Funnel-Shaped Arrays of Metal Nano-Cylinders for Nano-Focusing
ZHOU Xiu-Li1, FU Yong-Qi2, WANG Shi-Yong1, PENG An-Jin1, CAI Zhong-Heng1
1School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 6100542State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209
Funnel-Shaped Arrays of Metal Nano-Cylinders for Nano-Focusing
ZHOU Xiu-Li1, FU Yong-Qi2, WANG Shi-Yong1, PENG An-Jin1, CAI Zhong-Heng1
1School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 6100542State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209
摘要We analyse funnel-shaped arrays of metal nanocylinders that can be potentially used as waveguides for nano-focusing of light. The proposed structures consist of Ag nanocylinders with gradually changed radii and discrete spacing arranged like side-view funnels with different angles. Finite-difference and time-domain simulations demonstrate that the proposed structures with different spacings and funnel angles have versatile light propagation characteristics. These structures can focus the incident Gaussian light beam (200nm at its full width at half maximum) into beam sizes of 10nm, 15nm, and 20nm, respectively, which corresponds to the transmission efficiencies of 38%, 40%, and 80%.
Abstract：We analyse funnel-shaped arrays of metal nanocylinders that can be potentially used as waveguides for nano-focusing of light. The proposed structures consist of Ag nanocylinders with gradually changed radii and discrete spacing arranged like side-view funnels with different angles. Finite-difference and time-domain simulations demonstrate that the proposed structures with different spacings and funnel angles have versatile light propagation characteristics. These structures can focus the incident Gaussian light beam (200nm at its full width at half maximum) into beam sizes of 10nm, 15nm, and 20nm, respectively, which corresponds to the transmission efficiencies of 38%, 40%, and 80%.
ZHOU Xiu-Li;FU Yong-Qi;WANG Shi-Yong;PENG An-Jin;CAI Zhong-Heng. Funnel-Shaped Arrays of Metal Nano-Cylinders for Nano-Focusing[J]. 中国物理快报, 2008, 25(9): 3296-3299.
ZHOU Xiu-Li, FU Yong-Qi, WANG Shi-Yong, PENG An-Jin, CAI Zhong-Heng. Funnel-Shaped Arrays of Metal Nano-Cylinders for Nano-Focusing. Chin. Phys. Lett., 2008, 25(9): 3296-3299.
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2008, Vol. 25 
