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Opt Lett. 2013 Aug 1;38(15):2821-4. doi: 10.1364/OL.38.002821.

One-way invisible cloak using parity-time symmetric transformation optics.

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1
NSF Nanoscale Science and Engineering Center, University of California, Berkeley, California 94720, USA.

Abstract

We propose a one-way invisible cloak using transformation optics of parity-time (PT) symmetric optical materials. At the spontaneous PT-symmetry breaking point, light is scattered only for incidence along one direction since the phase-matching condition is unidirectionally satisfied, making the cloak one-way invisible. Moreover, optical scattering from the one-way cloak can be further engineered to realize more interesting effects, for example, creating a unidirectional optical illusion of the concealed object.

PMID:
23903152
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