CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Dielectric loaded surface plasmon polariton properties of the Al2O3-Al nanostructure |
Jie Yao(姚洁), Qi Wei(魏琦), Qing-Yu Ma(马青玉), Da-Jian Wu(吴大建) |
Jiangsu Key Laboratory on Opto-Electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China |
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Abstract Surface plasmons (SPs) in ultraviolet (UV) have attracted a great deal of attention because of their emerging applications in energy resources, environmental protection, and biotechnology. In this article, the dielectric loaded surface plasmon polariton (DLSPP) properties of the Al2O3-Al nanostructure are investigated theoretically. Sharp SP responses can be obtained in deep UV by setting an insulator grating on the aluminum film. It is found that the height of the grating element, the lattice parameter, and the filling factor can all modulate the DLSPPs of the Al2O3-Al nanostructure. We further find that this structure is sensitive to the embedding medium and can serve as a refractive index sensor in the UV region. The corresponding sensitivity increases with the decrease of the filling factor. The Al2O3-Al nanostructure may be useful for medical diagnostics and biotechnology in deep UV.
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Received: 03 January 2017
Revised: 09 February 2017
Accepted manuscript online:
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PACS:
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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42.25.Fx
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(Diffraction and scattering)
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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Fund: Project by the National Natural Science Foundation of China (Grant Nos. 11674175, 51120125001, and 11474166), the Major Project of Natural Science Research for Colleges and Universities in Jiangsu Province, China (Grant No. 15KJA140002), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20150562), and the Priority Academic Program Development of Jiangsu Provincial Higher Education Institutions, China. |
Corresponding Authors:
Da-Jian Wu
E-mail: wudajian@njnu.edu.cn
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Cite this article:
Jie Yao(姚洁), Qi Wei(魏琦), Qing-Yu Ma(马青玉), Da-Jian Wu(吴大建) Dielectric loaded surface plasmon polariton properties of the Al2O3-Al nanostructure 2017 Chin. Phys. B 26 057302
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