Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Plasmonics and Nanooptics VI
O 66.2: Vortrag
Donnerstag, 17. März 2011, 11:30–11:45, WIL A317
Extraordinary Kerr effect in the transmission through ferromagnetic-plasmonic hybrid nanostructures — •M Pohl1, V Belotelov2, I Akimov1,3, V Kotov2,4, S Kasture5, A Vengurlekar5, A Gopal5, D Yakovlev3, A Zvezdin2, and M Bayer1 — 1Experimentelle Physik E2, TU Dortmund, Germany — 2A.M. Prokhorov General Physics Institute, Moscow, Russia — 3A.F. Ioffe Physical-Technical Institute, St. Petersburg, Russia — 4V.A. Kotelnikov Institute of Radio Engineering and Electronics, Moscow, Russia — 5Tata Institute of Fundamental Research, Mumbai, India
The transverse magneto-optical Kerr effect (TMOKE) has been studied on a new magneto-optical heterostructure. The sample, consisting of a periodically nanostructured gold film on top of a ferromagnetic dielectric bismuth-iron-garnet film, allows the measurement of the TMOKE in transmission geometry via extraordinary optical transmission (EOT). It is shown that the effect is enhanced by up to three orders of magnitude exclusively near surface plasmon polariton resonances. The TMOKE signal is highly sensitive to the angle of light incidence, its polarization and the applied magnetic field strengths. Moreover, it changes sign for SPPs traveling in opposite directions. Thus, TMOKE can become an important tool for the complete characterization of plasmonic nanostructures. Additionally, the effect can be controlled by fields on the order of 100 Oe, which is very promising for ultra high sensitive devices and optical data processing.