In this paper, we investigate surface plasmon-polariton propagation at the interface of metal and magnetooptic dielectric semiinfinite layers where both layers are magnetized. Using magnetic group theory, we calculate scattering matrices for the waveguide sections with three orientations of dc magnetic field. Solving analytically the wave equation for the Voigt configuration, we obtain exact dispersion relation for this waveguide. Numerical examples show that the nonreciprocal phase shift between forward and backward waves can be increased significantly as compared with the case where only the magnetooptic dielectric layer is magnetized.
2. Sepulveda, B., L. M. Lechuga, and G. Armelles, "Magnetooptic effects in surface-plasmon-polaritons slab waveguides," Journal of Lightwave Technology, Vol. 24, 945-955, 2006.
doi:10.1109/JLT.2005.861943
3. Pistora, J., et al., "Surface plasmon resonance sensor with a magneto-optical structure," Optica Applicata, Vol. 40, No. 4, 883-895, 2010.
4. Barybin, A. A. and V. A. Dmitriev, Modern Electrodynamics and Coupled-mode Theory: Application to Guided-wave Optics, Chapter 2, Rinton Press, Princeton, New Jersey, 2002.
5. Johnson, P. B. and R. W. Christy, "Optical constants of the noble metals," Physical Review B, Vol. 22, 1099-1119, 1983.
6. Yang, K., et al., "Surface-plasmon resonance and magneto-optical enhancement on Au-Co nanocomposite thin films," Journal of Applied Physics, Vol. 107, 103924, 2010.
doi:10.1063/1.3428470
7. Temnov, V. V., et al., "Active magneto-plasmonics in hybrid metalferromagnet structures," Nature Photonics, Vol. 4, 107-111, 2010.
doi:10.1038/nphoton.2009.265
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