Translation of nanoantenna hot spots by a metal-dielectric composite superlens

Zhengtong Liu; Thoreson, Mark D.; Kildishev, Alexander V.; Shalaev, Vladimir M.
July 2009
Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p033114
Academic Journal
We employ numerical simulations to show that highly localized, enhanced electromagnetic fields, also known as “hot spots,” produced by a periodic array of silver nanoantennas can be spatially translated to the other side of a metal-dielectric composite superlens. The proposed translation of the hot spots enables surface-enhanced optical spectroscopy without the undesirable contact of molecules with metal, and thus it broadens and reinforces the potential applications of sensing based on field-enhanced fluorescence and surface-enhanced Raman scattering.


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