Abstract
Investigations of invisibility cloaks have been led by rigorous theories and such cloak structures, in general, require extreme material parameters. Consequently, it is challenging to realize them, particularly in the full visible region. Due to the insensitivity of human eyes to the polarization and phase of light, cloaking a large object in the full visible region has been recently realized by a simplified theory. Here, we experimentally demonstrate a device concept where a large object can be concealed in a cloak structure and at the same time any images can be projected through it by utilizing a distinctively different approach; the cloaking via one polarization and the image projection via the other orthogonal polarization. Our device structure consists of commercially available optical components such as polarizers and mirrors, and therefore, provides a significant further step towards practical application scenarios such as transparent devices and see-through displays.
Highlights
Investigations of invisibility cloaks have been led by rigorous theories and such cloak structures, in general, require extreme material parameters
We experimentally demonstrate a device concept where a large object can be concealed in a cloak structure and at the same time any images can be projected through it by utilizing a distinctively different approach; the cloaking via one polarization and the image projection via the other orthogonal polarization
Our device structure consists of commercially available optical components such as polarizers and mirrors, and provides a significant further step towards practical application scenarios such as transparent devices and see-through displays
Summary
Debasish Banerjee[1], Chengang Ji1,2 & Hideo Iizuka[3] received: 03 October 2016 accepted: 15 November 2016 Published: 13 December 2016. Modern human vision systems such as 3D displays rely on several psychological cues where overlapping of images, shading, textured gradients are used to create various depth perceptions in the human brain These image-based devices are often associated with ambiguities and errors because of the inability to correctly carry the depth profile information. In this Letter, we experimentally demonstrate an invisibility cloak where a large object can be concealed in the cloak structure and any images can be projected on it simultaneously This unique functionality can be obtained through the use of one polarization of light for the cloaking and the other orthogonal polarization for the image projection due to the insensitivity of human eyes to the polarization. Such approach has never been captured by any other reports in the past
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