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Chin. Opt. Lett.
 Home  List of Issues    Issue 05 , Vol. 16 , 2018    10.3788/COL201816.052501


Polarization and structure dependent optical characteristics of the three-arm nanoantenna with C3v symmetry and broken symmetry
Mian Wang1, Cheng Yin2, Youqiao Ma3, Jun Zhou1, Hanhua Zhong1, and Xianfeng Chen2
1 Institute of Photonics, Faculty of Science, [Ningbo University], Ningbo 31 521 1 , China
2 Department of Physics and Astronomy, [Shanghai Jiao Tong University], Shanghai 2 002 40, China
3 Department of Electrical and Computer Engineering, [Dalhousie University], Halifax, NS B3 J 2X4, Canada

Chin. Opt. Lett., 2018, 16(05): pp.052501

DOI:10.3788/COL201816.052501
Topic:Optoelectronics
Keywords(OCIS Code): 260.5430  290.2200  250.5403  

Abstract
The optical properties of a three-arm plasmonic nanoantenna with and without broken symmetry were analyzed in detail. For the symmetrical structure, the local electric field can be significantly enhanced and well confined within the feed gap, whilst the extinction spectrum illustrates polarization independence. With broken symmetry, multi-wavelength resonances are observed due to the single dipole resonance and dipole–dipole coupling effect, and wide tunability is also available through minor structural adjustment. Especially when illuminated by a circularly polarized light beam, the extinction and the electric field distribution can be effectively modulated by just varying the incident wavelength.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2018/1/3
Accepted:2018/3/1
Posted online:2018/4/20

Get Citation: Mian Wang, Cheng Yin, Youqiao Ma, Jun Zhou, Hanhua Zhong, and Xianfeng Chen, "Polarization and structure dependent optical characteristics of the three-arm nanoantenna with C3v symmetry and broken symmetry," Chin. Opt. Lett. 16(05), 052501(2018)

Note: This work was supported by the National Natural Science Foundation of China (Grant Nos. 61320106014, 61405117, and 61675104) and the K. C. Wong Magna Fund in Ningbo University, China.



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