Hamburg 2009 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Molekülphysik Poster 1
MO 13.44: Poster
Tuesday, March 3, 2009, 16:30–19:00, VMP 8 Foyer
Manipulating large neutral molecules with electric fields — •Frank Filsinger1, Jochen Küpper1, Kirstin Wohlfart1, Undine Erlekam1, Gert von Helden1, Gerard Meijer1, Jonas L. Hansen2, Jens H. Nielsen2, Lotte Holmegaard2, Iftach Nevo2, Jochen Maurer2, and Henrik Stapelfeldt2 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 2Århus University, Århus, Denmark
It is well-known that polar molecules can be manipulated using strong electric fields. Many techniques have been developed for the manipulation of small molecules in low-field-seeking quantum states. However, application of these techniques to large molecules is not straightforward, because, for larger molecules, all states are high-field seeking at the relevant electric field strengths.
In order to spatially focus molecules in high-field seeking quantum states, one has to use alternating gradient (dynamic) focusing [1]. This method has been successfully applied, for instance, for the alternating gradient deceleration of benzonitrile [2] and for the conformer selection of 3-aminophenol in an m/µ-selector [3]. Alternatively also static electric fields can be exploited for quantum state and conformer selection.
Here we will compare the different approaches to manipulate large neutral molecules with electric fields and discuss applications of conformer (and quantum-state) selected molecules.
[1] H.L. Bethlem et al., J. Phys. B 39 (2006), R263.
[2] K. Wohlfart et al., Phys. Rev. A 77(3), (2008), 031404(R)
[3] F. Filsinger et al., Phys. Rev. Lett. 100, (2008), 133003