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O: Fachverband Oberflächenphysik

O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)

O 27.71: Poster

Dienstag, 24. März 2009, 18:30–21:00, P2

3D-Nanofocusing through the superposition of dipole radiation from second-harmonic emitters — •Philipp Reichenbach, Phillip Olk, and Lukas Eng — Institut für Angewandte Photophysik, Dresden, Germany

Much research has been carried out on the optical second-harmonic (SH) generation from single metallic nanoparticles (MNP). We theoretically investigate how the second-harmonic radiation from multiple MNP emitters can be superposed to form a nanofocus in 3-dimensional space.
At first we considered the possible SH radiation emitted by single spherical and cone-shaped particles, respectively. Especially nanocones seem to be good dipole SH emitters. Secondly, the SH radiation of multiple particles is then superposed. Arranging MNPs on a circle (for instance) results in a nanofocus of ca. λ/3 in diameter, where the focal position can be tuned in space through dictinct phase conditioning, such as tilting of the exciting beam.