Diamond-shaped electromagnetic transparent devices with homogeneous material parameters

Li, Tinghua; Huang, Ming; Yang, Jingjing; Jiang, Yu; Yao-zhong, Lan

doi:10.1088/0022-3727/44/32/325102

Cited by 16 publications

(5 citation statements)

References 27 publications

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“…In the last decades, TO have attracted intensive attention because it enables exotic wave propagation. Broad and fascinating applications have been demonstrated, particularly in controlling the direction of electromagnetic (EM) wave propagation, such as cloaking [4][5][6][7][8][9][10][11], metalens [12][13][14][15], surface wave guides [16][17][18][19][20], absorbers [21] and whispering gallery mode resonators [22].…”

Section: Introductionmentioning

confidence: 99%

Surface wave direction control on curved surfaces

Wei¹,

Cen²,

Chui³

et al. 2020

J. Phys. D: Appl. Phys.

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Transformation optics (TO) has been recognized as an established scheme that can precisely manipulate electromagnetic surface wave propagations. Utilising the advantages of the TO technique, we proposed a TO device which can control the propagation direction of surface waves. The device is based on a generalized Eaton lens and can be realized on curved surfaces. Such a device can be composed of stacked ring layers, where the refractive index of each ring segment can be individually engineered. By engineering the refractive index, the stacked ring structure can guide the propagation direction of the surface wave. It may open a new door to manipulate surface wave propagation on demand.

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Section: Introductionmentioning

confidence: 99%

Surface wave direction control on curved surfaces

Wei¹,

Cen²,

Chui³

et al. 2020

J. Phys. D: Appl. Phys.

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“…Recently, based on the linear coordinate transformation method, 2D and three-dimensional (3D) homogeneous electromagnetic transparent device with diamond shape have been proposed. [33,34] Though each block of this diamond shaped transparent device consists of homogeneous parameters, the permeability tensors are still anisotropic, which makes the device difficult to fabricate. To further remove the inhomogeneous and anisotropic material parameters, a 2D simplified cylindrical electromagnetic transparent device [35] was developed in our previous work, where only the axial material parameters are represented as a function of radius.…”

Section: Introductionmentioning

confidence: 99%

Homogeneous transparent device and its layered realization

Yang¹,

Huang²,

Yang³

et al. 2018

Chinese Phys. B

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Arbitrarily shaped electromagnetic transparent devices with homogeneous, non-negative, anisotropic and generic constitutive parameters are proposed based on linear transformation optics, which provides the flexibility for device design that is applicable for the practical fabrication. To remove the anisotropic property, a layered structure is developed based on effective medium theory. Simulation results show that with sufficient layers, the performance of the layered transparent device is nearly as perfect as an ideal device, and it is able to protect an antenna without sacrificing its performance. The feasibility of designing a transparent device by using natural isotropic materials instead of metamaterials would dramatically reduce the difficulty of fabrication and further promote the practicality of the device.

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“…To overcome such difficulties, a more feasible strategy is presented by our group for designing diamond-shaped transparent devices with homogeneous parameters based on coordinate transformation along the orthogonal direction. [28] Even though this method eliminates the requirement of material inhomogeneity, the parameter distribution of device in each region is still anisotropic. Moreover, it is noted that the previous two design methods share a common feature that in order to derive the material parameters of the device, the transformation function between the original space and the transformed space must be known in advance.…”

Section: Introductionmentioning

confidence: 99%

Inverse design-based metamaterial transparent device and its multilayer realization

Li¹,

Huang²,

Yang³

et al. 2014

Chinese Phys. B

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We propose an inverse method to determine the material parameters of a transparent device without any knowledge of the corresponding transformation function. The required parameters are independently obtained and expressed as functions of the introduced generator. Moreover, to remove the inhomogeneity and anisotropy of material parameters, a layered transparent device composed of only homogeneous and isotropic materials is presented based on the effective medium theory. The feasibility of using the layered device in antenna protection is also investigated. Full-wave simulation is carried out for verification. This work paves a new way toward designing metamaterial devices without specifying the underlying coordinate transformation, and has great guiding significance for the practical fabrication of transparent devices.

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Diamond-shaped electromagnetic transparent devices with homogeneous material parameters

Cited by 16 publications

References 27 publications

Surface wave direction control on curved surfaces

Surface wave direction control on curved surfaces

Homogeneous transparent device and its layered realization

Inverse design-based metamaterial transparent device and its multilayer realization

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