Reconstruction of light profiles with amplitude and phase information, called holography, is an attractive optical technology various significant applications such as three-dimensional imaging data storage. Subwavelength spatial control both essential requirement for ideal hologram. However, traditional holographic devices suffer from their restricted capabilities incomplete modulation in visible light; this results sacrifice information undesirable occurrences critical noises images....

Abstract Metalenses have shown a number of promising functionalities that are comparable with conventional refractive lenses. However, current metalenses still far from commercialization due to the formidable fabrication costs. Here, we demonstrate low-cost dielectric metalens works in visible spectrum. The material consists matrix-inclusion composite which hierarchy satisfies two requirements for single-step fabrication; high index and pattern-transfer capability. We use UV-curable resin as...

Printable metalenses composed of a silicon nanocomposite are developed to overcome the manufacturing limitations conventional metalenses. The is synthesized by dispersing nanoparticles in thermally printable resin, which not only achieves high refractive index for high-efficiency but also printing compatibility inexpensive exhibits >2.2 near-infrared regime, and 10% uniform volume shrinkage after thermal annealing, so appropriate elaborate nanofabrication compared commercial high-index...

Abstract Metasurface holography, the reconstruction of holographic images by modulating spatial amplitude and phase light using metasurfaces, has emerged as a next‐generation display technology. However, conventional fabrication techniques used to realize metaholograms are limited their small patterning areas, high manufacturing costs, low throughput, which hinder practical use. Herein, efficiency hologram one‐step nanomanufacturing method with titanium dioxide nanoparticle‐embedded‐resin,...

Although conventional metasurfaces have demonstrated many promising functionalities in light control by tailoring either phase or spectral responses of subwavelength structures, simultaneous both has not been explored yet. Here, we propose a concept dual-mode that enables and for two kinds operation modes transmission reflection, respectively. In the mode, metasurface acts as distribution incident light. reflection reflected colored image is produced under white illumination. We also...

Optical metasurfaces, composed of ultrathin subwavelength meta-atoms, have enabled flat-optics and corresponding flat optical components such as lenses, color filters, absorbers. Among the plethora applications currently attracting great interest, next generation display techniques could further benefit from metasurface technology. Thanks to relatively simple mechanisms amplitude phase modulation light by many recent research achievements in metasurfaces are related applications. In this...

Metasurfaces have shown many interesting physical phenomena by designing the subwavelength antennas and, thus, controlling complex amplitude of optical waves. Practicality is one biggest challenges metasurfaces because practical applications not been realized yet, despite well-demonstrated such as achromatic lenses, holograms, and cloaks. Early composed plasmonic resonators a significant loss power at visible wavelengths. Amorphous silicon, which easy to fabricate, can overcome only above...

Abstract The high refractive index of hydrogenated amorphous silicon (a‐Si:H) at optical frequencies is an essential property for the efficient modulation phase and amplitude light. However, substantial loss represented by its extinction coefficient prevents it from being utilized widely. Here, bonding configurations a‐Si:H are investigated, in order to manipulate produce a material that competitive with conventional transparent materials, such as titanium dioxide gallium nitride. This...

Abstract Metasurfaces consisting of subwavelength structures, so‐called meta‐atoms, have steadily attracted considerable attention for advanced holography due to their advantages in terms high‐resolution holographic images, large field view, and compact device volume. In contrast conventional displays using bulky diffractive optical elements, metasurface enables arbitrary complex wavefront shaping with a much smaller footprint. this review, we classify according the meta‐atom design...

Metasurfaces are two-dimensional arrays of subwavelength optical antennas and have possible applications next-generation components such as ultrathin lenses, high-resolution holograms, cloaks. The remaining challenges in the field metasurfaces involve development methods to manufacture those tiny nanostructures on a large scale. There been many attempts overcome limitations electron beam lithography which is conventional method fabricate metasurfaces. This review provides discusses recent...

Metalenses comprised of artificial subwavelength structures known as meta-atoms have demonstrated abilities beyond conventional bulky optical components by modulating the phase, amplitude, and polarization light in an ultrathin planar form factor. In this Tutorial, we present fundamental principles practical design procedures to exploit metalenses, including achromaticity, high numerical aperture, tunability. The include both plasmonic dielectric meta-atoms, which require different physics...

