Nanoplasmonic surfaces enabling strong surface-normal electric field enhancement
2013; Optica Publishing Group; Volume: 21; Issue: 20 Linguagem: Inglês
10.1364/oe.21.023097
ISSN1094-4087
AutoresKıvanç Güngör, Emre Ünal, Hilmi Volkan Demir,
Tópico(s)Metamaterials and Metasurfaces Applications
ResumoConventional two-dimensional (2D) plasmonic arrays provide electric field intensity enhancement in the plane, typically with a surface coverage around 50% in the plan-view. Here, we show nanoplasmonic three-dimensional (3D) surfaces with 100% surface coverage enabling strong surface-normal field enhancement. Experimental measurements are found to agree well with the full electromagnetic solution. Along with the surface-normal localization when using the plasmonic 3D-surface, observed maximum field enhancement is 7.2-fold stronger in the 3D-surface than that of the 2D counterpart structure. 3D-plasmonic nonplanar surfaces provide the ability to generate volumetric field enhancement, possibly useful for enhanced plasmonic coupling and interactions.
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