SKM 2023 – scientific programme
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MA: Fachverband Magnetismus
MA 47: Skyrmions IV
MA 47.11: Talk
Friday, March 31, 2023, 12:15–12:30, HSZ 04
Artificial surface conductivity on metallic metamaterials and its effect on localized plasmon skyrmions — •Amin Khavasi1 and Karin Everschor-Sitte1,2 — 1Faculty of Physics, University of Duisburg-Essen, 47057 Duisburg, Germany — 2Center for Nanointegration Duisburg-Essen (CENIDE), Duisburg, Germany
Metallic metamaterials have been widely investigated for realizing different peculiar effects such as spoof surface plasmons [1] and extraordinary transmission of light [2]. Recently, topologically robust localized plasmonic skyrmions have been realized by spiral metallic meta-structures [3, 4].
For metal films with a periodic arrangement of cut-through slits, Khavasi and others have shown that the structure can be modeled by an anisotropic medium with an artificial surface conductivity [5]. In the subwavelength regime, the surface conductivity is imaginary considering lossless systems representing non-specular higher diffracted orders. We investigate the consequences of such artificial surface conductivities for the skyrmionic modes of the spiral meta-structures to obtain more insight on the behavior of the localized plasmonic skyrmions.
References:
[1] Pendry, J. B., et al., science 305, (2004): 847-848.
[2] Porto, J. A., et al., Physical review letters 83,(1999): 2845.
[3] Davis, T. J., et al. Science 368, (2020): eaba6415.
[4] Deng, Z., et al., Nature Communications 13, (2022): 1-7.
[5] Edalatipour, M., et al., Journal of lightwave technology 30, (2012): 1789-1794.