Abstract Electromagnetic metasurface cloaks provide an alternative paradigm toward rendering arbitrarily shaped scatterers invisible. Most transformation-optics (TO) intrinsically need wavelength-scale volume/thickness, such that the incoming waves could have enough long paths to interact with structured meta-atoms in cloak region and consequently restore wavefront. Other challenges of TO include polarization-dependent operation avoid singular parameters composite cloaking materials...

Abstract Achieving kaleidoscopic wavefront controls with a thin flat plate is pivotal for increasing data capacity yet still challenging in integrated optics. An anisotropic metasurface provides an efficient recipe primarily linear polarization, but less multiple functionalities at arbitrary spin states. Here, strategy of realizing spin‐decoupled high‐capacity multifunctional by multiplexing the frequency and wavevector degree freedom (DoF) reported. By integrating both geometric dynamic...

Abstract The fruitful progress toward light manipulation in reflective (R) or transmissive (T) geometry (half‐space) has facilitated strong aspiration towards full‐space wave control. Although R–T synergistic strategy promises large‐capacity and integrated functionality, it imposes difficulty challenges for direction of arrival (DoA) full space via an ultrathin flat device. As today, very limited demonstrations are reported single‐wavelength linear‐polarization operation space, significantly...

Achieving full-polarization ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>σ</mml:mi> </mml:math> ) invisibility on an arbitrary three-dimensional (3D) platform is a long-held knotty issue yet extremely promising in real-world stealth applications. However, state-of-the-art cloaks typically work under specific polarization because the anisotropy and orientation-selective resonant nature of artificial materials made -immune operation elusive terribly...

Achieving simultaneously multiple distinct wavefront manipulations using a single flat plate is pivotal in increasing the integration level and information capacity of an optoelectronic system. As today, state‐of‐the‐art metadevices have been devoted to functionalities by imparting two independent phase patterns triggered at orthogonal polarization states. However, fact, it terribly challenging realize individual amplitude−phase ( A−P ) control anisotropic metasurface. Herein, heterogeneous...

A novel concept of Janus polarization multiplexed circularly polarized (CP) metadevices is proposed to afford an alternative avenue toward versatility and capacity limit integrated functions. Six polarization-division channels are engineered by synergizing space division based on developed generalized spin-decoupling theory involving both geometric dynamic phases. By combining stimulating two compound metasurfaces at sides, four or six co/cross-CP facilitated <inline-formula...

Abstract With rapid development of holography, metasurface-based holographic communication scheme shows great potential in adaptive electromagnetic function. However, conventional passive metasurfaces are severely limited by poor reconfigurability, which makes it difficult to achieve wavefront manipulations real time. Here, we propose a strategy that on-demand target information is firstly acquired and encoded via depth camera integrated with modified YOLOv5s detection algorithm, then...

Many real-world applications, including adaptive radar scanning and smart stealth, require reconfigurable multifunctional devices to simultaneously manipulate multiple degrees of freedom electromagnetic (EM) waves in an on-demand manner. Recently, kirigami technique, affording versatile unconventional structural transformation, has been introduced endow metamaterials with the capability controlling EM a Here, we report for kirigami-inspired sparse meta-architecture, density 1.5% terms...

Recently, reconfigurable metasurfaces have facilitated dynamic manipulation of electromagnetic (EM) waves, opening new opportunities for fascinating meta-devices. So far, most devices are working in reflection region with limited polarization states. Here, we demonstrate a multifunctional transmissive metasurface both linearly and circularly polarized waves manipulations. Specifically, the designed meta-atom contains dual-layer metallic cross-strips one-layer circular slotted patch. Eight...

Abstract Electromagnetic wave multiplexing within a compact ultrathin device is pivotal for high‐capacity communications, wireless power transfer, and other applications. Among them, the independent amplitude phase (AP) control necessary, decoupling of full‐space scattering channels such as reflection (R) transmission (T) favoured high capacities information processing. This yet extremely challenging, even at single frequency, because A P are essentially correlated R‐T usually coupled. Here,...

Metamaterials have become a promising alternative for stealth technology due to their impressive abilities freely manipulate electromagnetic waves. With the development of radar detection technology, stringent performances are required metamaterial absorbers (MAs), such as wideband, wide‐angle operation, and thin thickness. Herein, systematic strategy achieve broadband MAs based on trilayer indium tin oxide (ITO) resistive films with multimodes is proposed. The operation mechanism bandwidth...

