1 February 2017 Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles
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Abstract
A Yagi-Uda-like optical nanoantenna consisting of metallo-dielectric core–shell nanoparticles has been proposed, and its major characteristics have been investigated theoretically and numerically. Compared with all-dielectric nanoantennas and plasmonic nanoantennas, the proposed nanoantenna may exhibit better directivity and Purcell factor. In addition, the antenna shows high radiation efficiency over 65% for broadband operation as well. This core–shell nanoantenna, allowing a more compact design, may find potential applications in nanoscale lasers, photovoltaic, and energy-harvesting devices.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhenya Meng, Zhenya Meng, Hailin Cao, Hailin Cao, Di Zhou, Di Zhou, Zhoujian Chen, Zhoujian Chen, Chengzhuo Zhu, Chengzhuo Zhu, Shiyong Chen, Shiyong Chen, Xiaoheng Tan, Xiaoheng Tan, Yongliang Zhang, Yongliang Zhang, } "Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles," Journal of Nanophotonics 11(1), 016005 (1 February 2017). https://doi.org/10.1117/1.JNP.11.016005 . Submission: Received: 27 September 2016; Accepted: 12 January 2017
Received: 27 September 2016; Accepted: 12 January 2017; Published: 1 February 2017
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