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Here, Junsuk Rho and co-workers propose and experimentally demonstrate a metasurface supporting a large and efficient spin Hall effect of light in optical wavelength. The spin Hall shifts reaching ten wavelengths with efficiencies over 70% are observed.

Although hyperlenses made of metamaterials can image sub-diffraction-limited objects, they are limited to one-dimensional magnification and ultraviolet frequencies. Here, the authors demonstrate a spherical hyperlens for visible light far-field imaging, with a resolution of 160 nm in both lateral dimensions.

We achieve a 2D plasmon-enhanced photoluminescence and long-range surface propagation of it via surface lattice resonance (SLR) in a vdWM-Au slot lattice.

A single-metasurface-based holographic light projection covering the whole 360° field of view is realized by optimizing the metasurface design through a neural network and applying 360° structured light for holographic light projection and three-dimensional imaging.

A 500-μm-thick design simplifies fabrication and reduces weight while offering good brightness and colour uniformity for augmented reality near-eye optical design.

Photonic topological insulators offer unconventional, yet still difficult, ways to control light flow. Here the authors demonstrate a 3D photonic topological insulator with surface states confined and guided on the surfaces without adding any cladding.

Chiral metamaterials present interesting ways to manipulate and distinguish between different circular polarizations of light. Zhanget al. realize chiral metamaterials that exhibit photoinduced switching between left- and right-handed circular polarization interactions at terahertz frequencies.

The nanometre length scale of plasmonic structures leads to vibrational dynamics at high frequencies, which could be exploited for sensitive optical detectors. O'Brien et al. show that they can detect spatial properties of phonon modes in multimodal plasmonic structures, revealing complex nanomechanical dynamics.

The spin Hall effect of light allows precise identification of unknown interface parameters, yet its measurement has previously required multiple steps. Here, the authors introduce a metasurface-enabled, single-shot, real-time measurement method.

A high density of “accordion-like” silver nanorod array over a large area (~cm²) was fabricated by confining lamellar-forming polystyrene-block-poly (methyl methacrylate) copolymer (PS-b-PMMA) inside cylindrical pores of aluminum oxide (AAO) template grafted by thin neutral brush layers. After removing the AAO template, a 5 nm thick layer of silver was thermally deposited on only PS nanodomains. Owing to combination of hemispherical head and side silver rings, multiple resonances exhibited in the visible and NIR regimes. This sophisticated fabrication utilizing block copolymer self-assembly could be applied to multi-analyte detection and realization of large-scale metamaterials working at visible and NIR wavelengths.

Using a topological inverse design process with finite-difference time-___domain simulations, the authors fabricate high-numerical-aperture red, green and blue achromatic metalenses for compact near-eye displays using a scalable roll-to-plate technique.

Researchers report a three-dimensional metal–dielectric optical cavity with an ultrahigh optical index of 17.4. The resonant frequency of the cavity is constant and independent of its size. This unique property could be used to provide significant enhancements to a broad range of light–matter interactions.

Sampling is a key for metasurface design but causes aliasing at high numerical apertures or short wavelengths. The authors identify appropriateness of the Nyquist criterion and propose anti-aliasing strategies for metasurface design.

Natural hyperbolic materials hybridized with nanostructures provide deep-subwavelength-scale confinement of an electromagnetic field.

Current metalenses are far from commercialization due to fabrication cost and low throughput. Here, the authors use a UV-curable resin as a matrix for direct pattern replication by the composite and TiO2 nanoparticles to increase the refractive index of the composite, allowing dielectric metalenses to be manufactured in a single step.

Humidity sensitive structural colour has potential in visualisation technologies, but display of multiple images with the same material is challenging. Here, the authors report a photoreactive polymer to prepare transformational devices that respond to humidity changes.

Weather-dependent energies are sensitive to weather and geographical conditions. Here, authors propose an all-weather sustainable device integrating a triboelectric nanogenerator and radiative cooler, enabling energy harvesting from rain and saving energy on a sunny day.

Food packaging is an important environmental concern and susceptible to counterfeit-prone labelling. This study presents a newly developed water-soluble food label using nanocomposite ink that addresses these issues.

Achieving a wide angular response in single layer acoustic metalenses is challenging. By leveraging perfect acoustic symmetry conversion, the authors realize an aberration free metalens with a wide field-of-hearing, up to 140 degrees.

Nonlinear scattering theory, contrary to Miller’s rule, is shown to be able to establish the nonlinear optical response of metamaterials, a tool that can be used towards the efficient design of strongly nonlinear metamaterials.

The ultrabroadband absorptive refractory plasmonics is demonstrated with TiN and TiO₂ deposited onto an anodized aluminum oxide template. The absorber shows ultrabroadband absorption in the solar spectrum (400–2500 nm). Furthermore, the absorber shows an extended hot carrier lifetime and improved efficiency of photocatalytic hydrogen production. This novel ultrabroadband absorber has great potential to provide a sustainable and cost-effective route for hydrogen generation from solar energy.

The requirement for sophisticated objective lenses hinders the miniaturisation of single molecule fluorescence spectroscopy for portable sensing applications. Here, the authors demonstrate a dual-wavelength metalens for real-time monitoring of individual fluorescent nanoparticles.

The application of chiral metamaterials is limited by the fabrication of large-area chiral plasmonic structures with high dissymmetry factors. Here, the authors overcome this limitation imparting extrinsic chirality to hierarchical nanostructured polymer substrates with application in quantum and security enhanced optical communications.

Facile nanostamping of the high-refractive index nanoparticle-embedded-resin for the direct fabrication of highly efficient metaholographic devices down to the deep-ultraviolet region.

The authors propose a method for the scalable manufacturing of metalenses using deep-ultraviolet argon fluoride immersion lithography and wafer-scale nanoimprint lithography, opening a route towards their low-cost, high-throughput mass production.

The authors fabricate a 3D achromatic diffractive metalens on the end face of a single-mode fiber, useful for endoscopic applications. They demonstrate achromatic and polarization insensitive focusing across the entire near-infrared telecommunication wavelength band ranging from 1.25 to 1.65 µm.

PVA is a hydrogel that has attractive swelling properties for use in tunable photonic applications. Here, the authors exploit PVA with nanoimprint lithography to realize multiplexed optical encryption metasurfaces to display, hide, and destroy encrypted information.

3D depth sensing with structured light enables simultaneous imaging of multiple objects, but has limited field of view and low efficiency. Here, the authors demonstrate 3D imaging with scattered light from a metasurface composed of periodic supercells, covering a 180° field of view with a high-density dot array.

A complex-amplitude metasurface hologram is conceptually designed and three-dimensionally printed. The device allows for high-bandwidth orbital angular momentum multiplexing holography and holographic video displays.

A 3D-printing strategy involving jets of charged aerosol particles guided by electric-field lines allows direct deposition of various metal nanostructures, including helices, letters and vertical split-ring resonator structures.

The authors present a bi-functional metasurface, combining structural color printing observed under white light and polarization encoded It is appropriate. vectorial holography. A pixelated design is used encode multiple holographic images, and they demonstrate an electrically tunable optical security platform.