Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 13: PhD Symposium: Magnon Plasmonics (with jDPG)

MA 13.14: Poster

Dienstag, 1. April 2014, 15:01–15:45, HSZ 04

Plasmonic and magnonic waveguide excitations in Ni₈₁Fe₁₉-Au bilayer microstructures investigated by means of photoemission spectroscopy and Brillouin light scattering spectroscopy — •Philip Thielen^1,2, Markus Rollinger¹, Pascal Melchior¹, Thomas Meyer¹, Björn Obry¹, Burkard Hillebrands¹, and Martin Aeschlimann¹ — ¹Physics Department and Research Center OPTIMAS, University of Kaiserslautern, Germany — ²Graduate School of Excellence Materials Science in Mainz, Kaiserslautern, Germany

The interaction between magnons and plasmons has been scarcely investigated up to now. In our contribution, we present a preliminary study on the excitation of magnons and plasmons in microstructured Ni₈₁Fe₁₉-Au bilayers. Here, 8-15 µm wide Ni₈₁Fe₁₉ stripes act as spin-wave waveguides. The magnonic excitation is induced through the Oersted field of a microwave current in a Cu antenna situated on top of the waveguides. By means of Brillouin light scattering, the excitation of magnons in these waveguides is observed. Additionally, Au nanostructures on top of the Ni₈₁Fe₁₉ stripes serve as plasmonic waveguides and resonators. The optical excitation of propagating as well as localized surface plasmons in those structures is observed by employing photoemission electron microscopy. These first investigations show a way to examine magnonic as well as plasmonic excitations in the same structure, providing a starting point to study their interaction.