Darmstadt 2008 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 7: Quantenkontrolle

MO 7.3: Vortrag

Dienstag, 11. März 2008, 14:30–14:45, 3F

Time-resolved Observation and Control of Molecular Vibrations in single-beam CARS — •Bernhard von Vacano and Marcus Motzkus — Physikalische Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35043 Marburg, Germany

Molecular motion can be measured directly in time-resolved nonlinear Raman spectroscopy, such as coherent anti-Stokes Raman scattering (CARS). Furthermore, using shaped laser pulses, vibrational modes can selectively be excited and the motion of molecules be controlled.[1] The typical drawback of such experiments is their complexity. In the context of microscopy, it has been shown that CARS can successfully and simply be implemented in a single beam of shaped femtosecond laser pulses.[2] In this contribution we show the simultaneous observation and control of molecular vibrations with a single beam of shaped femtosecond laser pulses in the time domain. This technique allows the systematic study of the coherent control of vibrational dynamics,[3] and paves the way for a simple implementation of novel, highly specific schemes in chemical analytics, detection and microscopy based on CARS.

[1] A. M. Weiner, D. E. Leaird et al., Science 247, 1317-1319 (1990)

[2] N. Dudovich, D. Oron, Y. Silberberg, Nature 418, 512-514 (2002)

[3] B. von Vacano, M. Motzkus, J. Chem. Phys. 127, 144514 (2007)