Volume 68, Number 5, December 2004
|Page(s)||692 - 698|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||05 November 2004|
Plasmon transport phenomena on a continuous ferromagnetic surface
School of Engineering and Computer Science, University of Exeter Exeter, EX4 4QF, UK
2 Facultad de Física, Pontificia Universidad Católica de Chile - Santiago, Chile
Accepted: 12 October 2004
Evidence is presented showing the transport properties of surface plasmons sensitive to the magnetization of the surface on which they are traveling. A magneto-plasmon interaction linear in sample magnetization is recorded for plasmons propagating on a continuous nickel surface when an applied field drives the magnetization along a direction within the surface transverse to the plasmon flux. No corresponding interaction is detectable when the field is applied co-linear with the direction of propagation. The phenomenon is observed as a variation in the far-field intensity of a well-directed beam of optical radiation observed emanating from the surface that is demonstrated to originate from plasmons re-coupling into the adjacent medium (air).
PACS: 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 78.20.Ls – Magnetooptical effects / 42.79.Dj – Gratings
© EDP Sciences, 2004
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