Dresden 2014 – wissenschaftliches Programm

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AGjDPG: Arbeitsgruppe junge DPG

AGjDPG 2: PhD Symposium: Magnon Plasmonics (jointly with MA)

AGjDPG 2.2: Topical Talk

Dienstag, 1. April 2014, 10:15–10:45, HSZ 04

Nanomagnonics - reprogrammable wave control beyond plasmonics — •Dirk Grundler — Lehrstuhl fuer Physik funktionaler Schichtsysteme, Physik Department, TU Muenchen, Garching, Germany

Periodically nanopatterned thin-film ferromagnets have been shown to form magnonic crystals (MCs) [1], i.e., artificial crystals exhibiting tailored band structures for spin waves (magnons). In the GHz frequency regime, wave lengths of spin waves (SWs) are shorter by a few orders of magnitude compared to electromagnetic waves at the same frequency. At the same time unit cells of periodic magnetic lattices can exhibit different non-volatile remanent configurations leading to both reconfigurable band structures [2] and metamaterials properties for SWs [3] not known from photonics or plasmonics. MCs thereby offer a further approach for wave control in solid-state devices on the nanoscale. We show reprogrammable magnonic properties that might fuel further ideas when plasmonics meets magnonics.

Parts of the research have received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement No. 228673 MAGNONICS and No. 247556 NoWaPhen, the DFG project GR1640/5-1 in SPP 1538 and the German Excellence Cluster ’Nanosystems Initiative Munich (NIM)’.

[1] S. A. Nikitov, P. Tailhades, and C. S. Tsai, J. Magn. Magn. Mater. 236, 320 (2001). [2] J. Topp, D. Heitmann, M. Kostylev, and D. Grundler, Phys. Rev. Lett. 104, 207205 (2010). [3] R. Huber et al., Appl. Phys. Lett. 102, 012403 (2013).