Demonstration of a Plasmonic Dimple Lens for Nanoscale Focusing of Light

Details Demonstration of a Plasmonic Dimple Lens for Nanoscale Focusing of Light Demonstration of a Plasmonic Dimple Lens for Nanoscale Focusing of Light

2008-10-09

arxiv.org/abs/0810.1553v2

Physics

Optics

5 pages, 7 figures

Scientific paper

Focusing electromagnetic energy to sub-wavelength dimensions has become an increasingly active field of research for a variety of applications such as Heat Assisted Magnetic Recording (HAMR), nanolithography, and nanoscale optical characterization of biological cells and single molecules using near-field scanning optical microscopy (NSOM) technique. Double-sided surface plasmons in a metal-insulator-metal (MIM) geometry have been shown to have very small wavelengths for dielectric of thickness of less than 10 nm. A tapered dielectric structure sandwiched between metal, can be used to efficiently couple electromagnetic energy from free space photons to the plasmonic wavelengths at the nanoscale. In this paper, we present the fabrication and characterization of a novel MIM plasmonic lens structure.

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