We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Directional radiation of Babinet-inverted optical nanoantenna integrated with plasmonic waveguide.
- Authors
Kim, Jineun; Roh, Young-Geun; Cheon, Sangmo; Jeong Kim, Un; Hwang, Sung Woo; Park, Yeonsang; Lee, Chang-Won
- Abstract
We present a Babinet-inverted optical nanoantenna integrated with a plasmonic waveguide. Using an integrated nanoantenna, we can couple the plasmon guide mode in a metal-insulator-metal (MIM) structure into the resonant antenna feed directly. The resonantly excited feed slot then radiates to free space and generates a magnetic dipole-like far-field pattern. The coupling efficiency of the integrated nanoantenna is calculated as being approximately 19% using a three-dimensional finite-difference time-domain (3D FDTD) simulation. By adding an auxiliary groove structure along with the feed, the radiation direction can be controlled similar to an optical Yagi-Uda antenna. We also determine, both theoretically and experimentally, that groove depth plays a significant role to function groove structure as a reflector or a director. The demonstrated Babinet-inverted optical nanoantenna integrated with a plasmonic waveguide can be used as a 'plasmonic via' in plasmonic nanocircuits.
- Subjects
OPTICAL antennas; WAVEGUIDES; PLASMONS (Physics); MAGNETIC dipoles; MAGNETISM
- Publication
Scientific Reports, 2015, p11832
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep11832