Designing conformal cloaks by manipulating structures directly in the physical space.
TLDR
This work proposes a more convenient method to design conformal cloaks by manipulating structures directly in the physical space by using the finite element method to validate the theoretical analysis.Abstract:
The method to elaborately design the refractive index profile in the lower Riemann sheet of Zhukovski transformation plays an important role in the performance of this kind of conformal cloaks. However, for most proposed schemes, the mathematical calculations are complex. Here, we propose a more convenient method to design conformal cloaks by manipulating structures directly in the physical space. The designed cloak only needs symmetrical metal boundaries filled with normal dielectrics (refractive index ranges from 1 to 2) in the 'circular branch cut', which would be more feasible for future experimental implementation. Numerical simulations are performed by using the finite element method to validate our theoretical analysis.read more
Citations
More filters
Journal ArticleDOI
Strictly conformal transformation optics for directivity enhancement and unidirectional cloaking of a cylindrical wire antenna
TL;DR: In this article , a cylindrical shell made of an isotropic refractive index material is designed to improve the directivity of a wire antenna while making it unidirectionally invisible.
Journal ArticleDOI
A metamaterial-free omnidirectional invisibility cloak based on thrice transformations inside optic-null medium
TL;DR: In this paper , a full space omnidirectional cloak with an optic-null medium (ONM) shell and an isotropic homogeneous restoring core is designed by thrice coordinate transformations inside ONM.
Journal ArticleDOI
Full-space omnidirectional cloak by subwavelength metal channels filled with homogeneous dielectrics.
TL;DR: In this paper , a full-space omnidirectional cloak is designed based on transformation optics and optic-null medium, which only needed natural materials without metamaterials, and realized by subwavelength metal channels filled with isotropic dielectrics whose refractive indices range from 1 to 2.
Journal ArticleDOI
Full-view imaging on dynamic closed surface by curved-to-flat conversion lens.
TL;DR: Wang et al. as mentioned in this paper designed a curved-to-flat conversion lens (CFCL) based on optic-null medium, which can directly project/image optical patterns from closed object surface onto image plane (e.g., the focal plane of microscopy).
References
More filters
Journal ArticleDOI
Controlling Electromagnetic Fields
TL;DR: This work shows how electromagnetic fields can be redirected at will and proposes a design strategy that has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields.
Journal ArticleDOI
Metamaterial Electromagnetic Cloak at Microwave Frequencies
David Schurig,Jack J. Mock,B.J. Justice,Steven A. Cummer,John B. Pendry,Anthony F. Starr,David R. Smith +6 more
TL;DR: This work describes here the first practical realization of a cloak of invisibility, constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies.
Journal ArticleDOI
Optical Conformal Mapping
TL;DR: A general recipe for the design of media that create perfect invisibility within the accuracy of geometrical optics is developed, which can be applied to escape detection by other electromagnetic waves or sound.
Journal ArticleDOI
Three-Dimensional Invisibility Cloak at Optical Wavelengths
TL;DR: A three-dimensional invisibility-cloaking structure operating at optical wavelengths based on transformation optics is designed and realized and uses a woodpile photonic crystal with a tailored polymer filling fraction to hide a bump in a gold reflector.
Journal ArticleDOI
Transformation optics and metamaterials
TL;DR: The potential of transformation optics to create functionalities in which the optical properties can be designed almost at will is reviewed, which can be used to engineer various optical illusion effects, such as the invisibility cloak.