Ray-optics cloaking devices for large objects in incoherent natural light

Hongsheng Chen (), Bin Zheng, Lian Shen, Huaping Wang, Xianmin Zhang, Nikolay I. Zheludev and Baile Zhang ()
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Hongsheng Chen: State Key Laboratory of Modern Optical Instrumentation, Zhejiang University
Bin Zheng: State Key Laboratory of Modern Optical Instrumentation, Zhejiang University
Lian Shen: State Key Laboratory of Modern Optical Instrumentation, Zhejiang University
Huaping Wang: Marvell Technology Group Boston
Xianmin Zhang: Zhejiang University
Nikolay I. Zheludev: Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton
Baile Zhang: Centre for Disruptive Photonic Technologies, Nanyang Technological University

Nature Communications, 2013, vol. 4, issue 1, 1-6

Abstract: Abstract A cloak that can hide living creatures from sight is a common feature of mythology but still remains unrealized as a practical device. To preserve the wave phase, the previous cloaking solution proposed by Pendry and colleagues required transformation of the electromagnetic space around the hidden object in such a way that the rays bending around the object inside the cloak region have to travel faster than those passing it by. This difficult phase preservation requirement is the main obstacle for building a broadband polarization-insensitive cloak for large objects. Here we propose a simplified version of Pendry’s cloak by abolishing the requirement for phase preservation, as it is irrelevant for observation using incoherent natural light with human eyes, which are phase and polarization insensitive. This allows for a cloak design on large scales using commonly available materials. We successfully demonstrate the cloaking of living creatures, a cat and a fish, from the eye.

Date: 2013
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DOI: 10.1038/ncomms3652

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