Achromatic polarization manipulation by dispersion management of anisotropic meta-mirror with dual-metasurface

Guo, Yinghui; Yan, Lianshan; Pan, Wei; Luo, Bin

doi:10.1364/oe.23.027566

Cited by 38 publications

(16 citation statements)

References 33 publications

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“…The impedances can be retrieved from the simulated S‐parameters and explained by equivalent circuit theory (see Figure S2 in the Supporting Information). Once the equivalent surface impedance of the metasurface is determined, the transmission and reflection properties of bilayer metasurface can be calculated based on transfer matrix method (see Figure S3 in the Supporting Information). The calculated results presented in Figure c are consistent with the simulated results in Figure c.…”

Section: Beam Steering Performances (Scanning Range Device Thicknessmentioning

confidence: 99%

High‐Efficiency and Wide‐Angle Beam Steering Based on Catenary Optical Fields in Ultrathin Metalens

Guo

et al. 2018

Advanced Optical Materials

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159

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3D fabrication technology. [4] Superposition of the images captured by each individual ommatidia can create an imaging system with FOV close or even larger than 180°. [2] Theoretically, it is also possible to create single spherically symmetrical lens with a 360° FOV, i.e., the so called Luneberg lens, in which light incident from infinity at different positions will perfectly focus on the same geometric point on the perimeter without aberration. [3] Nevertheless, the requirement of nonhomogeneous refractive index distribution of Luneberg lens and the precise shape, fill factor, size of ommatidium pose great challenges to implementation. Although one can replace the spherical and nonhomogeneous index lenses by 2D geodesic surfaces with constant refractive index, [5] it is still not easy to be implemented in planar optical systems.Recently, 2D metasurface has emerged as a promising alternative to traditional bulky components in polarization manipulation, [6,7] super-resolution focusing, [8,9] vortex beam generation, [10][11][12] and hologram. [13][14][15][16][17][18][19] The readers may refer to the latest reviews [20][21][22][23] for a comprehensive view. The unique properities of metasurface are embodied in following two aspects. On the one hand, the abrupt phase change along the metasurface leads to the classical refractive and reflection law is expanded to a generalized case. [23] On the other hand, metasurface provides an alternative to overcome many tough problems faced by traditional optical engineers, [20] leading to the so-called Optical Engineering 2.0. [24] Owing to the design flexibility in phase modulation, single metalens could eliminate the spherical aberration even at very large numerical aperture (NA). Also, the color aberrations of metalens also have been corrected by single metasurfaces recently. [25][26][27][28][29] In principle, single-layered metasurface lenses inevitably suffer from the off-axis aberration, despite wide-angle absorption, [30,31] hologram, [13,[32][33][34] and other functional metasurfaces [35,36] have been demonstrated elsewhere. A direct method to realize wide FOV is adopting multilayered metasurface lenses, [37,38] same as the traditional approaches [39] but with a more compact volume. For instance, a doublet corrected 2D metalens is proposed with a FOV reaching 60 × 60°. [37] Similar doublets have been demonstrated in the visible region with a FOV of 50°. [38] From a geometric perspective, the angle-induced image aberration could be considered as a consequence of the breaking Recent advances in artificial subwavelength structures promise the realization of ultrathin, lightweight, and flat metalens, providing a potential candidate for traditional bulky and curved lens. Nevertheless, most metalenses are generally suffering from serious off-axis aberration, resulting in a limited field-ofview (FOV). Here, a methodology to extend the FOV of metalens is presented by exploring the local catenary optical fields and symmetry transformation from rotational symmetry to transversal ...

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Section: Beam Steering Performances (Scanning Range Device Thicknessmentioning

confidence: 99%

High‐Efficiency and Wide‐Angle Beam Steering Based on Catenary Optical Fields in Ultrathin Metalens

Guo

et al. 2018

Advanced Optical Materials

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159

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“…The orientations of the cut-wires in each unit are orthogonal to each other to ensure we can make the dispersion engineering in both dimensions. 33,34 Besides, to broaden the working bandwidth of the metasurface, the substrate thickness d is selected as 3 mm (one quarter of the wavelength at 17 GHz) to form a Fabry-Pérot-like cavity with low quality factor so that we can further extend the operation bandwidth.…”

Section: Unit Cell Design and Bandwidth Optimizationmentioning

confidence: 99%

“…Subsequently, bandwidth ratio over 5 : 1 was achieved by 2D dispersion management. 33,34 Recently, a broadband metasurface for simultaneous thermal infrared invisibility and holographic illusion has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband manipulation of electromagnetic waves by bilayer scattering engineered gradient metasurface

Guo

Yan

et al. 2018

RSC Adv.

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Realizing effective scattering manipulation in broad operation band is a long pursuit. Here, we present an ultra-broadband metasurface to manipulate the scattering of electromagnetic waves based on spinorbit interaction induced virtual shaping. The spin conversion efficiency is over 90% from 4.9 GHz to 22.8 GHz accompanied by a abrupt phase shift covering 0-2p, which is dependent on the orientation of the subwavelength of building blocks. Both Bessel-and triangular-type virtual profile shapes are developed for electromagnetic illusion and camouflage. Simulation and experimental results demonstrate that the significant backward RCS reduction of 10 dB is obtained from 5.5 to 22.5 GHz. The significant improvement in working bandwidth can be attributed to: the application of the dispersionless phase-shift properties of P-B phase, two-dimensional dispersion management methodology and catenary shaped local field enhancement in the metallic gap. The proposed design may have the potential applications in eletromagnetic manipulation and object detection.

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“…These planar structures are capable to manipulate the amplitude, phase and polarization of wavefronts leading to versatile functionalities from microwave to optical wavelengths in fields such as absorbers [1], planar lenses [2], terahertz switches [3], polarization converters [4], [5], optical holography [6] and optical antenna arrays at visible wavelengths [7].…”

Section: Introductionmentioning

confidence: 99%

Highly Accurate and Fast Convergent Diffractive Interface Theory for Fast Analysis of Metasurfaces

Nekuee

Khavasi

Akbari

2016

IEEE J. Quantum Electron.

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Recently an approximate formalism [Opt. Express 23, 2764] called diffractive interface theory (DIT) has been reported for the fast analysis of the optical response of metasurfaces, subwavelength two-dimensional periodic arrays. In this method the electromagnetic boundary conditions are derived using the susceptibility distribution of the metasurface such that the analysis of metasurface is possible without solving any eigenvalue equation inside the grating layer. In this paper, we modify the boundary conditions to achieve more accurate results. In addition, in this work, correct Fourier factorization rules are also applied leading to faster convergence rate. The obtained results are compared with the former formalism and Fourier modal method (FMM). It is demonstrated that the accuracy of the results are far better than the previous formalism and very close to FMM, while it has less computational cost relative to FMM.

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Achromatic polarization manipulation by dispersion management of anisotropic meta-mirror with dual-metasurface

Cited by 38 publications

References 33 publications

High‐Efficiency and Wide‐Angle Beam Steering Based on Catenary Optical Fields in Ultrathin Metalens

High‐Efficiency and Wide‐Angle Beam Steering Based on Catenary Optical Fields in Ultrathin Metalens

Ultra-wideband manipulation of electromagnetic waves by bilayer scattering engineered gradient metasurface

Highly Accurate and Fast Convergent Diffractive Interface Theory for Fast Analysis of Metasurfaces

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