With inherent orthogonality, both the spin angular momentum (SAM) and orbital (OAM) of photons have been utilized to expand dimensions quantum information, optical communications, information processing, wherein simultaneous detection SAMs OAMs with a single element single-shot measurement is highly anticipated. Here, azimuthal-quadratic phase metasurface-based photonic transformation (PMT) illustrated for vortex recognition. Since different vortices are converted into focusing patterns...

Traditional technologies to generate and manipulate the orbital angular momentum (OAM) suffer from bulky size do not lend themselves nanophotonic systems. An ultrathin metasurface based on abrupt phase shift has recently been proposed as an alternative method. Nevertheless, gradient was generally approximated by multiple meta-atom/molecules with discrete levels of shift, which only increases design fabrication complexity but also causes difficulties in obtaining simultaneous electrical...

Abstract Recent advances in artificial subwavelength structures promise the realization of ultrathin, lightweight, and flat metalens, providing a potential candidate for traditional bulky curved lens. Nevertheless, most metalenses are generally suffering from serious off‐axis aberration, resulting limited field‐of‐view (FOV). Here, methodology to extend FOV metalens is presented by exploring local catenary optical fields symmetry transformation rotational transversal symmetry. As proof...

Abstract In 1860s, Gustav Kirchhoff proposed his famous law of thermal radiation, setting a fundamental contradiction between the infrared reflection and radiation. Here, for first time an ultrathin plasmonic metasurface is to simultaneously produce ultralow specular emission across broad spectrum wide incident angle range by combining low nature metal photonic spin–orbit interaction in spatially inhomogeneous structures. As proof‐of‐concept, phase gradient composed sub‐wavelength gratings...

Imaging polarimetry is one of the most widely used analytical technologies for object detection and analysis. To date, metasurface-based techniques are severely limited by narrow operating bandwidths inevitable crosstalk, leading to detrimental effects on imaging quality measurement accuracy. Here, we propose a crosstalk-free broadband achromatic full Stokes polarimeter consisting polarization-sensitive dielectric metalenses, implemented principle polarization-dependent phase optimization....

Pancharatnam-Berry geometric phase has attracted enormous interest in subwavelength optics and electromagnetics during the past several decades. Traditional theory predicts that is equal to twice rotation angle of anisotropic elements. Here, we show high-order phases multiple times could be achieved by meta-atoms with highfold rotational symmetries. As a proof concept, broadband angular spin Hall effect light optical vortices experimentally demonstrated using plasmonic metasurfaces...

Optical encryption is a promising approach to protecting secret information owing the advantages of low-power consumption, parallel, high-speed, and multi-dimensional processing capabilities. Nevertheless, conventional strategies generally suffer from bulky system volume, relatively low security level, redundant measurement, and/or requirement digital decryption algorithms. Here, we propose general optical strategy dubbed meta-optics-empowered vector visual cryptography, which fully exploits...

The geometric phase concept has profound implications in many branches of physics, from condensed matter physics to quantum systems. Although a long research history, novel theories, devices, and applications are constantly emerging with developments going down the subwavelength scale. Specifically, as one main approaches implement gradient modulation along thin interface, metasurfaces composed spatially rotated artificial structures have been utilized construct various planar meta-devices....

Abstract Multispectral complementary detection technologies have made single‐band camouflage materials ineffective, creating strong demand for multispectral compatible materials. Here, multiscale‐hierarchical metasurfaces (MHM) with large‐area low‐cost fabrication are proposed the first time to realize of dual‐band lasers, infrared and microwave. The MHM consists an all‐metallic metasurface array (AMMA) a microwave absorber. AMMA hinders lasers thermal detection, while absorber beneath is...

Metalenses have gained significant attention and been widely utilized in optical systems for focusing imaging, owing to their lightweight, high-integration, exceptional-flexibility capabilities. Traditional design methods neglect the coupling effect between adjacent meta-atoms, thus harming practical performance of meta-devices. The existing physical/data-driven optimization algorithms can solve above problems, but bring time costs or require a large number data-sets. Here, we propose...

Abstract Dispersion engineering of metamaterials is critical yet not fully released in applications where broadband and multispectral responses are desirable. Here we propose a strategy to circumvent the bandwidth limitation by implementing two-dimensional dispersion meta-atoms. Lorentzian resonances exploited as building blocks both dimensions dedicatedly designed meta-atoms construct expected dispersion. We validated this designing fabricating an anisotropic metamirror, which can...