Nanofabrication techniques are essential for exploring nanoscience and many closely related research fields such as materials, electronics, optics photonics. Recently, three-dimensional (3D) nanofabrication have been actively investigated through different ways, however, it is still challenging to make elaborate complex 3D nanostructures that researchers want realize further interesting physics studies device applications. Electron beam lithography, one of the two-dimensional (2D)...

This work presents a facile nanocasting technique to fabricate dielectric metasurfaces at low cost and high throughput. A flexible polymer mold is replicated from master mold, then the used shape particle-embedded UV-curable resin. The compatible with curved substrates. hard-polydimethylsiloxane improves mechanical stability of providing sub-100 nm patterning resolution. patterned resin itself can as metasurface without secondary operations because particles sufficiently increase refractive...

Abstract A broadband tunable absorber is designed and fabricated. The comprised of a dielectric-metal-dielectric multilayer plasmonic grating. large size device fabricated by nano-imprinting method. experimental results show that over 90% absorption can be achieved within visible near-infrared regimes. Moreover, the high controlled changing polarization incident light. This polarization-sensitive have practical applications such as high-efficiency detectors transmissive polarizer.

A polarization independent holographic beam splitter that generates equal-intensity beams based on geometric metasurface is demonstrated. Although conventional metasurfaces have the advantages of working over a broad frequency range and having intuitive design principles, limitation they only work for circular polarization. In this work, Fourier holography used to overcome limitation. perfect overlap resulting from origin-symmetry encoded image enables operation metasurfaces. The designed...

Abstract Conventional multicolor metaholograms suffer from the fundamental limitations of low resolution and irreducible noise because unit structure functionality is still confined to a single wavelength. Here, we propose wavelength-decoupled metasurfaces that enables control chromatic phase responses independently in full range 0 2 π for each The propagation associated with geometric rectangular dielectric nanostructures plays critical role embed dual response into nanostructure. A...

As an analog of electrical diodes, optical diodes enable asymmetric transmission or one‐way light. Here, a thin bilayer metamaterial supporting is experimentally demonstrated for linearly polarized light but not circularly over broad bandwidth up to 50 terahertz in the near‐infrared region. A simple and intuitive working principle based on symmetry inherent design provided, along with full‐wave simulations that agree well experimental results. It also proved extremely insensitive spatial...

We theoretically investigate a metasurface perfect absorber based on indium-tin-oxide as active material. Our design scheme relies conventional metal–oxide–semiconductor model and the Drude model. Inducing voltage into device causes blue-shift of 50 nm in reflectance spectrum infrared region. The total thickness is only 3.5% working wavelength λ = 2.56 μm, rate change reaches 5.16 at μm. Because material that we use has advantages easy fabrication fast response, our approach can be used for...

Metasurfaces consisting of artificially designed meta-atoms have been popularized recently due to their advantages amplitude and phase light control. However, the electron beam lithography method for metasurface fabrication has high cost low throughput, which results in a limitation metasurfaces. In this study, nanocomposite printing technology is used fabricate high-efficiency metasurfaces with cost. To demonstrate efficiency proposed method, metahologram fabricated using nanocomposite. The...

Abstract Fresnel zone plates consisting of multiple concentric rings have been realized by tailoring amplitude, phase and polarization light, but conventional require totally different materials to control each property reducing light controllability. Here, a metasurface plate in which are composed subwavelength antenna arrays is proposed individually the consistent material platform metasurfaces. Hence, versatile degrees freedom can be achieved focus electromagnetic waves. We verify that...

Achieving the simultaneity of ventilation and soundproofing is a significant challenge in applied acoustics. Ventilated relies on interplay between local resonance nonlocal coupling acoustic waves within sub-wavelength structure. However, previously studied structures possess limited types fundamental resonators lack modifications from basic arrangement. These constraints often force specified position each attenuation peak low absorption performance. Here, we suggest in-duct-type sound...