A metasurface carpet cloak for electromagnetic, acoustic and water waves

Yang, Yihao; Wang, Huaping; Yu, F. Richard; Xu, Zhiwei; Chen, Hongsheng

doi:10.1038/srep20219

Cited by 184 publications

(106 citation statements)

References 34 publications

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“…Yang et al 25 have demonstrated that a metasurface carpet cloak constructed by AMS can be used to hide large objects. In this section, we demonstrate that acoustic carpet cloak can also be designed by our AMS.…”

Section: Acoustic Carpet Cloak Designed By Amsmentioning

confidence: 99%

Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces

et al. 2016

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Acoustic metasurface (AMS) is a good candidate to manipulate acoustic waves due to special acoustic performs that cannot be realized by traditional materials. In this paper, we design the AMS by using circular-holed cubic arrays. The advantages of our AMS are easy assemble, subwavelength thickness, and low energy loss for manipulating acoustic waves. According to the generalized Snell’s law, acoustic waves can be manipulated arbitrarily by using AMS with different phase gradients. By selecting suitable hole diameter of circular-holed cube (CHC), some interesting phenomena are demonstrated by our simulations based on finite element method, such as the conversion of incoming waves into surface waves, anomalous reflections (including negative reflection), acoustic focusing lens, and acoustic carpet cloak. Our results can provide a simple approach to design AMSes and use them in wavefront manipulation and manufacturing of acoustic devices.

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Section: Acoustic Carpet Cloak Designed By Amsmentioning

confidence: 99%

Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces

et al. 2016

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“…Since it is first proposed, TO has found wide applications in designing novel electromagnetic (EM) devices, including invisibility cloak16171819, hyper-lens2021, waveguide222324, superscatters252627, etc. In this peper, we theoretically design a novel lens, which can not only take panoramic photos, but also compress the image, for it can fit the visual angle of the average person.…”

mentioning

confidence: 99%

Panoramic lens designed with transformation optics

Wang

Deng

Zheng

et al. 2017

Sci Rep

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The panoramic lens is a special kind of lens, which is applied to observe full view. In this letter, we theoretically present a panoramic lens (PL) using transformation optics method. The lens is designed with inhomogeneous and anisotropic constitutive parameters, which has the ability to gather light from all directions and confine light within the visual angle of observer. Simulation results validate our theoretical design.

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“…The acoustic analogue to electromagnetic metamaterials has already been validated in earlier works, and the possibility of extending the metamaterials concept to acoustic waves has already been investigated1. Building on this work, acoustic metamaterials have focused on developing artificial structures that can manipulate and control sound waves in unconventional ways2, made possible by the creation of unusual material properties such as double negativity (negative mass density and modulus)34, zero – or even negative – refractive index5678, acoustic imaging910, cloaking111213, transformation acoustics14, active acoustic metamaterials15, and acoustic metasurfaces1617. As a fundamental research subject in acoustic metamaterials, element design has been focused primarily on two kinds of strategies – locally-resonant materials318 and effective medium theory based composites19.…”

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confidence: 99%

Broadband Focusing Acoustic Lens Based on Fractal Metamaterials

Song

Huang

Dong

et al. 2016

Sci Rep

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Acoustic metamaterials are artificial structures which can manipulate sound waves through their unconventional effective properties. Different from the locally resonant elements proposed in earlier studies, we propose an alternate route to realize acoustic metamaterials with both low loss and large refractive indices. We describe a new kind of acoustic metamaterial element with the fractal geometry. Due to the self-similar properties of the proposed structure, broadband acoustic responses may arise within a broad frequency range, making it a good candidate for a number of applications, such as super-resolution imaging and acoustic tunneling. A flat acoustic lens is designed and experimentally verified using this approach, showing excellent focusing abilities from 2 kHz and 5 kHz in the measured results.

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A metasurface carpet cloak for electromagnetic, acoustic and water waves

Cited by 184 publications

References 34 publications

Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces

Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces

Panoramic lens designed with transformation optics

Broadband Focusing Acoustic Lens Based on Fractal Metamaterials

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