Code: TOB	Time Slot/Poster Number: 10:30 - 11:00 am	Session: Raman Imaging I
Vibrational Phase Contrast CARS Imaging
Herman Offerhaus
University of Twente, Enschede , Netherlands
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Summary
Resonances (of any kind) come with an amplitude and a phase. The phase is often ignored but in Coherent Anti-Stokes Raman Scattering (CARS), that phase is probed and the detected CARS signal carries the phase-response of the excited medium. Detection of this phase allows for the rejection of non-resonant components. It also allows for the simultaneous imaging of multiple substances that have overlapping resonances. The identification is based on identifying regions in the complex plane, defined by an amplitude and a phase, that belong to each substance.

Code: TOB	Time Slot/Poster Number: 11:00 - 11:30 am	Session: Raman Imaging I
CARS molecular fingerprinting using a white-light laser source
Hideaki Kano; Masanari Okuno; Hiro-o Hamaguchi
The University of Tokyo, Tokyo, Japan
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Summary
Coherent anti-Stokes Raman scattering (CARS) microscopy is now recognized as a powerful technique for label-free and noninvasive imaging of chemical and biological systems at the molecular level. Most of the CARS microscopy studies so far have focused on a limited molecular species such as lipids, and provided only monochromatic images at the C-H stretch bands. In the present study, we have extended the CARS technique from monochromatic imaging (microscopy) to multi-color imaging (microspectroscopy) using a novel white-light laser source in order to perform multi-color CARS imaging in the fingerprint region (molecular fingerprinting).

Code: TOB	Time Slot/Poster Number: 11:30 am - 12:00 pm	Session: Raman Imaging I
Quantitative CARS for Chemistry in Confinement
Katrin Domke1; Marianne H.F. Kox2; James Day1; Gianluca Rago1; Alex Riemer1; Eli Stavitski2; Bert M. Weckhuysen2; Mischa Bonn1
1FOM-Institute AMOLF, Amsterdam, Netherlands; 2Utrecht University, Debye Institute, Utrecht, Netherlands
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Summary
We have used broadband Coherent Anti-Stokes Raman Scattering CARS micro-spectroscopy in conjunction with maximum entropy method (MEM) data analysis to monitor and quantify small changes in the local chemical composition homogeneous and heterogeneous catalysis with submicron resolution. Specifically, we investigate (i) the precursor states of the catalytic polymerization of thiophene derivates in the pores of single crystal zeolite catalysts and (ii) the catalytic activity of homogeneous catalysts in microfluidic devices. The CARS spectra allow us to quantitatively track reactants and products, characterize the interaction between reactants, determine reaction rates and quantify the molecular distribution throughout zeolite crystals and microfluidic devices.

Code: TOB	Time Slot/Poster Number: 12:00 - 12:30 pm	Session: Raman Imaging I
Broadband Stimulated Raman Microscopy
Evelyn Ploetz; Benjamin Marx; Peter Gilch
Institut für Physikalische Chemie, HHU Düsseldorf, Düsseldorf, Germany
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Summary
Signal enhancement in Raman microscopy relies more and more on stimulated Raman scattering. With techniques based on a narrow bandwidth Raman pump and a broadband Raman probe pulse complete (stimulated) Raman spectra can be recorded simultaneously. Set-ups for this type of microscopy will be described and its application will be discussed.