typically $$<$$<100 fs. However, transient absorption is not an instantaneous probe, because long-lived coherences re-emit for picoseconds to nanoseconds. Due to dephasing of the rotational wavepacket, it is not clear if these coherences will be evident in the absorption spectrum, and whether the properties of the initial excitations will be preserved. We studied Rydberg states of N$${}_{2}$$2 and O$${}_{2}$$2 from 12 to 23 eV. We were able to determine the polarization direction of the electronic transitions, and hence identify the symmetry of the final states.

scholarly journals Coupled valence carrier and core-exciton dynamics in WS2 probed by few-femtosecond extreme ultraviolet transient absorption spectroscopy

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Hung-Tzu Chang ◽  
Alexander Guggenmos ◽  
Christopher T. Chen ◽  
Juwon Oh ◽  
Romain Géneaux ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics

scholarly journals Photo-induced dynamics in bromoform molecules studied by femtosecond XUV transient absorption spectroscopy

2019 ◽  
Vol 205 ◽  
pp. 06003
Author(s):  
Florian Lackner ◽  
Adam S. Chatterley ◽  
Benjamin W. Toulson ◽  
Daniel M. Neumark ◽  
Stephen R. Leone ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Strong Field ◽  
Transient Absorption Spectroscopy ◽  
Field Ionization ◽  
Strong Field Ionization ◽  
Dissociation Dynamics

Ultrafast dissociation dynamics in bromoform molecules initiated by UV (263 nm) excitation and by strong-field ionization are explored using femtosecond XUV transient absorption spectroscopy.

scholarly journals Ultrafast strong-field dissociation of vinyl bromide: An attosecond transient absorption spectroscopy and non-adiabatic molecular dynamics study

2021 ◽  
Vol 8 (3) ◽  
pp. 034104
Author(s):  
Florian Rott ◽  
Maurizio Reduzzi ◽  
Thomas Schnappinger ◽  
Yuki Kobayashi ◽  
Kristina F. Chang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Strong Field ◽  
Transient Absorption Spectroscopy ◽  
Vinyl Bromide ◽  
Field Dissociation

scholarly journals Direct Mapping of Curve-Crossing Dynamics in IBr by Attosecond Transient Absorption Spectroscopy

2019 ◽  
Author(s):  
Yuki Kobayashi ◽  
Kristina Chang ◽  
Tao Zeng ◽  
Daniel Neumark ◽  
Stephen Leone
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Transient Absorption Spectroscopy ◽  
Two Photon ◽  
Direct Mapping ◽  
Avoided Crossing ◽  
Iodine Monobromide ◽  
Rapid Switching ◽  
Electronic Character

<p> </p><p>The electronic character of photoexcited molecules can abruptly change at avoided crossings and conical intersections. Here, we report direct mapping of the coupled interplay between electrons and nuclei in a prototype molecule, iodine monobromide (IBr), using attosecond transient absorption spectroscopy. A few-femtosecond visible pulse resonantly excites the B(3_0+) state of IBr and the accompanying photodissociation dynamics are tracked by an attosecond extreme-ultraviolet pulse that simultaneously probes the I-4d and Br-3d corelevel absorption edges. Direct comparison with quantum mechanical simulations unambiguously identifies the core-level absorption features associated with adiabatic and diabatic channels at the B/Y avoided crossing and concurrent two-photon dissociation processes that involve the Y/Z avoided crossing. The results show clear evidence for rapid switching of valence molecularorbital occupations at the avoided crossing.</p> <p><br></p>

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