Europhys. Lett.
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
Europhys. Lett., 68 (5), pp. 692-698 (2004)
DOI: 10.1209/epl/i2004-10262-x

Plasmon transport phenomena on a continuous ferromagnetic surface

D. M. Newman1, M. L. Wears1 and R. J. Matelon2

1  School of Engineering and Computer Science, University of Exeter Exeter, EX4 4QF, UK
2  Facultad de Física, Pontificia Universidad Católica de Chile - Santiago, Chile

received 1 July 2004; accepted in final form 12 October 2004
published online 5 November 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).

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