Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 20: Ultrashort Laser Pulses and Biophotonics
Q 20.2: Talk
Tuesday, March 10, 2020, 14:15–14:30, f435
Saturated Femtosecond Stimulated Raman Scattering for Sub-Diffraction-Limited Label-Free Imaging — •Thomas Würthwein1, Niels Irwin1, and Carsten Fallnich1,2 — 1Institute of Applied Physics, University of Münster, Corrensstraße 2, 48149 Münster, Germany — 2MESA+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands
We present a scheme for a sub-diffraction-limited Raman microscope. The scheme combines the concept from stimulated depletion microscopy with femtosecond stimulated Raman scattering. The suppression of the Raman signal in a three-beam setup with only two involved wavelength-components was accomplished by the saturation of the Raman scattering. A reduction of the Raman signal of up to 79 % could be measured, with only a single Raman resonance involved. Based on this signal suppression a resolution enhancement by a factor of 2 could be verified in a first proof-of-concept measurement, opening up a pathway towards label-free sub-diffraction-limited Raman imaging.