A synthesized strategy for achieving polarization-insensitive metalens is proposed by imposing identical parabolic phase patterns individually on two decoupled left-handed (spin up, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sigma +$ </tex-math></inline-formula> ) and right-handed down, -$ circular polarization (CP) channels of an anisotropic scheme. This enabled synergizing dynamic phases local...

Abstract Achieving multifunctional wavefront manipulations of waves with a flat and thin plate is pivotal for high-capacity communications, which however also challenging. A multi-layer metasurface suppressed mode crosstalk provides an efficient recipe primarily circular polarization, but all multiple functionalities still are confined to locked spin states modes. Here, spin-decoupled full-space control reported by multiplexing both linear momentum frequency degree freedom. We employed...

Abstract Achieving independent control of phase and amplitude is pivotal yet challenging for electromagnetic (EM) wave manipulation. Metasurface provides an efficient recipe to this challenge, but most the work reports so far are still confined in half space (transmission or reflection) manipulation linearly polarized EM waves, restricting itself from integrating more functionalities with complex wavefronts into one optoelectronic device. Here, a hybrid approach synthesizing propagation...

A strategy for folded reflectarray with low detectability and enhanced gain is presented. For this purpose, the engineered by combining a polarization-conversion focusing metasur face, frequency selective rasorber (FSR), diffusion metasurface. The FSR composed of lossy layer single-polarized I-shaped slotted surface (FSS) between which diffusive metasurface inserted in-band out-of-band cross-polarized radar cross-sectional (RCS) reduction. Therein, antenna exhibits transmission window two...

Achieving highly directive radiation with broadband operation, low scattering, and thin profile for a circularly polarized (CP) antenna is particularly challenging yet rarely reported. Here, we propose strategy of CP Cassegrain meta-antenna by combining planar helical antenna, metasurface main reflector, metamaterial subreflector. The reflector designed to achieve focusing waves at 13 GHz. subreflector chessboard-configured chiral slab composed two different types meta-atoms, aiming spin-...

In this paper, we propose an approach to design metasurfaces realize superior performance for monostatic and bistatic radar cross section (RCS) reduction within a wide bandwidth. By engineering four subarrays exhibit different hybrid focusing-linear phases metasurface, nearly uniform diffusive scattering can be inherently guaranteed. As illustration, fabricate proof-of-prototype metasurface experimentally demonstrate its wave-diffusion performances. Numerical experimental results both show...

The rapid development of metamaterials offers a new avenue to achieve exotic electromagnetic properties, such as perfect absorption for important stealth engineering applications. So far, there are few demonstrations wide-angle broadband absorption, due the stringent impedance matching requirement. Here, inspired by concept log-periodic dipole antenna (LPDA) emission, we propose based on both indium tin oxide (ITO) material and judiciously engineered metapyramid geometry. strip ITO arrays...

In article number 1900710, He-Xiu Xu and co-workers propose a strategy to realize spin-decoupled high-capacity multifunctional metasurface by multiplexing the frequency wavevector degree of freedom. By integrating both geometric dynamic phases in split ring resonator crossbars achessboard super metaatoms, inherent limitation spin-flipped Pancharatnam–Berry profiles can be completely decoupled between two spin states. Two proof-of-concept metadevices are experimentally demonstrated with...

A novel concept of multi-polarized electronically reconfigurable reflectarray (ERRA) is proposed to afford a multi-channel beam control using spin-decoupled programmable metasurface. Two PIN diodes are embedded into top copper structure achieve independent phase in two orthogonal circular polarization channels. To two-dimensional profile across metasurface, the states each meta-atom individually controlled by homemade logic controller with 882 outputs. scanning can be achieved altering...

Abstract Achieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications. Transmission-reflection-integrated metasurface provides efficient recipe primarily for multifunctional meta-device, however it challenging synergize both linear polarization (LP) circular (CP) single meta-plate. Here, multichannel full-space coding composed of interleaved shared-aperture meta-atom proposed...

Kirigami-inspired metasurface has attracted great attention in electromagnetic (EM) wave manipulations, due to its unprecedented and tailorable structural transformations via mechanical approaches. However, it is still challenging for wavefront control because of unfeasibility forming a phase gradient at different folding angle β. Here, we report strategy kirigami-inspired reconfigurable metasurfaces efficiently beam steering scattering through mechanically changing β, where the range β...