Regensburg 2010 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 27: [O] Plasmonics and Nanooptics III (Joint Session DS/O/HL)
DS 27.4: Vortrag
Mittwoch, 24. März 2010, 11:15–11:30, H32
Analytic photoemission localization and switching in plasmonic nanoantennas by laser pulse shaping — Martin Aeschlimann1, Michael Bauer2, Daniela Bayer1, Tobias Brixner3, Stefan Cunovic4, Alexander Fischer1, Pascal Melchior1, Walter Pfeiffer4, Martin Rohmer1, Christian Schneider1, Christian Strüber4, •Philip Tuchscherer3, and Dmitri V. Voronine3 — 1Fachbereich Physik and Research Center OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany — 2Institut für Experimentelle und Angewandte Physik, Universität Kiel, Leibnizstr. 19, 24118 Kiel, Germany — 3Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 4Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
We experimentally achieve two-photon photoemission localization and switching on a subwavelength scale in plasmonic nanoantennas. Complex polarization-shaped laser pulses which are found in adaptive optimizations control the linear response of the nanostructure. We consider previous analytic investigations to identify the interference of two excited modes in the nanostructure as the main control mechanism. The optimal pulse shapes for switching are then found deterministically. Adaptive and analytic control schemes are compared, and agreement between both approaches is demonstrated.