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원자제어 저차원 전자계 연구단
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Directional radiation of Babinet-inverted optical nanoantenna integrated with plasmonic waveguide

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Title
Directional radiation of Babinet-inverted optical nanoantenna integrated with plasmonic waveguide
Author(s)
Kim J.; Roh Y.-G.; Sangmo Cheon; Jeong Kim U.; Hwang S.W.; Park Y.; Lee C.-W.
Publication Date
2015-07
Journal
SCIENTIFIC REPORTS, v.5, no., pp.11832 -
Publisher
NATURE PUBLISHING GROUP
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 viaa in plasmonic nanocircuits
URI
http://pr.ibs.re.kr/handle/8788114/1969
DOI
10.1038/srep11832
ISSN
2045-2322
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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