Experimental demonstration of anomalous nonreciprocal optical response of 1D periodic magnetoplasmonic nanostructures

L. Halagacka (1, 2) , Mathias Vanwolleghem (3) , Francois Vaurette (3) , Jamal Ben Youssef (4) , Philippe Gogol (2, 5) , N. Yam (2, 5) , K. Postava (1) , B. Dagens (2, 5) , J. Pistora (1)

1 Department of Physics and Nanotechnology Center
2 IEF
3 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
4 LMB - Laboratoire de magnétisme de Bretagne
5 IEF - Institut d'électronique fondamentale

In this paper we analyze the optical and transversal magnetooptical (MO) response of magnetoplasmonic (MP) nanostructures. The MP structure is a 1D periodic gold grating fabricated by lift-off technique on the MO dielectric substrate (Bi-substituted yttrium iron garnet BixY3−xFe5O12). Following our recent theoretical work (Opt. Express 21, pp. 2174121755, Sep 2013.), we confirm here experimentally the predicted dependence of the MO response on the geometry of the grating, that is directly attributed to the anticrossing behavior of the Fabry-Perot (FP) resonance in the grating's slits and the surface plasmon resonances (SPPs) at its interfaces. The experimental results were achieved by Mueller matrix spectroscopic ellipsometry. Observed fine tuning of the transverse magneto-optic Kerr opens up new possibilities for the design of compact nonreciprocal devices.

Mots clés: plasmonics; magnetooptics; magnetoplasmonics; surface plasmon; gratings

Domaines: Sciences de l'ingénieur [physics]

L. Halagacka, Mathias Vanwolleghem, Francois Vaurette, Jamal Ben Youssef, Philippe Gogol, et al.. Experimental demonstration of anomalous nonreciprocal optical response of 1D periodic magnetoplasmonic nanostructures. SPIE Photonics West, OPTO 2014, Conference 8988 - Integrated Optics : Devices, Materials, and Technologies XVIII, 2014, San Francisco, CA, United States. 89880E, 6 p., ⟨10.1117/12.2039450⟩. ⟨hal-00962382⟩