Influence of V-Shaped Metallic Subwavelength Slits with Variant Periods for Superfocusing |
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Authors: | Yu Liu Yongqi Fu Xiuli Zhou |
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Affiliation: | (1) School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan Province, People’s Republic of China;(2) State Key Laboratory of Optical Technology on Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, People’s Republic of China; |
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Abstract: | In this paper, we discussed the influence of a plasmonic lens with V-shaped metallic subwavelength slits and variant periods on transmission properties. In order to analyze the influence, a finite-difference time-domain numerical algorithm was adopted for computational numerical simulation of the plasmonic structures. The structures are flanked with the penetrated slits through a metal (Ag) film which is coated on a quartz substrate. Our simulation results demonstrated that different cone angles originated from the V-shaped slits generate different influences on the beam propagation. The width variation affects the intensity significantly. The cone angles formed by the V-shaped slits can change the focusing performance. These results are very encouraging for future study of the plasmonic lens-based applications. |
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