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ResearchVan Swinderen Institute

Prof. dr. T. Brixner, Julius-Maximilians-University Würzburg, Germany: Ultrafast nano-control and nano-spectroscopy


27 October 2011 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Prof. dr. Tobias Brixner
Affiliation: Julius-Maximilians-University Würzburg, Germany
Title: Ultrafast nano-control and nano-spectroscopy
Date: 27-10-2011
Start: 16.00 (Doors open and coffee available at 15.30)
Location: FWN-Building 5111.0080
Host: Thomas la Cour Jansen


Light cannot be focused to better than half its wavelength; the well-known diffraction limit thus prevents spatially resolved spectroscopy of individual nanostructures and their ultrafast dynamic processes. This talk will show how we can circumvent that limit and gain access to the nanometer spatial scale on a femtosecond time scale using coherent control concepts [Nature 446, 301 (2007); PNAS 107, 5329 (2010)]. Recently, we have combined this approach with coherent two-dimensional spectroscopy. Thus we were able to realize four-wave mixing experiments with 50 nm spatial resolution [Science, 11 August 2011 (10.1126/science.1209206)]. Unexpected long electronic phase coherences in metal nanostructures were observed and explained. Applications are envisaged for nonlinear spectroscopy of nanostructures, molecular aggregates or “artificial molecules” on surfaces, nanophotonic circuits, photovoltaic devices, coupled quantum dots, and others. It should thus become possible in the future to study a broad range of fascinating quantum phenomena with direct space–time resolution.

Last modified:12 September 2014 11.21 a.m.