Extraordinary transmission and giant magneto-optical transverse Kerr effect in plasmonic nanostructured films

Belotelov, V. I.; Bykov, Dmitry A.; Doskolovich, Leonid L.; Kalish, A. N.; Zvezdin, A. K.

doi:10.1364/josab.26.001594

Cited by 93 publications

(68 citation statements)

References 23 publications

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“…Furthermore recently, predictions of a significant enhancement of the magneto-optic transverse Kerr effect were reported for the case of a magnetic/noblemetal film perforated with subwavelength slit arrays. 9 In this work, we have successfully fabricated subwavelength hole arrays in optically thin Fe films with different hole sizes. We present a detailed study on the size dependencies of the magnetic and magneto-optic properties.…”

Section: Introductionmentioning

confidence: 99%

Magneto-optic enhancement and magnetic properties in Fe antidot films with hexagonal symmetry

et al. 2010

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The magneto-optic and magnetic properties of hexagonal arrays of holes in optically thin iron films are presented. We analyze their dependence on the hole radius and compare the results to a continuous iron film of the same thickness. We observe a large enhancement of the magneto-optic Kerr rotation with respect to that of the continuous film, at frequencies where surface-plasmon excitations are expected. The spectral position of the Kerr maxima can be tuned by the size and the distance between the holes. Additional simulations are in very good agreement with the experiment and thus confirm the effect of the surface plasmons on the Kerr rotation. The altering of the magnetic properties by the hole array is also visible in the hysteretic behavior of the sample where a significant hardening is observed.

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Section: Introductionmentioning

confidence: 99%

Magneto-optic enhancement and magnetic properties in Fe antidot films with hexagonal symmetry

et al. 2010

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“…3(b)). In the case of a ferromagnetic dielectric film 2,22 or Co layer 5 covered by a thin smooth/or perforated noble metal, a transverse applied field shifts the plasmon related reflectivity (transmission) minimum (maximum) and an enhanced TMOKE appears. A similar behavior is observed here in the Ni film, having a 2D nano-pattern without the support of a noble metal.…”

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Influence of the magnetic field on the plasmonic properties of transparent Ni anti-dot arrays

et al. 2012

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Extraordinary optical transmission is observed due to the excitation of surface plasmon polaritons in 2-dimensional hexagonal anti-dot patterns of pure Ni thin films, grown on sapphire substrates. A strong enhancement of the polar Kerr rotation is recorded at the surface plasmon related transmission maximum. Angular resolved reflectivity measurements under an applied field reveal an enhancement and a shift of the normalized reflectivity difference upon reversal of the magnetic saturation (transverse magneto-optical Kerr effect-TMOKE). The change of the TMOKE signal clearly shows the magnetic field modulation of the dispersion relation of SPPs launched in a 2D patterned ferromagnetic Ni film. Magneto-plasmonics offer unique possibilities to manipulate light by the use of external magnetic fields. [1][2][3][4] The prevailing choice of materials for fabrication of magnetoplasmonic structures has been combined structures of noble and magnetic metals/dielectrics, such as Au and Co/Iron garnet. 1,5,6 The basic idea behind this choice is the combination of the large plasmon activity of noble metals with the magnetic functionality provided by the additional materials. Another reason for the use of noble metals is the excellent resistance to oxidation, which is required to obtain durable patterned thin films. Ni is an interesting candidate in this context as it forms a thin and self-passivating oxide layer (approximately 1 nm). 7,8 Furthermore, the magneto-optical activity of Ni-based nano-patterns can be enhanced by the presence of surface plasmon polaritons (SPPs). [9][10][11][12][13] The magnetic field can provide the means for control of SPPs, as it has been predicted for noble metals, 14 and explored experimentally in hybrid structures. 2,5,6 Early studies on this effect were targeted towards semiconductor-based SPPs (Ref. 15) but not in metallic systems, where high magnetic fields are required. 16 In pure magnetic materials, the need for high fields is not present as the magneto-optical effects are sufficiently strong.In this Letter, we discuss the influence of an external magnetic field on the SPPs for the case of a pure magnetic metal, such as Ni, patterned in two-dimensions (2D) on a transparent substrate. We examine to what extent the ferromagnetic Ni can be used as a host material for SPPs. We show that the magnetic field induces a modulation of the dispersion of SPPs excitation in Ni.A Ni anti-dot sample was prepared on a double side polished Al 2 O 3 ½11 20 substrate. The patterning was accomplished by the use of self-organization of colloidal polystyrene beads as shadow masks. 9 A 30 nm thick Ni film was deposited on the masked sapphire substrate, using electron-beam evaporation. A snapshot of the procedure is illustrated in Fig. 1, where both the shadow mask and the resulting holes are clearly seen. This process resulted in a well defined Ni layer, decorated by holes of a diameter d ¼ 300 nm, spaced on an hexagonal lattice of periodicity of a ¼ 450 nm. The ratio of the radius to pitch size was determined t...

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“…[8][9][10] The magnetic field is another interesting candidate to control SPPs, since it is able to modify their dispersion relation. [11][12][13][14] For a magnetic field B applied along the interface and perpendicular to the SPP propagation direction, the SPP wave vector k sp can be described as…”

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confidence: 99%

“…The modulation term, ⌬k sp ͑B͒, is proportional to the off-diagonal elements of the dielectric tensor ͑ ij , i j͒, which depend on the magnetic field. [11][12][13] In noble ͑diamag-netic͒ metals those elements are small but can be orders of magnitude larger in ferromagnetic metals, where ij depends on the sample magnetization. Since optical absorption in ferromagnetic metals heavily damps surface plasmon propagation, we have developed hybrid magnetoplasmonic multilayer structures consisting of low loss plasmonic noble metal films and magneto-optical ferromagnetic compounds.…”

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confidence: 99%

Enhancement of the magnetic modulation of surface plasmon polaritons in Au/Co/Au films

Martín-Becerra¹,

González-Díaz²,

Temnov³

et al. 2010

Applied Physics Letters

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The deposition of a dielectric overlayer on top of Au/Co/Au multilayer films can significantly enhance the magnetic field induced modulation of the surface plasmon polariton ͑SPP͒ wave vector. This enhancement is analyzed as a function of the thickness of the dielectric overlayer and the associated SPP electromagnetic field confinement and redistribution. The decrease in SPP propagation distance is taken into account by analyzing an adequate figure of merit.

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Extraordinary transmission and giant magneto-optical transverse Kerr effect in plasmonic nanostructured films

Cited by 93 publications

References 23 publications

Magneto-optic enhancement and magnetic properties in Fe antidot films with hexagonal symmetry

Magneto-optic enhancement and magnetic properties in Fe antidot films with hexagonal symmetry

Influence of the magnetic field on the plasmonic properties of transparent Ni anti-dot arrays

Enhancement of the magnetic modulation of surface plasmon polaritons in Au/Co/Au films

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