Electromagnetic Detection of a Perfect Invisibility Cloak
Author(s)
Zhang, Baile; Wu, Bae-Ian
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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.
Date issued
2009-12Department
Massachusetts Institute of Technology. Research Laboratory of ElectronicsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Zhang, Baile , and Bae-Ian Wu. “Electromagnetic Detection of a Perfect Invisibility Cloak.” Physical Review Letters 103.24 (2009): 243901. © 2009 The American Physical Society
Version: Final published version
ISSN
0031-9007