Ideal-lens cloaks and new cloaking strategies.

Jakub Bělín,Euan N Cowie,Mateusz Grunwald,Stephen Oxburgh,Johannes Courtial,Tomáš Tyc,Chris D White

doi:10.1364/oe.27.037327

Jakub Bělín, Euan N Cowie + Show 5 more

Open Access

https://doi.org/10.1364/oe.27.037327

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Abstract

Previously [Courtial et al., Opt. Express 26, 17872 (2018)] we presented the theory of transformation optics (TO) with ideal lenses and demonstrated an example, an omnidirectional lens. Here we interpret this omnidirectional lens in two different parameter regimes as ideal-lens cloaks that employ different cloaking strategies: a standard "shrink cloak" in which objects appear smaller (ideally zero) and a novel "abyss cloak" in which interior physical-space positions are mapped to the exterior and thus are visible only from certain directions. We proceed to combine two nested abyss cloaks into another novel, omnidirectional, "bi-abyss cloak." Our work significantly extends the arsenal of cloaking strategies.

Highlights

Transformation optics (TO) [1,2] is the science of using a material structure to distort light-ray trajectories within the structure such that the apparent shape and/or size of any object inside it is changed
Express 26, 17872 (2018)] we presented the theory of transformation optics (TO) with ideal lenses and demonstrated an example, an omnidirectional lens
We interpret this omnidirectional lens in two different parameter regimes as ideal-lens cloaks that employ different cloaking strategies: a standard “shrink cloak” in which objects appear smaller and a novel “abyss cloak” in which interior physical-space positions are mapped to the exterior and are visible only from certain directions

Summary

Introduction

Transformation optics (TO) [1,2] is the science of using a material structure to distort light-ray trajectories within the structure such that the apparent shape and/or size of any object inside it is changed. When an object is placed in certain regions, the distortion — the 3D mapping between physical (object) positions and their apparent (image) positions when viewed from the outside — is that of an ideal lens, and as the distorted object can be viewed from any direction, this structure is an omnidirectional lens.

Mapping between physical and virtual space

Cloaking strategies

Conclusions

Raytracing simulations