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25 April 2024 |
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Overcoming blockade in producing doubly-excited dimers by a single intense pulse and their decay | | Ph. V. Demekhin
; K. Gokhberg
; G. Jabbari
; S. Kopelke
; A. I. Kuleff
; L. S. Cederbaum
; | | Date: |
25 Sep 2012 | | Abstract: | Excitation of two identical species in a cluster by the absorption of two
photons of the same energy is strongly suppressed since the excitation of one
subunit blocks the excitation of the other one due to the binding Coulomb
interaction. Here, we propose a very efficient way to overcome this blockade in
producing doubly-excited homoatomic clusters by a single intense laser pulse.
For Ne$_2$ it is explicitly demonstrated that the optimal carrier frequency of
the pulse is given by half of the energy of the target state, which allows one
to doubly excite more than half of the dimers at moderate field intensities.
These dimers then undergo ultrafast interatomic decay bringing one Ne to its
ground state and ionizing the other one. The reported emph{ab initio} electron
spectra present reliable predictions for future experiments by strong laser
pulses. | | Source: | arXiv, 1209.5592 | | Services: | Forum | Review | PDF | Favorites | |
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