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| Optimization Design Method for Electromagnetic Focusing Micro-structured Metallic-film Multi-annular Plates |
| LIU Tao,YANG Shu-ming,JIANG Zhuang-de |
| State Key Laboratory for Manufacturing System Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China |
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Abstract Micro-structured metallic-film multi-annular plate (MAP) is one kind of novel micro-/nanophotonic element, which can be applied in the fields of super-resolution optical focusing, nanoscopic imaging, and precision engineering measurement. A versatile, fast, vectorial optimization design method for MAP is described for modulating far-field super-resolution focusing spots and ultra-thin optical needles. It is applicable for a variety of vector beams such as linearly, circularly, and radially polarized beams. Rigorous electromagnetic validation method for MAP is established based on the three-dimensional finite-difference time-domain method, which accurately models the scattering process of light propagating within micro-structured metallic annular grooves. For light wavelengths ranging from deep ultra-violet to visible, an empirical selection rule of the metallic coating film for MAP is the aluminum film at a thickness within λ/10～λ/6.
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Received: 10 March 2016
Published: 31 May 2016
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| Fund:Research on GPS information ontology interoperability Methods |
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Corresponding Authors:
Shu-ming YANG
E-mail: shuming.yang@xjtu.edu.cn
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2016, Vol. 37 
