Extraordinary transmission from high-gain nanoaperture antennas
Date of this Version5-2010
Appl. Phys. Lett. 96, 211116 (2010)
This document has been peer-reviewed.
This letter describes a bowtie nanoaperture antenna for coupling light to a subdiffraction limited near-field spot (<λ/8). The gain of the antenna is increased using a concentric grating structure to coherently diffract normally incident light toward the aperture. We experimentally demonstrate that the addition of the grating structure enhances the far-field transmission through the aperture by 6.9 times while the intensity at the near-field is increased more than 15 times. The nanoantenna is useful for applications including nanolithography and data storage.
Engineering | Nanoscience and Nanotechnology