| Extraordinary terahertz transmission through subwavelength spindle-like apertures in NbN filmExtraordinary terahertz transmission through subwavelength spindle-like apertures in NbN filmExtraordinary terahertz transmission through subwavelength spindle-like apertures in NbN filmExtraordinary terahertz transmission through subwavelength spindle-like apertures in NbN film |
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| 作者姓名： | 郑小睿 程飞 吴敬波 金飚兵 朱北沂 |
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| 作者单位： | [1]National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory tbr Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China [2]Research Institute of Superconductor Electronics （RISE）, School of Electronic Science and Engineering, Nanjing University, Nanfing 210093, China |
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| 基金项目： | Project supported by the National Basic Research Program of China （Grant Nos. 2011CBA00110 and 2011CBA00107） and the National Natural Science Foundation of China. |
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| 摘 要： | We studied numerically the temperature dependent extraordinary terahertz transmission through niobium nitride （NbN） film perforated with subwavelength spindle-like apertures. Both the resonant frequency and intensity of extraor- dinary terahertz transmission peaks can be greatly modified by the transition of NbN film from the normal state to the superconducting state. An enhancement of the （~1,0） NbN/magnesium oxide （MgO） peak intensity as high as 200% is demonstrated due to the combined contribution of both the superconducting transition and the excitation of localized surface plasmons （LSPs） around the apertures. The extraordinary terahertz transmission through spindle-fike hole arrays patterned on the NbN film can pave the way for us to explore novel active tuning devices.
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| 关 键 词： | extraordinary terahertz transmission supercOnducting transition spindle-like apertures localized surface plasmon mode |
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