Dresden 2009 – wissenschaftliches Programm

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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 27.19: Poster

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

Detecting resonant modes of plasmon-polaritons and phonon-polaritons using a NSThM — •David Hellmann, Achim Kittel, and Uli F. Wischnath — EHF, Fak. V, Physik, Carl von Ossietzky Universität Oldenburg

With a Near-field Scanning Thermal Microscope (NSThM) the heat transfer between a sample and a probe can be measured [1,2]. The NSThM combines a STM tip with a coaxial thermocouple sensor and, thus, can collect data concerning the heat transfer a few nm above the scanned surface along with usual STM maps. Evanescent thermal radiation has been investigated recently by De Wilde et al. at larger sample-tip distances (200 nm to some μm) [3]. The authors find resonant modes of surface plasmon-polaritons and phonon-polaritons on certain structures. Subject of this study are NSThM measurements on structures where such resonances can be expected. With the NSThM it is possible to investigate the influence of those resonant modes on the heat transfer in the direct vicinity of the samples surface in the range from about 1 nm to a few tens of nanometers.

Literature [1] A. Kittel et al., PRL 95, 224301 (2005) [2] U. Wischnath, RSI 79, 073708 2008 [3] Y. De Wilde et al., Nature Vol 444, 7.12.2006, p.740-743