| Subwavelength Imaging in a One-Dimensional Metal-Dielectric Structure |
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| 作者姓名： | 李明宇 顾培夫 张锦龙 厉以宇 刘旭 |
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| 作者单位： | State Key Laboratory for Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027 |
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| 基金项目： | Supported by the Postdoctoral Science Foundation of China under Grant No 20070411174, and the National Nature Science Foundation of China under Grant Nos 60478038 and 60608014. |
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| 摘 要： | We analyse the dispersion relation of a one-dimensional （1D） metal-dielectric （MD） structure for H-polarized light （i.e. the magnetic field is parallel to the interfaces of the layers） and use the transfer matrix method to simulate the subwavelength image effect through the 1D-MD structure. The structure operates in the self-collimation regime, and does not involve negative refraction or amplification of evanescent waves. The Fabry-Perot resonance effect is studied in order to obtain optimum parameters for maximum transmission. A resolution of ）λ/10 for a single point source is achieved when the thickness of the 1D-MD is about 300 nm. Taking into account the actual values of the dielectric constants of the metal （silver） and the dielectric （HfO2） layers, we find that a silver/HfO2 stack, with suitable parameters, has a resolution of λ/5 at visible wavelengths.
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| 关 键 词： | 子波长 成像 金属 电介质 结构 |
| 收稿时间： | 2007-06-25 |
Subwavelength Imaging in a One-Dimensional Metal-Dielectric Structure |
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| LI Ming-Yu,GU Pei-Fu,ZHANG Jin-Long,LI Yi-Yu,LIU Xu.Subwavelength Imaging in a One-Dimensional Metal-Dielectric Structure[J].Chinese Physics Letters,2007,24(12):3539-3542. |
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| Authors: | LI Ming-Yu GU Pei-Fu ZHANG Jin-Long LI Yi-Yu LIU Xu |
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| Institution: | State Key Laboratory for Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027 |
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| Abstract: | |
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| Keywords: | 78 20 -e 42 70 Qs |
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