Chen Xudong, Uhlmann Gunther
Department of Electrical and Computer Engineering, National University of Singapore, 117576 Singapore.
Opt Express. 2011 Oct 10;19(21):20518-30. doi: 10.1364/OE.19.020518.
The ideal transformation optics cloaking is accompanied by shielding: external observations do not provide any indication of the presence of a cloaked object, nor is any information about the fields outside detectable inside the cloaked region. In this paper, a transformation is proposed to cloak three-dimensional objects for electromagnetic waves in sensor mode, i.e., cloaking accompanied by degraded shielding. The proposed transformation tackles the difficulty caused by the fact that the lowest multipole in three-dimensional electromagnetic radiation is dipole rather than monopole. The loss of the surface impedance of the sensor plays an important role in determining the cloaking modes: ideal cloaking, sensor cloaking and resonance.
外部观测无法提供任何关于被隐身物体存在的迹象，并且在隐身区域内也检测不到关于外部场的任何信息。本文提出一种变换，用于在传感器模式下对三维物体进行电磁波隐身，即伴随着屏蔽性能退化的隐身。所提出的变换解决了由三维电磁辐射中最低多极子是偶极子而非单极子这一事实所导致的难题。传感器表面阻抗的损耗在确定隐身模式（理想隐身、传感器隐身和共振）方面起着重要作用。
