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Q: Fachverband Quantenoptik und Photonik
Q 34: Ultrashort laser pulses: Applications
Q 34.2: Talk
Tuesday, March 19, 2013, 14:15–14:30, F 142
Sub-diffraction-limited spatial resolution in CARS microscopy — Carsten Cleff1, Petra Groß1, Chris Lee2, Kai Kruse2, Willem Beeker2, Herman Offerhaus2, Jennifer Herek2, Klaus Boller2, and •Carsten Fallnich1 — 1WWU Münster, Münster, Germany — 2University of Twente, Enschede, The Netherlands
Based on the density matrix formalism we investigate CARS signal suppression enabling spatial resolution below the diffraction limit. Pulsed control light fields are used to manipulate the population distribution of the CARS sample in order to achieve a saturable suppression of the CARS process. If the control light fields are applied with a donut-shaped beam profile the saturable suppression of CARS signal generation can be used to enhance the spatial resolution beyond the diffraction limit similar to STED microscopy. Using computer-generated test images we numerically demonstrate sub-diffraction-limited spatial resolution in CARS microscopy down to 18 nm.
[1] Cleff et al., PRA 86, 023825 (2012)