Magnetic field modulation of intense surface plasmon polaritons.

We present correlated experimental and theoretical studies on the magnetic field modulation of Surface Plasmon Polaritons (SPPs) in Au/Co/Au trilayers. The trilayers were grown by sputter deposition on glass slides with the Co films placed at different distances from the surface and with different thickness. We show that it is possible to tailor Au/Co/Au trilayers with the critical thickness needed for optimum excitation of SPPs leading to large localized electromagnetic fields. The modification of the SPP wave vector by externally applied magnetic fields was investigated by measuring the magneto-optical activity in transverse configuration. In addition, using magneto-optics as a tool we determined the spatial distribution of the SPP generated electromagnetic fields within Au/Co/Au samples by analyzing the field-dependent optical response, demonstrating that it is possible to excite SPPs that exhibit large electromagnetic fields that are also magneto-optically active and therefore can be modulated by externally applied magnetic fields.

[1]  P. Bertrand,et al.  General analytical treatment of optics in layered structures: Application to magneto-optics , 2001 .

[2]  S. E. Irvine,et al.  A gigahertz surface magneto-plasmon optical modulator , 2004, IEEE Journal of Quantum Electronics.

[3]  L M Lechuga,et al.  Highly sensitive detection of biomolecules with the magneto-optic surface-plasmon-resonance sensor. , 2006, Optics letters.

[4]  Samant,et al.  Microscopic origin of magnetic anisotropy in Au/Co/Au probed with x-ray magnetic circular dichroism. , 1995, Physical review letters.

[5]  Sungkyun Park,et al.  Tunable magnetic anisotropy of ultrathin Co layers , 2005 .

[6]  Günter Gauglitz,et al.  Surface plasmon resonance sensors: review , 1999 .

[7]  Marlière,et al.  Magneto-optical Effects Enhanced by Surface Plasmons in Metallic Multilayer Films. , 1994, Physical review letters.

[8]  Jacques Peretti,et al.  Surface-enhanced magneto-optics in metallic multilayer films , 2001 .

[9]  R. Lukaszew,et al.  Optimizing the planar structure of (1 1 1) Au/Co/Au trilayers , 2007 .

[10]  Nicolas Bonod,et al.  Optimization of surface-plasmon-enhanced magneto-optical effects , 2004 .

[11]  J. J. Burke,et al.  Surface-polaritonlike waves guided by thin, lossy metal films. , 1983, Optics letters.

[12]  Kushwaha,et al.  Magnetoplasmons in thin films in the Voigt configuration. , 1987, Physical review. B, Condensed matter.

[13]  H. Raether.  Surface Plasmons on Smooth and Rough Surfaces and on Gratings , 1988 .

[14]  R. F. Wallis,et al.  Surface magnetoplasma waves in nickel , 1977 .

[15]  E. Palik.  Handbook of Optical Constants of Solids , 1997 .

[16]  R. F. Wallis,et al.  Enhancement of the transverse Kerr magneto-optic effect by surface magnetoplasma waves , 1977 .

[17]  Mark L. Brongersma,et al.  Leaky and bound modes of surface plasmon waveguides , 2005 .

[18]  S. Yuasa,et al.  Direct determination of interfacial magnetic moments with a magnetic phase transition in Co nanoclusters on Au(111). , 2001, Physical review letters.

[19]  M. Schubert,et al.  Explicit solutions for the optical properties of arbitrary magneto-optic materials in generalized ellipsometry. , 1999, Applied optics.

[20]  Y. Lan,et al.  Manipulation of Tunneling Frequencies Using Magnetic Fields for Resonant Tunneling Effects of Surface Plasmons , 2007 .

[21]  J. Khurgin.  Optical isolating action in surface plasmon polaritons , 2006 .

[22]  G. Wurtz,et al.  Controlling optical transmission through magneto-plasmonic crystals with an external magnetic field , 2008 .

[23]  Burke,et al.  Surface-polariton-like waves guided by thin, lossy metal films. , 1986, Physical review. B, Condensed matter.

[24]  Schubert,et al.  Polarization-dependent optical parameters of arbitrarily anisotropic homogeneous layered systems. , 1996, Physical review. B, Condensed matter.

[25]  D. Sarid,et al.  Long-range surface magnetoplasmons in thin nickel films. , 1987, Optics letters.

[26]  Yakov M. Strelniker,et al.  Optical transmission through metal films with a subwavelength hole array in the presence of a magnetic field , 1999 .

[27]  S. Bozhevolnyi,et al.  Surface plasmon polariton based modulators and switches operating at telecom wavelengths , 2004 .

[28]  R. Clarke,et al.  Surface-magnetoplasmon nonreciprocity effects in noble-metal/ferromagnetic heterostructures , 2007 .

[29]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.