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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Rep Prog Phys. 2012 Feb 13;75(3):036501. doi: 10.1088/0034-4885/75/3/036501

Figure 1.

Figure 1

Various metallic nanostructures. (a) Periodic nanohole arrays, period 600 nm, in a metallic film exhibit extraordinary optical transmission effects (Ebbesen et al., 1998). Picture used with permission, Elsevier Publishing, from (Krishnan et al.) (b) Metallic bull’s eye structure for channeling light from the concentric rings into the central, subwavelength aperture. The groove periodicity is 500 nm. From (Lezec et al., 2002) Reprinted with permission from AAAS. (c) Silver grating structure with 500 nm periodicity. (d) A sharp metallic tip can concentrate light below the diffraction limit. Image courtesy Lukas Novotny. Used with permission (www.nano-optics.org). (e) Metal-insulator-metal nanogap plasmon cavity. Scale bar 500 nm. Inset: the 3.3 nm insulating layer. Scale bar 20 nm. Reprinted figure with permission from (Miyazaki and Kurokawa, 2006). Copyright 2006 by the American Physical Society.