中国物理B ›› 2014, Vol. 23 ›› Issue (1): 14101-014101.doi: 10.1088/1674-1056/23/1/014101

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Extraordinary terahertz transmission through subwavelength spindle-like apertures in NbN film

郑小睿a, 程飞a, 吴敬波b, 金飚兵b, 朱北沂a   

  1. a National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
  • 收稿日期:2013-05-10 修回日期:2013-07-10 出版日期:2013-11-12 发布日期:2013-11-12
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00110 and 2011CBA00107) and the National Natural Science Foundation of China.

Extraordinary terahertz transmission through subwavelength spindle-like apertures in NbN film

Zheng Xiao-Rui (郑小睿)a, Cheng Fei (程飞)a, Wu Jing-Bo (吴敬波)b, Jin Biao-Bing (金飚兵)b, Zhu Bei-Yi (朱北沂)a   

  1. a National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
  • Received:2013-05-10 Revised:2013-07-10 Online:2013-11-12 Published:2013-11-12
  • Contact: Zheng Xiao-Rui E-mail:zhengxiaorui1986@hotmail.com
  • Supported by:
    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 extraordinary 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-like hole arrays patterned on the NbN film can pave the way for us to explore novel active tuning devices.

关键词: extraordinary terahertz transmission, superconducting transition, spindle-like apertures, localized surface plasmon mode

Abstract: 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 extraordinary 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-like hole arrays patterned on the NbN film can pave the way for us to explore novel active tuning devices.

Key words: extraordinary terahertz transmission, superconducting transition, spindle-like apertures, localized surface plasmon mode

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))