Imaging an aligned polyatomic molecule with laser-induced electron diffraction

Pullen, Michael G.; Wolter, Benjamin; Le, Anh-Thu; Baudisch, Matthias; Hemmer, Michaël; Senftleben, Arne; Schröter, C. D.; Ullrich, J.; Moshammer, R.; Lin, C. D.; Biegert, J.

doi:10.1038/ncomms8262

Cited by 192 publications

(176 citation statements)

References 30 publications

Supporting

Mentioning

171

Contrasting

Unclassified

Order By: Relevance

“…When the HHG process is properly phase matched, a bright coherent beam of extreme ultraviolet (EUV) or soft X-ray light is generated [6][7][8][9][10], which can be used to uncover coupled dynamics in materials with femtosecond-to-attosecond temporal resolution [11][12][13][14][15], and can also be used for high-resolution imaging [16][17][18][19]. Alternatively, if the electron does not recombine upon re-encountering the ion it may rescatter from the ion, encoding information about the sub-ångström and sub-femtosecond structure of the scattering potential into the photoelectron momentum distribution [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Observation of ionization enhancement in two-color circularly polarized laser fields

et al. 2017

View full text Add to dashboard Cite

When atoms are irradiated by two-color circularly polarized laser fields the resulting strong field processes are dramatically different than when the same atoms are irradiated by a single-color ultrafast laser. For example, electrons can be driven in complex 2D trajectories before rescattering or circularly polarized high harmonics can be generated, which was once thought impossible. Here, we show that two-color circularly polarized lasers also enable control over the ionization process itself and make a surprising finding: the ionization rate can be enhanced by up to 700% simply by switching the relative helicity of the two-color circularly polarized laser field. This enhancement is experimentally observed in helium, argon and krypton over a wide range of intensity ratios of the twocolor field. We use a combination of advanced quantum and fully classical calculations to explain this ionization enhancement as resulting in part due to the increased density of excited states available for resonance-enhanced ionization in counter-rotating fields compared with co-rotating fields. In the future, this effect could be used to probe the excited state manifold of complex molecules.

show abstract

Section: Introductionmentioning

confidence: 99%

Observation of ionization enhancement in two-color circularly polarized laser fields

et al. 2017

View full text Add to dashboard Cite

show abstract

“…These predictions were first demonstrated experimentally in 2008 [4]. Since then, several theoretical and experimental LIED related studies were performed in order to image time-resolved dynamics of molecular systems [5][6][7][8][9]. Closely related to LIED is the attosecond photoelectron holography imaging idea, again pioneered by A. D. Bandrauk and coworkers [10,11].…”

Section: Introductionmentioning

confidence: 99%

Laser-induced electron diffraction: inversion of photo-electron spectra for molecular orbital imaging

et al. 2017

View full text Add to dashboard Cite

In this paper, we discuss the possibility of imaging molecular orbitals from photoelectron spectra obtained via Laser Induced Electron Diffraction (LIED) in linear molecules. This is an extension of our work published recently in Physical Review A 94, 023421 (2016) to the case of the HOMO-1 orbital of the carbon dioxide molecule. We show that such an imaging technique has the potential to image molecular orbitals at different internuclear distances in a sub-femtosecond time scale and with a resolution of a fraction of an Angström.

show abstract

“…Therefore, real-time imaging of electron dynamics is one of the most important goals for modern ultrafast science [1][2][3][4][5][6][7][8][9]. In this article, we investigate the opportunities for applying ultrashort extreme ultraviolet (XUV) probe pulses inducing single-photon ionization for imaging coherent electron dynamics in molecules by means of timeand angle-resolved photoelectron spectroscopy (TRARPES), i.e., time-and energy-resolved molecular-frame photoelectron angular distributions.…”

Section: Introductionmentioning

confidence: 99%

Imaging electron dynamics with time- and angle-resolved photoelectron spectroscopy

2016

View full text Add to dashboard Cite

We theoretically study how time-and angle-resolved photoemission spectroscopy can be applied for imaging coherent electron dynamics in molecules. We consider a process in which a pump pulse triggers coherent electronic dynamics in a molecule by creating a valence electron hole. An ultrashort extreme ultraviolet probe pulse creates a second electron hole in the molecule. Information about the electron dynamics is accessed by analyzing angular distributions of photoemission probabilities at a fixed photoelectron energy. We demonstrate that a rigorous theoretical analysis, which takes into account the indistinguishability of transitions induced by the ultrashort, broadband probe pulse and electron hole correlation effects, is necessary for the interpretation of time-and angle-resolved photoelectron spectra. We show how a Fourier analysis of time-and angle-resolved photoelectron spectra from a molecule can be applied to follow its electron dynamics by considering photoelectron distributions from an indole molecular cation with coherent electron dynamics.

show abstract

Imaging an aligned polyatomic molecule with laser-induced electron diffraction

Cited by 192 publications

References 30 publications

Observation of ionization enhancement in two-color circularly polarized laser fields

Observation of ionization enhancement in two-color circularly polarized laser fields

Laser-induced electron diffraction: inversion of photo-electron spectra for molecular orbital imaging

Imaging electron dynamics with time- and angle-resolved photoelectron spectroscopy

Contact Info

Product

Resources

About