Electromagnetic detection of a perfect invisibility cloak

• Main Authors: Zhang, Baile, Wu, Bae-Ian
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2012
• Subjects: DRNTU::Science::Chemistry::Physical chemistry
• Online Access: https://hdl.handle.net/10356/95133; http://hdl.handle.net/10220/8741
• Institution: Nanyang Technological University

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.