Concealing a Passive Sensing System with Single-Negative Layers

Zhu, Xuefeng; Zou, Xin‐Ye; Zhou, Xiao-Wei; Liang, Bin; Cheng, Jianchun

doi:10.1088/0256-307x/29/1/014102

Cited by 9 publications

(5 citation statements)

References 13 publications

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“…In Fig. 3 Unidirectional field localization could be useful in many aspects, such as directional sensing, [19,20] one-way nonlinearity, and non-blind invisibility. In order to evaluate the degree of unidirectional field localization, we calculate the contrast ratio η = I R /I L for different orders of FP resonances in Fig.…”

Section: Pt Latticesmentioning

confidence: 99%

Bifurcated overtones of one-way localized Fabry–Pérot resonances in parity-time symmetric optical lattices

Gaafer¹,

Shen²,

Peng³

et al. 2017

Chinese Phys. B

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Since the first observation of parity-time (PT) symmetry in optics, varied interesting phenomena have been discovered in both theories and experiments, such as PT phase transition and unidirectional invisibility, which turns PT-symmetric optics into a hotspot in research. Here, we report on the one-way localized Fabry-Pérot (FP) resonance, where a welldesigned PT optical resonator may operate at exceptional points with bidirectional transparency but unidirectional field localization. Overtones of such one-way localized FP resonance can be classified into a blue shifted branch and a red shifted branch. Therefore, the fundamental resonant frequency is not the lowest one. We find that the spatial field distributions of the overtones at the same absolute order are almost the same, even though their frequencies are quite different.

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Section: Pt Latticesmentioning

confidence: 99%

Bifurcated overtones of one-way localized Fabry–Pérot resonances in parity-time symmetric optical lattices

Gaafer¹,

Shen²,

Peng³

et al. 2017

Chinese Phys. B

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“…[17] Although the superlens cloaking by Zhu et al is proved to be effective in reducing acoustic scattering from an acoustic sensor, such a device is composed of inhomogeneous anisotropic media which require, even in a reducible way, a large number of isotropic media with different parameters, and thus bringing the difficulty in fabricating it. Later, Zhu et al [18] revised their folding transformation scheme and simplified the cloaking method, in which only three types of SNMs are needed. Xu et al [19] further simplified the superlens fabrication process, and in their scheme, only one single pair of isotropic media is required for reducing the acoustic scattering.…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of acoustic invisibility with multilayer structure based on scattering analysis

et al. 2016

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In this paper, acoustic scattering from the system comprised of a cloaked object and the multilayer cloak with only one single pair of isotropic media is analyzed with a recursive numerical method. The designed acoustic parameters of the isotropic cloak media are assumed to be single-negative, and the resulting cloak can reduce acoustic scattering from an acoustic sensor while allowing it to receive external information. Several factors that may influence the performance of the cloak, including the number of layers and the acoustic dissipation of the medium are fully analyzed. Furthermore, the possibility of achieving acoustic invisibility with positive acoustic parameters is proposed by searching the optimum value in the parameter space and minimizing the scattering cross-section.

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“…So it also has some difficulty for the experimental fabrication and the application in engineering field. In order to solve the problem, then a multi-layered cloak model is proposed to cloak an electromagnetic sensor only by applying three kinds of homogeneous SNG instead of using inhomogeneous materials [19]. The numerical results show that the inserted sensor can receive signals from outside environment while it can be hardly detected by the surrounding for electromagnetic wave.…”

Section: Introductionmentioning

confidence: 99%