Abstract
Metallic nanostructures with a distinct shape and arrangement exhibit particular optical properties and have potential for a variety of applications in imaging, lithography, and optoelectronic devices. In many cases, the surface plasmon polaritons (SPPs) or its localized excitations on bounded metallic surfaces play important roles for the field enhancements and the transfers of near field light. The plasmonic responses in metallic rods, pillars or rings are also extensively investigated to realize the negative-index metamaterials. As an interesting example of this 'Plasmonics', we have proposed a subwavelength imaging scheme for near field in which a metallic nanorod array is used as a plasmonic image-transfer device. The image resolution of several tens nm was found to be obtained for dipole sources placed near the entrance surfaces.
