Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 77: Poster: Plasmonics and Nanooptics

O 77.7: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

Shaping Femtosecond Laser Pulses for Plasmonics — •Christoph Schnupfhagn, Moritz Heindl, Jonas Albert, and Markus Lippitz — Experimental Physics III, University of Bayreuth, Germany

Pulse shapers allow to modify phase and amplitude of ultrafast laser pulses in an almost arbitrary manner. This is especially favourable for nonlinear spectroscopy as electric fields for multiphoton processes can be precisely engineered. Combined with plasmonic nanostructures the optical near field can be controlled in space and time. In our experiment, we use a liquid crystal based spatial light modulator to reshape 8fs laser pulses in frequency space. The challenge is to couple the pulses into a high NA microscope without significant broadening in time domain. Here we present our experimental setup for pulse compression in the focal plane. Moreover, we give an overview how the spatiotemporal control of optical fields can be utilized in future experiments.