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Current graphene‐based plasmonic devices are restricted to 2D patterns defined on planar substrates; thus, they suffer from spatially limited 2D plasmon fields. Here, 3D graphene forming freestanding nanocylinders realized by a plasma‐triggered self‐assembly process are introduced. The graphene‐based nanocylinders induce hybridized edge (in‐plane) and radial (out‐of‐plane) coupled 3D plasmon modes...
In article number 2100079, Jeong‐Hyun Cho and co‐workers report hybridized 3D plasmon modes stemming from 3D graphene nanostructures, resulting in non‐surface‐limited (volumetric) field enhancements and a four orders of magnitude stronger field at the openings of cylinders than in rectangular 2D graphene ribbons.
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