Mainz 2017 – scientific programme

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MO: Fachverband Molekülphysik

MO 16: Posters 3: Experimental Techniques and Theoretical Approaches

MO 16.9: Poster

Thursday, March 9, 2017, 17:00–19:00, P OG1

Fluorescence measurement of gas phase molecules by a single photon detector — •Sharmila Sait, Alexander Kastner, Philipp Schmidt, Arne Senftleben, Thomas Baumert, Andre Knie, Arno Ehresmann, and Martin Pitzer — Institute for Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel

Being one of the oldest techniques in molecular physics, fluorescence spectroscopy is broadly used and still advancing in a wide range of application. Time-resolved detection of single photons has over the last two decades become an established technique to study dynamics and solvent effects of biomolecules in solution. Nevertheless, obtaining a complete picture, i.e. spectral and polarization information, still requires scans or arrays of photomultipliers [1]. This poster highlights a novel, time efficient and portable setup for measuring the behavior of isolated molecules in gas phase. The synchrotron radiation is focused on the sample. Emitted fluorescence is passed through a Wollaston prism, diffraction grating and detected by a time and position sensitive single photon detector [2]. Consequently, polarization, wavelength and lifetime of fluorescence of each photon are recorded in a single measurement.

[1] Becker, et al., Microscopy Research and Technique 70, 403-409 (2007)

[2] A. Czasch et al., Nuclear Instruments and Methods in Physics Research A 580 (2007) 1066-1070