| Tuning the focusing spot of plasmonic nanolens by aspect ratio under linear polarization |
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| 作者姓名： | Shuiyan Cao Weixing Yu Cheng Wang Yongqi Fu |
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| 基金项目： | supported by the National Natural Science Foundation of China(Nos.90923036,60977041,60877021,and 61077010);the 100 Talents Program of Chinese Academy of Sciences,and the Ministry of Science and Technology of China(No.2010DFR10660) |
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| 摘 要： | A new plasmonic nanolens that can be tuned by varying the circular structure into an elliptical annulus and the aspect ratio from 1 to 0.1 and 1 to 2,respectively,is proposed.Using the rigorous finite-difference and time-domain algorithm,we find that when the aspect ratio ranges from 1 to 0.1,a good linear relationship exists between the aspect ratio and focusing spot size at the full-width at half-maximum in the x- and y-directions,respectively.The corresponding calculated FWHM ranges from 96×126(nm) to 15×52(nm)(Full Width at Half Maximum).
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| 关 键 词： | 纵横比 聚焦点 线性极化 调整 电浆 等离激元 环形结构 时域算法 |
| 收稿时间： | 2013/9/21 |
Tuning the focusing spot of plasmonic nanolens by aspect ratio under linear polarization |
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| Shuiyan Cao,Weixing Yu,Cheng Wang,Yongqi Fu.Tuning the focusing spot of plasmonic nanolens by aspect ratio under linear polarization[J].中国光学快报(英文版),2014,12(1):12401-65. |
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| Institution: | [1]State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China [2]University of Chinese Academy of Sciences, Beijing 10049, China [3]School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| Abstract: | |
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| Keywords: | 240 6680 310 6628 000 4430 350 5730 |
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