Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Phys Rev Lett. 2009 Dec 11;103(24):243901. doi: 10.1103/PhysRevLett.103.243901. Epub 2009 Dec 7.
A perfect invisibility cloak is commonly believed to be undetectable from electromagnetic (EM) detection because it is equivalent to a curved but empty EM space created from coordinate transformation. Based on the intrinsic asymmetry of coordinate transformation applied to motions of photons and charges, we propose a method to detect this curved EM space by shooting a fast-moving charged particle through it. A broadband radiation generated in this process makes a cloak visible. Our method is the only known EM mechanism so far to detect an ideal perfect cloak (curved EM space) within its working band.
人们普遍认为，完美的隐形斗篷从电磁（EM）检测上是无法被探测到的，因为它等效于由坐标变换产生的弯曲但空的 EM 空间。基于坐标变换应用于光子和电荷运动的固有不对称性，我们提出了一种通过穿过它来探测这个弯曲 EM 空间的方法，即让一个快速移动的带电粒子穿过这个弯曲 EM 空间。在这个过程中产生的宽带辐射会使斗篷可见。到目前为止，我们的方法是唯一已知的 EM 机制，可以在其工作带宽内探测到理想的完美斗篷（弯曲的 EM 空间）。
