Directional radiation of Babinet-inverted optical nanoantenna integrated with plasmonic waveguide
- Title
- Directional radiation of Babinet-inverted optical nanoantenna integrated with plasmonic waveguide
- Author
- 천상모
- Keywords
- YAGI-UDA ANTENNA; NANOCIRCUITS; LIGHT
- Issue Date
- 2015-07
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v. 5
- 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.
- URI
- http://www.nature.com/articles/srep11832http://hdl.handle.net/20.500.11754/26458
- ISSN
- 2045-2322
- DOI
- 10.1038/srep11832
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
- Files in This Item:
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