Overlapping illusions by transformation optics without any negative refraction material

Sun, Fei; He, Sailing

doi:10.1038/srep19130

Cited by 14 publications

(9 citation statements)

References 28 publications

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“…The current illusion techniques could neither change the number of heat signatures nor realize both interior and exterior illusion simultaneously. Actually, neither the existing transformation thermotics nor transformation optics have been reported to solve such two problems simultaneously yet. However, can we solve both problems stated in the Abstract in order to achieve interior and exterior illusions at one go with positive parameters throughout?…”

Section: Materials Details Of Each Triangle In the First Quadrantmentioning

confidence: 99%

Illusion Thermotics

et al. 2018

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"Fata Morgana" or "Mirage" phenomena have long been captivated as optical illusions, which actually relies on gradient-density air or vapor. Man-made optical illusions have witnessed significant progress by resorting to artificially structured metamaterials. Nevertheless, two long-standing challenges remain formidable: first, exotic parameters (negative or less than unity) become inevitable; second, the signature of original object is altered to that of a virtual counterpart. It is thus not able to address the holy grail of illusion per se, since a single virtual object still exposes the location. In this study, those problems are successfully addressed in a particular setup-illusion thermotics, which identically mimics the exterior thermal behavior of an equivalent reference and splits the interior original heat source into many virtual signatures. A general paradigm to design thermal illusion metadevices is proposed to manipulate thermal conduction, and empower robust simultaneous functions of moving, shaping, rotating, and splitting heat sources of arbitrary cross sections. The temperature profile inside the thermal metadevice can mislead the awareness of the real location, shape, size, and number of the actual heat sources. The present concept may trigger unprecedented development in other physical fields to realize multiple functionalized illusions in optics, electromagnetics, etc.

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Section: Materials Details Of Each Triangle In the First Quadrantmentioning

confidence: 99%

Illusion Thermotics

et al. 2018

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“…Two surfaces linked by optic-null medium (ONM) are equivalent surfaces in OST [18]. OST is broadly applicable in the design of lenses [18,20], electromagnetic open resonators [21], overlapped illusions [22], waveguide bends [23], scattering cover-up cloaks [24], subwavelength focusing [25], etc. ONM has extremely large permittivity and permeability along its main axis, and close to zero in orthogonal directions.…”

Section: Theoretical Methodsmentioning

confidence: 99%

A Camouflage Device Without Metamaterials

Sun¹,

Zhang²,

Evans³

et al. 2019

PIER

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We propose a camouflage device that can greatly reduce scattering in the microwave frequency using only uniform copper plates with no internal structuring (no metamaterials). The camouflage device is designed by optical surface transformation (OST), which is derived from transformation optics but much simpler than transformation optics. The key of our design is to choose suitable arrangement and lengths of these copper plates that satisfy Fabry-Perot condition. The proposed camouflage device can work when the detecting wave comes from a wide-angle range (not only works for some discrete angles). The proposed method will give a new and simple way to design and realize camouflage device.

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“…), any point on the same line segment ( y′ = C , 0< x′ < d , C is a constant) in the real space corresponds to one point ( x = 0, y = C ) in the reference space. We can use this feature to achieve an optical overlapping illusion (see Figure ) …”

Section: New Branches From Tomentioning

confidence: 99%

“…2D numerical simulation results for the optical overlapping illusion using ONM (Reproduced with permission from Ref. []. Copyright (2016) Sci.…”

Section: New Branches From Tomentioning

confidence: 99%

“…We can use this feature to achieve an optical overlapping illusion (see Figure 11). [180] ONM (Figure 11) has several advantages when compared with other methods to achieve an optical overlapping illusion. [181][182][183][184][185] We can achieve an optical overlapping illusion with arbitrary power magnification with a desired radiation pattern using the ONM.…”

Section: Onms For Optical Overlapping Illusionsmentioning

confidence: 99%

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Transformation Optics: From Classic Theory and Applications to its New Branches

Sun

Zheng

Chen

et al. 2017

Laser & Photonics Reviews

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In the modern world, the ability to manipulate and control electromagnetic waves has greatly changed people's lives. Novel optical and electromagnetic phenomena and devices will lead to new scientific trends and techniques in the future. The exploration of new theories of optical design and new materials for optical engineering has attracted great attention in recent years. Transformation optics (TO) provides a new way to design optical devices with extraordinary predesigned functions such as invisibility cloaks and electromagnetic wormholes. As the development of artificial electromagnetic media (e.g. metamaterials and metasurfaces) progresses, many of these novel optical devices designed by TO have been experimentally demonstrated and used in specific applications. Starting from the basic theory of transformation optics, we review its applications, extensions, new branches and recent developments in this paper.

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Overlapping illusions by transformation optics without any negative refraction material

Cited by 14 publications

References 28 publications

Illusion Thermotics

Illusion Thermotics

A Camouflage Device Without Metamaterials

Transformation Optics: From Classic Theory and Applications to its New Branches

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