We report the experimental demonstration of a two-dimensional (2D) metasurface with ordered rotation elements and show that it can be used to control symmetry light-matter interaction. A 2D lens is demonstrated in visible region by transforming rotational associated off-axis incident light translational symmetry, allowing an extraordinarily large field view (FOV) as well optical Fourier transformation. Furthermore, such planar has long focal depth, polarization selectivity subwavelength...

Catenary functions are exciting and fundamental building blocks in constructing various kinds of waves subwavelength structures. Here, a simple yet powerful approach inspired by catenary optics is proposed to realize efficient manipulation electromagnetic terms both amplitude phase. By properly engineering the fields frequency dispersion, lightweight metafilm-based broadband absorbers with polarization-independent bandwidth covering 0.65-6.2 GHz experimentally achieved, further broadened...

Abstract Metasurfaces with intense spin–orbit interactions (SOIs) offer an appealing platform for manipulation of polarization and wavefront. Reconfigurable beam based on switchable SOIs is highly desired in many occasions, but it remains a great challenge since most metasurfaces lack the flexibility optical performance fixed once fabricated. Here, are demonstrated numerically experimentally via combination plasmonic phase change materials (PCMs). As proof‐of‐concept, three metadevices...

A plasmonic splitter based on slot cavity is proposed and numerically investigated using finite-difference-time-domain (FDTD) methods. The structure consists of the input waveguide, a output waveguides. By varying positions waveguides, frequency power can be achieved in structure. Flexible ratio feasible through further adjusting coupling distance refractive index

Extraordinary Young's interference is an anomalous phenomenon observed at metallic surface in 2004. The shrinkage of slit size into deep subwavelength scale introduces many novel effects that cannot be described by classic theory. In this paper, the excited slits investigated via rigorous Maxwell's equations. We reveal a universal spin–orbit interaction mechanism associated with catenary optical fields 2D isotropic metal-dielectric structures for generation vortex array and spin Hall effect....

Abstract A flexible and transparent microwave–infrared bistealth structure is proposed to avoid composite detection in the microwave infrared bands. By combining intrinsic material properties with proper design, metamaterial can simultaneously achieve high absorption band, low emission optical transparency. The exhibits wide‐angle (40°), broadband (7.7–18 GHz), high‐efficiency (>90%) absorption. Furthermore, by using cover a metallic column, 10 dB reduction radar cross section at 7.5–18...

The coupling between photonic spin and orbital angular momenta is significantly enhanced at the subwavelength scale has found a plethora of applications in nanophotonics. However, it still great challenge to make such kind tunable with multiple sates. Here, versatile metasurface platform based on polyatomic phase-change resonators provided realize multiple-state switching momentum coupling. As proof concept, three modes, namely, symmetric coupling, asymmetric no are experimentally...

Abstract Optical metasurfaces enable novel ways to locally manipulate light's amplitude, phase, and polarization, underpinning a newly viable technology for applications, such as high‐density optical storage, holography, displays. Here, high‐security‐level platform enabled by centimeter‐scale plasmonic with full‐color, high‐purity, enhanced‐information‐capacity properties is proposed. Multiple types of independent information can be embedded into single metamark using full parameters light,...

Dispersion management is crucial in constructing spectrometers, superprisms, and achromatic lens systems. Unfortunately, the dispersion of natural materials determined by molecular energy levels with limited tunability, thus conventional methods controlling are complex need to trade off other aberration. Metasurface offers an alternative method overcome those limits via utilizing dedicatedly designed nanostructures that response special wavelength, which results well-engineered dispersions....

Abstract Benefiting from the excellent properties of manipulating electromagnetic waves at subwavelength scale, metasurfaces are widely used to realize metaholograms with a large viewing angle or diffraction angle. However, all previously reported holograms just utilize transmission (or reflection) space while corresponding reflection transmission) is abandoned. In this paper, combining off‐axis illumination method and polarization dependence geometric‐phase‐based metasurfaces, scheme...

In this paper, a hierarchical metamaterial (HMM) is reported to achieve compatible camouflage for laser, thermal infrared detectors, and radar. The HMM consists of an all-metallic metasurface array (AMMA) integrated with microwave absorber. top AMMA plays two roles. First, the gradient can reduce specular reflection at laser wavelength 1.06 µm less than 5% by tailoring wavefronts redirecting reflected energy non-specular angles. Second, acts as shielding transparent layer, ultralow surface...