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Optical Spin Waves
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DOI：10.1021/acs.nanolett.4c01346.png)
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Chirality is inherent to a broad range of systems, including solid-state and wave physics. The precession (chiral motion) of the magnetic moments in magnetic materials, forming spin waves, has various properties and many applications in magnetism and spintronics. We show that an optical analogue of spin waves can be generated in arrays of plasmonic nanohelices. Such optical waves arise from the interaction between twisted helix eigenmodes carrying spin and orbital angular momenta. We demonstrate that these optical spin waves are reflected at the interface between successive domains of enantiomeric nanohelices, forming a heterochiral lattice regardless of the wave propagation direction within the lattice. Optical spin waves may be applied in techniques involving photon spin, ranging from data processing and storage to quantum optics.
Keyword:
surface plasmons
chirality
angular momentum
metamaterials
helix array
期刊
IF:
9.1
论文数:
2.7W
被引数:
16.5W
机构
引用论文
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