Research Papers

Subwavelength light focusing of plasmonic lens with dielectric filled nanoslits structures

[+] Author Affiliations
Hao Wang

University of Electronic and Science Technology of China, School of Mechatronics Engineering, Chengdu 611731, Sichuan Province, China

Yongqiang Deng

University of Electronic and Science Technology of China, School of Mechatronics Engineering, Chengdu 611731, Sichuan Province, China

Chinese Academy of Sciences, Institute of Optics and Electronics, State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Chengdu 610209, Sichuan Province, China

Jiayu He, Ping Gao, Na Yao, Changtao Wang, Zeyu Zhao, Jiong Wang, Xiangang Luo

Chinese Academy of Sciences, Institute of Optics and Electronics, State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Chengdu 610209, Sichuan Province, China

Bo Jiang

No. 33 Research Institute of China, Electronics Technology Group Corporation, Taiyuan, Shanxi 030006, China

J. Nanophoton. 8(1), 083079 (Jul 18, 2014). doi:10.1117/1.JNP.8.083079
History: Received March 21, 2014; Revised May 21, 2014; Accepted May 23, 2014
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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.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Hao Wang ; Yongqiang Deng ; Jiayu He ; Ping Gao ; Na Yao, et al.
"Subwavelength light focusing of plasmonic lens with dielectric filled nanoslits structures", J. Nanophoton. 8(1), 083079 (Jul 18, 2014). ; http://dx.doi.org/10.1117/1.JNP.8.083079


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