Frankfurt 2006 – scientific programme

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MO: Molekülphysik

MO 28: Poster: Quantum Control

MO 28.6: Poster

Tuesday, March 14, 2006, 16:30–18:30, Labsaal

Single-beam CARS Microscopy employing Coherent Control Schemes — •B. von Vacano, W. Wohlleben, and M. Motzkus — Physikalische Chemie, Philipps-Universität, 35032 Marburg

Nonlinear Raman scattering allows spectroscopic characterization of samples with microscopic spatial resolution. CARS (Coherent Anti-Stokes Raman Scattering) is a nonlinear four-wave-mixing process, revealing the vibrational structure of molecular samples. Due to the nonlinearity of the process, the signal generation can be confined to a microscopic volume allowing chemical imaging. Single-beam CARS accomplishes a complete CARS scheme with tailored fs-pulses from one single broadband laser source by coherent control of the nonlinear signal generation [1].

Here, we compare different schemes for single-beam CARS. We present a single-beam approach for truly time resolved CARS spectroscopy [2] and discuss the applicability of single-beam CARS schemes for microscopic imaging.

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

[2] B. von Vacano, M. Motzkus. Optics Communications, submitted.