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Near-Complete Photon Spin Selectivity in a Metasurface of Anisotropic Plasmonic Antennas

Robin Ogier (Institutionen för teknisk fysik, Bionanofotonik) ; Yurui Fang (Institutionen för teknisk fysik, Bionanofotonik) ; Mikael Käll (Institutionen för teknisk fysik, Bionanofotonik) ; Mikael Svedendahl (Institutionen för teknisk fysik, Bionanofotonik)
Physical Review X (2160-3308). Vol. 5 (2015), 4,
[Artikel, refereegranskad vetenskaplig]

Simple chiroptically active metamaterials are difficult to realize in practice but could pave the way for a range of important applications, such as sensitive optical biosensors, asymmetric catalysis, and novel polarization manipulation devices. We show that a metasurface based on a random arrangement of anisotropic but aligned gold nanoparticles can exhibit an almost perfect selectivity towards incident photon spin for evanescent excitation with visible to near-infrared light. The experimentally attained reflection contrast between left- and right-handed circularly polarized light peaks at similar to 90%, in excellent agreement with analytical theory. These results are important for the development of future photonic and plasmonic polarization-based technologies.

Nyckelord: nanophotonic wave-guide, broad-band, colloidal lithography, nanostructures, metamaterials, interference, oligomers, chirality, fields, layers, Physics



Denna post skapades 2015-12-07.
CPL Pubid: 227431

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Bionanofotonik (2007-2015)

Ämnesområden

Fysik
Nanoteknik

Chalmers infrastruktur

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Plasmonics with a Twist: from Single Particles to Metasurfaces