caa a22 4500 445868414 CHVBK 20180317145505.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1140/epjd/e2010-10504-5 doi (NATIONALLICENCE)springer-10.1140/epjd/e2010-10504-5 Two-step excitation of Rb atoms on He nanodroplets [Elektronische Daten] [M. Theisen, F. Lackner, F. Ancilotto, C. Callegari, W. E. Ernst] Abstract.: We present the first sequential laser excitation of atom-doped helium nanodroplets. Rubidium atoms on the surface of helium nanodroplets are selectively excited with a continuous wave laser to the 52P1/2 state so as not to desorb from the nanodroplets. From there they are excited by a laser pulse to the 52D state; a laser-induced fluorescence (LIF) spectrum is recorded by monitoring the 62P $\rightarrow$ 52S1/2 emission. The LIF spectrum differs from that of the two-photon one-color direct excitation spectrum 52D $\leftarrow$ 52S1/2, indicating that the system does relax vibrationally during the lifetime of the 52P1/2 state. To model the LIF spectra we use calculated energy levels of the Rb atom as a function of its distance R from the center of the helium nanodroplet. The Franck-Condon factors of the resulting potential energy curves agree with the experimental spectra. In the future the 52P1/2 state can be used as a springboard to reach high-lying 2S and 2D states, and possibly create an artificial super-atom. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Theisen M. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut Lackner F. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut Ancilotto F. Dipartimento di Fisica ‘G. Galilei', Università di Padova, via Marzolo 8, 35131, Padova, Italy aut Callegari C. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut Ernst W. E. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut The European Physical Journal D Springer-Verlag 61/2(2011-01-01), 403-408 1434-6060 61:2<403 2011 61 10053 https://doi.org/10.1140/epjd/e2010-10504-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2010-10504-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Theisen M. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Lackner F. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Ancilotto F. Dipartimento di Fisica ‘G. Galilei', Università di Padova, via Marzolo 8, 35131, Padova, Italy aut NATIONALLICENCE 700 1- Callegari C. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Ernst W. E. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010, Graz, Austria aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 61/2(2011-01-01), 403-408 1434-6060 61:2<403 2011 61 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer