期刊
OPTICAL MATERIALS EXPRESS
卷 7, 期 2, 页码 569-576出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.7.000569
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资金
- National Natural Science Foundation of China [11674167, 11621091]
- Innovation Project of Guangxi Graduate Education [YCSZ2016035]
- Guangxi Scientific Research and Technological Development Program Topics [1598007-12]
- Youth Foundation of Guangxi Normal University [17A4]
- Dengfeng Project B of Nanjing University
We design and numerically investigate a graphene-based asymmetric nanoantenna microstructure that can be used to realize electrically controllable, unidirectionally propagating broadband surface plasmon polaritons. The device geometry facilitates the simultaneous excitation of two localized surface plasmons resonances in the whole structure, and consequently, the asymmetric nanoantenna can be considered as being composed of two oscillating magnetic dipoles, wherein the interference of the radiated electromagnetic waves leads to a unidirectional propagation effect. Our results indicate that our proposed active device is promising for realizing compactable, tunable, terahertz plasmonic light sources. (C) 2017 Optical Society of America
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