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Phys. Rev. B 76, 153402 (2007) [4 pages]

Surface-magnetoplasmon nonreciprocity effects in noble-metal/ferromagnetic heterostructures

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J. B. González-Díaz1, A. García-Martín1, G. Armelles1, J. M. García-Martín1, C. Clavero1, A. Cebollada1,2, R. A. Lukaszew3, J. R. Skuza3, D. P. Kumah2, and R. Clarke2
1Instituto de Microelectrónica de Madrid, Consejo Superior de Investigaciones Científicas, Isaac Newton 8, Tres Cantos, E-28760 Madrid, Spain
2FOCUS Center, University of Michigan, Ann Arbor, Michigan 48109, USA
3Physics and Astronomy Department, University of Toledo, Mstop 111, 2801 W. Bancroft, Toledo, Ohio 43606, USA

Received 6 August 2007; published 5 October 2007

We demonstrate magnetic field control of surface plasmon excitations in noble-metal/ferromagnetic/noble metal trilayers, analogous to the effects previously observed in semiconductor structures. We show that the coupling of an external magnetic field to the surface plasmon-polariton wave vector is greatly enhanced in the metallic structure due to the ferromagnetic nature of one of its constituents. The observed coupling could be used to modulate the surface plasmon response in ultrasensitive spectroscopic applications.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.153402
DOI:
10.1103/PhysRevB.76.153402
PACS:
78.20.Ls, 73.20.Mf, 78.66.Bz, 42.25.Bs