| 1. |
- Boguslavskiy, Andrey E., et al.
(författare)
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The Multielectron Ionization Dynamics Underlying Attosecond Strong-Field Spectroscopies
- 2012
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 335:6074, s. 1336-1340
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Tidskriftsartikel (refereegranskat)abstract
- Subcycle strong-field ionization (SFI) underlies many emerging spectroscopic probes of atomic or molecular attosecond electronic dynamics. Extending methods such as attosecond high harmonic generation spectroscopy to complex polyatomic molecules requires an understanding of multielectronic excitations, already hinted at by theoretical modeling of experiments on atoms, diatomics, and triatomics. Here, we present a direct method which, independent of theory, experimentally probes the participation of multiple electronic continua in the SFI dynamics of polyatomic molecules. We use saturated (n-butane) and unsaturated (1,3-butadiene) linear hydrocarbons to show how subcycle SFI of polyatomics can be directly resolved into its distinct electronic-continuum channels by above-threshold ionization photoelectron spectroscopy. Our approach makes use of photoelectron-photofragment coincidences, suiting broad classes of polyatomic molecules.
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| 2. |
- Carlström, Stefanos, et al.
(författare)
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General time-dependent configuration-interaction singles. I. Molecular case
- 2022
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Ingår i: Physical Review A. - 2469-9926. ; 106:4
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Tidskriftsartikel (refereegranskat)abstract
- We present a grid-based implementation of the time-dependent configuration-interaction singles method suitable for computing the strong-field ionization of small gas-phase molecules. After outlining the general equations of motion used in our treatment of this method, we present example calculations of strong-field ionization of He, LiH, H2O, and C2H4 that demonstrate the utility of our implementation. The following paper [S. Carlström et al., following paper, Phys. Rev. A 106, 042806 (2022)10.1103/PhysRevA.106.042806] specializes to the case of spherical symmetry, which is applied to various atoms.
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| 3. |
- Matsika, Spiridoula, et al.
(författare)
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Ultrafast Relaxation Dynamics of Uracil Probed via Strong Field Dissociative Ionization
- 2013
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Ingår i: The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory. - : American Chemical Society (ACS). - 1520-5215. ; 117:48, s. 12796-12801
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Tidskriftsartikel (refereegranskat)abstract
- We study the ultrafast relaxation dynamics of uracil excited to the first bright pi pi* state (S-2) by an ultrafast laser pulse in the deep ultraviolet (central wavelength lambda(0) = 260 nm). With a unique combination of strong field dissociative ionization measurements, state of the art strong field ionization calculations, and high level ab initio calculations of excited neutral and ionic states at critical points along the neutral potentials, we are able to gain a detailed picture of the relaxation dynamics of the molecule, which resolves earlier disagreements regarding measurements and calculations of the relaxation.
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