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A new type of coherent electromagnetic radiation source based on interference effect between forward and backward waves in an active metamaterial slab

机译:基于有源超材料平板中正向和反向波之间干扰效应的新型相干电磁辐射源

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摘要

In this paper, we shall show first that both reflection and transmission can be significantly amplified when a beam of electromagnetic wave is normally incident into an active (even lossy) metamaterial slab with near-zero-real-part-of-impedance, which is attributed to effect of interference between forward and backward waves in the slab. Then we demonstrate that extended steady electromagnetic waves can be achieved using a double-slab structure, which may be applied to generate coherent electromagnetic wave with very narrow frequency band and very low divergence angle. This work provides feasible scheme to construct a new type of source of coherent electromagnetic radiation based on new physical mechanism.
机译:在本文中,我们将首先表明,当电磁波束通常入射到具有接近零实际阻抗部分的有源(均匀有损)超材料平板中时,反射和透射都可以显着放大。归因于平板中正向和反向波之间的干扰效应。然后,我们证明了使用双平板结构可以实现扩展的稳定电磁波,该结构可以用于产生具有非常窄的频带和非常低的发散角的相干电磁波。这项工作为基于新的物理机制构建新型相干电磁辐射源提供了可行的方案。

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  • 来源
    《Applied Physics》 |2019年第4期|255.1-255.6|共6页
  • 作者单位

    Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210046, Jiangsu, Peoples R China|Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China|Key Lab Radio Frequency & Micronano Elect Jiangsu, Nanjing 210003, Peoples R China;

    Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210046, Jiangsu, Peoples R China;

    Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210046, Jiangsu, Peoples R China;

    Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210046, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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