Figure 3.


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(a) RF microstrip patch antenna [7], (b) nanopatch antenna built by a gold film coupled to a silver nanocube. The maximum field enhancement is confined at the nanogap of this configuration [28], (c) radiation pattern of the RF microstrip patch antenna shown in (a) [7], (d) simulated (black) and measured (red) radiation patterns of the optical nanopatch antenna shown in (b) [28].

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