Illusion Properties in Perfect Cylindrical Devices
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Illusion Properties in Perfect Cylindrical Devices Mohammad Mehdi Sadeghi 1 Received: 13 September 2019 / Accepted: 11 November 2019 # Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract In this paper, illusion properties in a class of perfect cylindrical devices that contain a singular radial mapping have been reported. In these media, illusion can be implemented using alternating structure of only two kinds of metamaterial: zero index metamaterials and perfect electric conductors. Full-wave simulations in two dimensions have been performed to verify its functionality and its illusionary effects for TM polarization incident wave. The duality principle can be applied for TE polarization. Keywords Transformation optics theory . Illusion optics . Perfect cylindrical concentrator . Perfect cylindrical rotator
Introduction Transformation optics [1–4] is a rapidly evolving field that recently has received a lot of attention and has led to designing many interesting and novel devices. Invisibility cloak [1–3], concentrators [5–7], and rotators [8, 9] are some prominent example of novel devices that have been designed using this theory. In fact, transformation optics theory based on coordinate transformation that result in anisotropic materials parameters. These parameters can be realized by artificial structured metamaterials to achieve a lot of interesting applications. Among interesting aspects and applications of transformation optics theory, one of the most fascinating aspects of this theory, optical illusion, has attracting a lot of attention in both theoretical [10–12] and experimental [13, 14] fields. The perception of human from external world and environment is based on brain judgment about information of five senses. Among these five senses, visual sense plays an important role to make an excellent perception. In fact, analyzation of visual information is carried out by brain, so our final perception is through our brain judgment. Utilizing the mechanism of visual information processing, the brain can perceive entire illusory object instead of the object that it should be in real space. Hence, optical illusion refers to phenomena in which human visual system perceives objects in different
* Mohammad Mehdi Sadeghi [email protected] 1
Department of Physics, Jahrom University, Jahrom 74137-66171, Iran
visual properties from the reality. Usually, illusion takes place in shape, color, motion, orientation, etc. Transformation optics theory is one of the best way to create fascinating devices to generate visual illusion such that an object looks like another object. These kinds of devices can transform the scattered light into those of object that have chosen for illusion. As such, in principle, “perfect” optical illusions are an illusionary phenomenon obtained by covering an object with an illusion medium shell or layer to make that object looks like a completely different object in shape, size, or orientation. In Fig. 1, we have shown a simple schematic example of our idea for two ki
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