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A Third Way to Cloak an Object: Cover-up with a Background Object
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
2014 (English)In: Progress In Electromagnetics Research, ISSN 1070-4698, E-ISSN 1559-8985, Vol. 149, 173-182 p.Article in journal (Refereed) Published
Abstract [en]

Based on a space folding transformation, we propose a new way to hide an object in full space, namely, to cover-up the scattering of the hidden object with the scattering of a background object so that only the scattering of the background object can be detected by an outside observer and the hidden object disappears electromagnetically (a very weak "ghost image" or perturbation may appear inside the strong background object image in an experiment). The present method is essentially different from previous methods of cloaking an object, namely, the optically isolated cloak and the scattering cancellation cloak, and thus provide a third way to cloak an object. Unlike all the previous methods of cloaking, the present full-space omni-directional invisibility simultaneously has the following features: (i) the hidden object can "see" the outside world without being detected; (H) the cloak can still work when some characteristics (e.g., shape and medium) of the hidden object change; and (Hi) there is no need to know the information of the incident wave in advance. The present work furthers efforts to achieve invisibility and conceal an object in a real environment in full space.

Place, publisher, year, edition, pages
2014. Vol. 149, 173-182 p.
Keyword [en]
Electromagnetic-Fields, Broad-Band, Light
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-158466DOI: 10.2528/PIER14100303ISI: 000346151200013Scopus ID: 2-s2.0-84908240508OAI: oai:DiVA.org:kth-158466DiVA: diva2:776858
Funder
Swedish Research Council, 621-2011-4620
Note

QC 20150108

Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2017-12-05Bibliographically approved

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