Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 3: Plasmonics and nanooptics I
O 3.6: Vortrag
Montag, 26. März 2012, 11:45–12:00, MA 005
Non - Linear Optical Imaging of Gold Nano - Cones with a Parabolic Mirror Microscope — •Anke Horneber1, Dai Zhang1, Monika Fleischer2, Kai Braun1, Dieter P. Kern2, and Alfred J. Meixner1 — 1Institute of Physical Chemistry,Eberhard Karls University Tübingen, Germany — 2Institute for Applied Physics, Eberhard Karls University Tübingen, Germany
Governed by the lightning rod effect and localized surface plasmon resonances, linear optical properties of metallic nanoantennas have been widely investigated [1]. In our latest work, we have combined a femtosecond erbium fibre laser (774 nm) with a home-built parabolic mirror (NA 0.998) assisted confocal optical microscope [2] to investigate the non-linear optical effects from nano structures of different materials, and geometries. Due to the intensely confined electric field at the tip apex and its centrosymmetry breaking geometry, single gold nano-cone showed dramatic non-linear optical properties, which depend sensitively on the polarization condition. Combined with numerical simulation, we will demonstrate and analyse systematically the non-linear optical imaging of individual gold nano-cones.
[1] M. Fleischer, C. Stanciu, F. Stade, J. Stadler, K. Braun, A. Heeren, M. Haeffner, D. P. Kern and A. J. Meixner, Appl. Phys. Lett. 93 (2008) 111114. [2] J. Stadler, C. Stanciu, C. Stupperich, and A. J. Meixner, Opt. Lett. 33 (2008) 681.