Surface plasmons and magneto-optic activity in hexagonal Ni anti-dot arrays

Papaioannou, Evangelos Th.; Kapaklis, Vassilios; Melander, Emil; Hjörvarsson, Bjørgvin; Pappas, S. D.; Patoka, Piotr; Giersig, Michael; Fumagalli, P.; García‐Martín, Antonio; Ctistis, Georgios

doi:10.1364/oe.19.023867

Cited by 57 publications

(30 citation statements)

References 30 publications

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“…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.…”

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confidence: 98%

“…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.…”

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confidence: 99%

“…Angular dependent zero-order reflectivity curves (h À 2h) were obtained using a dedicated optical diffractometer (HUBER MC 9300), with a step resolution of 1/1000 and a laser wavelength of k ¼ 660 nm. 9 A magnetic field up to 42 mT can be applied, using a quadrupole air core coil magnet, which is mounted on the sample rotation stage of the goniometer. Fig.…”

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confidence: 99%

“…3,4,9 The first peak in transmission records an intensity of $ 36% (after substrate corrections). Although it is expected the plasmon losses in Ni to be large, we have a clear indication of a strong SPP resonance.…”

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confidence: 99%

“…9 In Fig. 3(a) (left y-axis), we present angular reflectivity measurements at a wavelength of k ¼ 660 nm for p-polarized light.…”

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

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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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“…9 In Fig. 3(a) (left y-axis), we present angular reflectivity measurements at a wavelength of k ¼ 660 nm for p-polarized light.…”

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confidence: 99%

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

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Magnetoplasmonics: Combining Magnetic and Plasmonic Functionalities

Armelles¹,

Cebollada²,

García‐Martín³

et al. 2013

Advanced Optical Materials

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Magneto-Optical (MO) Characterization Tools for Chemically Prepared Magnetic Nanomaterials

Pineider

Sangregorio

2016

Magnetic Characterization Techniques for Nanomaterials

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Surface plasmons and magneto-optic activity in hexagonal Ni anti-dot arrays

Cited by 57 publications

References 30 publications

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

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

Magnetoplasmonics: Combining Magnetic and Plasmonic Functionalities

Magneto-Optical (MO) Characterization Tools for Chemically Prepared Magnetic Nanomaterials

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