Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.39: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Laser-triggered electron emission from a Schottky emitter assembly — •Reiner Bormann, Stefanie Strauch, Max Gulde, Simon Schweda, Sascha Schäfer, and Claus Ropers — Materials Physics Institute and Courant Research Centre, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

Laser-triggered electron emission form sharp metal tips offers great potential for future pulsed high-brightness electron sources in ultrafast transmission electron microscopy (UTEM). However, their implementation in the advanced electron optics setup of an electron microscope is challenging. As part of the Göttingen UTEM initiative, we investigate the laser-induced electron emission characteristics of a Schottky emitter as utilized in commercial transmission electron microscopes. Specifically, we focus on the angular emission pattern and energy spread of the photoemitted electrons depending on the laser fluence, pulse duration and photon energy.