Omnidirectional Conformal Cloak Without Geometrical Dispersion

Liu, Yichao; Sun, Fei; He, Sailing

doi:10.1103/physrevapplied.12.064009

Cited by 5 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The separation of metal plates should be on the order of subwavelength, and the orientation of metal plates should consist with the main axis of optic-null medium, which performs as subwavelength channel to guide the EM wave directionally with respect to the TM waves. [28] The dielectrics are filled within each subwavelength channel to reduce the reflection.The relevant relation is as follows:…”

Section: Simulation Resultsmentioning

confidence: 99%

Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics*

Sun¹,

Liu²,

Yang³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

By introducing an optic-null medium into the finite embedded transformation, a reflectionless spatial beam bender is designed, which can steer the output beam by a fixed pre-designed angle β for an arbitrary incident angle. The bending angle β of the beam bender is determined by the geometrical angle of the device, which can be changed by simply choosing different geometrical angles. For various bending angles, the designed spatial beam bender can be realized by the same materials (i.e., an optic-null medium), which is a homogenous anisotropic material. Numerical simulations verify the reflectionless bending effect and rotated imaging ability of the proposed beam bender. A reduction model of the optic-null medium is studied, which can also be used for a reflectionless spatial beam bender with a pre-designed bending angle.

show abstract

Section: Simulation Resultsmentioning

confidence: 99%

Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics*

Sun¹,

Liu²,

Yang³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

show abstract

A metamaterial-free omnidirectional invisibility cloak based on thrice transformations inside optic-null medium

Liu

Sun²,

Yang³

et al. 2023

Optics & Laser Technology

View full text Add to dashboard Cite

Strictly conformal transformation optics for directivity enhancement and unidirectional cloaking of a cylindrical wire antenna

Eskandari

2022

Sci Rep

View full text Add to dashboard Cite

Using conformal transformation optics, 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. If the incident wave comes from a specific direction, it is guided around the wire. Furthermore, when an electrical current is used to excite the wire, the dielectric shell transforms the radiated wave into two lateral beams, improving directivity. The refractive index of the dielectric shell is calculated using the transformation optics recipe after establishing a closed-form conformal mapping between an annulus and a circle with a slit. The refractive index is then modified and discretized using a hexagonal lattice. Ray-tracing and full-wave simulations with COMSOL Multiphysics are used to validate the functionality of the proposed shell.

show abstract

Omnidirectional Conformal Cloak Without Geometrical Dispersion

Cited by 5 publications

References 36 publications

Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics*

Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics*

A metamaterial-free omnidirectional invisibility cloak based on thrice transformations inside optic-null medium

Strictly conformal transformation optics for directivity enhancement and unidirectional cloaking of a cylindrical wire antenna

Contact Info

Product

Resources

About