Electron Spin Pumping of Rb Atoms on He Nanodroplets via Nondestructive Optical Excitation

Auböck, Gerald; Nagl, Johann; Callegari, Carlo; Ernst, Wolfgang

doi:10.1103/physrevlett.101.035301

Cited by 54 publications

(92 citation statements)

References 22 publications

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“…This observation is in line with earlier measurements of the fluorescence emissions of Na 2 molecules in triplet states, which indicated vibrational relaxation in the excited electronic state to take place on the time scale of the life time of the excited state due to spontaneous emission (∼ 10 ns) [27]. Recently, it was observed that desorption upon electronic excitation may even be completely inhibited in the case of Rb atoms excited in a particular laser wave length range [28].…”

Section: Introductionsupporting

confidence: 89%

Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets

Grüner

Schlesinger

Heister

et al. 2011

Phys. Chem. Chem. Phys.

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The vibrational wave-packet dynamics of diatomic rubidium molecules (Rb2) in triplet states formed on the surface of superfluid helium nanodroplets is investigated both experimentally and theoretically. Detailed comparison of experimental femtosecond pump-probe spectra with dissipative quantum dynamics simulations reveals that vibrational relaxation is the main source of dephasing. The rate constant for vibrational relaxation in the first excited triplet state 1 3 Σ + g is found to be constant γ ≈ 0.5 ns −1 for the lowest vibrational levels v < ∼ 15 and to increase sharply when exciting to higher energies.

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Section: Introductionsupporting

confidence: 89%

Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets

Grüner

Schlesinger

Heister

et al. 2011

Phys. Chem. Chem. Phys.

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“…Experiments involving electronic excitations of one alkali atom adsorbed on a helium cluster are available. [7][8][9][10][11][12][13][14][15][16] Some of them focused on the spectroscopy of helium-Rb exciplex formation. [7][8][9][10] Theoretical modeling of these experiments is still a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Electronically excited rubidium atom in a helium cluster or film

Leino

Viel

Zillich

2008

The Journal of Chemical Physics

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We present theoretical studies of helium droplets and films doped with one electronically excited rubidium atom Rb ‫ء‬ ͑ 2 P͒. Diffusion and path integral Monte Carlo approaches are used to investigate the energetics and the structure of clusters containing up to 14 helium atoms. The surface of large clusters is approximated by a helium film. The nonpair additive potential energy surface is modeled using a diatomic in molecule scheme. Calculations show that the stable structure of Rb ‫ء‬ He n consists of a seven helium atom ring centered at the rubidium, surrounded by a tirelike second solvation shell. A very different structure is obtained when performing a "vertical Monte Carlo transition." In this approach, a path integral Monte Carlo equilibration starts from the stable configuration of a rubidium atom in the electronic ground state adsorbed to the helium surface after switching to the electronically excited surface. In this case, Rb ‫ء‬ He n relaxes to a weakly bound metastable state in which Rb ‫ء‬ sits in a shallow dimple. The interpretation of the results is consistent with the recent experimental observations ͓G. Auböck et al., Phys. Rev. Lett. 101, 035301 ͑2008͔͒.

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“…69 The exact value may depend on the dopant species and on the state the dopant is excited to. 27,31,70 Unfortunately, the quality of the recorded data does not allow a more detailed analysis. Future two-color pump-probe experiments will improve the signal quality by choosing appropriate probe frequencies for single-photon PI.…”

Section: The Rb 3 Trimermentioning

confidence: 99%

Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments

Giese

Stienkemeier

Mudrich

et al. 2011

Phys. Chem. Chem. Phys.

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Homo-and heteronuclear alkali quartet trimers of the type K 3−n Rb n (n = 0, 1, 2, 3) formed on helium nanodroplets are probed by one-color femtosecond photoionization spectroscopy. The obtained frequencies are assigned to vibrations in different electronic states by comparison to high level ab initio calculations of the involved potentials including pronounced Jahn-Teller and spin-orbit couplings. Despite the fact that the resulting complex vibronic structure of the heavy alkali molecules complicates the comparison of experiment and theory we find good agreement for many of the observed lines for all species.

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Electron Spin Pumping of Rb Atoms on He Nanodroplets via Nondestructive Optical Excitation

Cited by 54 publications

References 22 publications

Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets

Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets

Electronically excited rubidium atom in a helium cluster or film

Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments

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