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Journal of Nanophotonics

Subwavelength light focusing of plasmonic lens with dielectric filled nanoslits structures
Author(s): Hao Wang; Yongqiang Deng; Jiayu He; Ping Gao; Na Yao; Changtao Wang; Zeyu Zhao; Jiong Wang; Bo Jiang; Xiangang Luo
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Paper Abstract

A plasmonic lens composed of a dielectric-filled nanoslits structure on an aluminum film is proposed and experimentally demonstrated. The slits’ structure is designed with equal distance, length, and width, but filled with variant thickness SiO2 dielectric for specific phase retardations. A dual focused ion beam instrument is employed to mill the slits and deposit SiO2 into the slits. The phase modulation by SiO2-filled slits is illustrated by a double slits interference experiment. The light focusing behavior of the fabricated plasmonic lens is experimentally characterized by a scanning near-field optical microscope. Experimental results show good agreement with the simulations.

Paper Details

Date Published: 18 July 2014
PDF: 8 pages
J. Nanophoton. 8(1) 083079 doi: 10.1117/1.JNP.8.083079
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
Hao Wang, Univ. of Electronic Science and Technology of China (China)
Yongqiang Deng, Univ. of Electronic Science and Technology of China (China)
Jiayu He, Institute of Optics and Electronics (China)
Ping Gao, Institute of Optics and Electronics (China)
Na Yao, Institute of Optics and Electronics (China)
Changtao Wang, Institute of Optics and Electronics (China)
Zeyu Zhao, Institute of Optics and Electronics (China)
Jiong Wang, Institute of Optics and Electronics (China)
Bo Jiang, No. 33 Research Institute of China (China)
Xiangang Luo, Institute of Optics and Electronics (China)


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