Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 74: Teilchenoptik

Q 74.1: Vortrag

Mittwoch, 9. März 2005, 14:00–14:15, HU 2014a

Fluorescence as a detection scheme for molecule interferometry — •André Stefanov, Sarayut Deachapunya, Fabienne Goldfarb, Elisabeth Reiger, Alexander Stibor, and Markus Arndt — Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, 1090 Wien

An important issue in matter-wave interferometry with very large molecules (>3000 amu) is to find a suitable detection scheme for large neutral particles. Since the fluorescence properties of chromophore molecules do not degrade but even often improve with increasing complexity it is interesting to compare different fluorescence detection methods which could be used to record interferograms of large molecules. For evaluating the methods we used tetraphenylporphyrins (TPP) as they can be easily sublimated to form a beam and interferometry with TPP has already been demonstrated. While the in-flight detection of a chromophore beam requires a high beam density, the accumulation of deposited molecules on a surface is rather sensitive. We investigate the direct imaging of surface adsorbed molecule interferograms as well as novel methods to magnifiy interferograms which could not possibly be resolved within the Abbe limit of optical microscopy. We present the results of such depositions on different surfaces and the future applications for interferometry with very large molecules as well as for molecule lithography.