Nanophotonic devices enabled by aluminum plasmonics are saliently advantageous in terms of their low cost, outstanding sustainability, and affordable volume production. We report, for the first time, based highly transmissive polarization-independent subtractive color filters, which fabricated just with single step electron-beam lithography. The filters feature selective suppression transmission spectra, is realized combining propagating nonpropagating surface plasmons mediated an array...

Abstract It is advantageous to construct a dielectric metasurface in silicon due its compatibility with cost-effective, mature processes for complementary metal-oxide-semiconductor devices. However, high-quality crystalline-silicon films are difficult grow on foreign substrates. In this work, we propose and realize highly efficient structural color filters based exploiting hydrogenated amorphous (a-Si:H), known be lossy the visible regime. The comprised of an array a-Si:H nanodisks embedded...

We present a highly efficient omnidirectional color filter that takes advantage of an Ag-TiO2-Ag nano-resonator integrated with phase-compensating TiO2 overlay. The dielectric overlay substantially improves the angular sensitivity by appropriately compensating for phase pertaining to structure and suppresses unwanted optical reflection so as elevate transmission efficiency. is thoroughly designed, it analyzed in terms its reflection, admittance, shift, thereby highlighting origin resonance...

Abstract Nanostructured spectral filters enabling dynamic color-tuning are saliently attractive for implementing ultra-compact color displays and imaging devices. Realization of polarization-induced via one-dimensional periodic nanostructures is highly challenging due to the absence plasmonic resonances transverse-electric polarization. Here we demonstrate efficient subtractive incorporating a dielectric-loaded aluminum nanowire array, providing continuum customized according incident...

We describe the direct preparation of crystalline Ni3S2 thin films via atomic layer deposition (ALD) techniques at temperatures as low 250 °C without postthermal treatments. A new ALD chemistry is proposed using bis(1-dimethylamino-2-methyl-2-butoxy) nickel(II) [Ni(dmamb)2] and H2S precursors. Homogeneous conformal depositions were achieved on 4 in. wafers (both metal oxide substrates, including Au SiO2). The resulting layers exhibited highly efficient stable performance electrocatalysts for...

Kwangwoon UniversityDepartment of Electronic Engineering447-1, Wolge-Dong, Nowon-GuSeoul 139-701South KoreaAbstract. We propose a new optical image encryption technique basedon exclusive-OR (XOR) operations for security system that controls theentrance authorized persons. The basic idea is we convert agray-level to eight bit planes encryption. use theXOR operation commonly used such as the well-known encryp-tion method. input encrypted by performing XORoperations with key stream are...

Significant progress has been achieved in improving the power conversion efficiency (PCE) of perovskite solar cells (PSCs) for a decade, but long-term stability is still underdeveloped. In regular PSC structure, 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)9,9′-spirobifluorene (Spiro-OMeTAD) with Li additives and metal electrodes are widely adopted, which leads to facile degradation under device operating conditions because ion migration. Herein, we show an interface-engineered...

Highly efficient subtractive tri-color filters of cyan, magenta, and yellow with enhanced color purity robustness have been proposed realized, by exploiting a silicon-aluminum (Si-Al) hybrid-nanodisk (ND) metasurface atop Si substrate. The aspect ratio the Si-Al hybrid ND is much lower than that conventional nanowire, which disadvantageous due to its fragility low purity. In response incident light impinging upon metasurface, hybrid-NDs individually play role in exciting magnetic dipole (MD)...

In this paper, a new computational reconstruction technique for three-dimensional (3-D) objects in integral imaging using lenslet array is proposed and its usefulness discussed. Experimental results show that improves the visual quality of 3-D reconstructed image when compared with conventional technique.

We have demonstrated a highly efficient electrically tunable color filter, which provides precise control of output, taking advantage nano-photonic polarization-tailored dichroic resonator combined with liquid-crystal based polarization rotator. The visible on the guided mode resonance, incorporates planar dielectric waveguide in Si3N4 integrated an asymmetric two-dimensional subwavelength Al grating unequal pitches along its principal axes, exhibited specific transmission featuring high...

Abstract Nanostructure based color filtering has been considered an attractive replacement for current colorant pigmentation in the display technologies, view of its increased efficiencies, ease fabrication and eco-friendliness. For such structural filtering, iridescence relevant to angular dependency, which poses a detrimental barrier practical development high performance sensing devices, should be mitigated. We report on non-iridescent transmissive filter, fabricated large area 76.2 ×...

A novel approach to extract the depth data of 3D objects in space by using computational integral imaging reconstruction (CIIR) technique is proposed. With elemental images captured CCD camera through a pinhole array, depth-dependent object can be reconstructed on output plane CIIR technique. Only planes where were located are clearly focused; so extracted discriminating these focused from others an image separation feasibility test proposed CIIR-based extraction method carried out, and its...

Creating and manipulating materials at the nanoscale with controllable size, shape nucleation site is an important task to meet urgent demands for quantum structures designed properties. In last ten years, droplet epitaxy has been emerging as a versatile fabrication method various complex nanostructures, such dots, rings, double-rings, so on. However, there lack of understanding deep nanohole formation based on high substrate temperature. Here we fabricate self-organized GaAs nanoholes by Ga...

For conventional phase-gradient metasurfaces, the phase tuning is mostly fulfilled by exploitation of a nanoantenna- or Pancharatnam–Berry-phase-based nanoresonator. The former scheme typically suffers from dispersive gradient, while latter dispersionless yet functions only for circularly polarized light. precise reproduction such sophisticated nanoscale structures, which essential applications in color printing, displays, and image sensing, especially challenging visible band. In this work,...

Perovskite solar cells (PSCs) have attracted tremendous interest due to their outstanding intrinsic photovoltaic properties, such as absorption coefficients, exciton binding energies, and long carrier lifetimes. Although the power conversion efficiency (PCE) of PSCs is close Si cells' PCE, device stability remains a challenge. In particular, more critical in n-i-p normal structured PSCs, which show higher than p-i-n inverted ones, simply because much lower...

A new integral imaging (II) system that can magnify 3D reconstructed images by employing an intermediate-view reconstruction technique (IVRT) is proposed in which the number of elemental obtained from a one-step pickup process be computationally increased use IVRT without mechanical movement and long multistep process. To show feasibility II system, some optical experiments on magnification with real object have been carried out results are presented.

We have implemented experimental code to compute a compensated phase-added stereogram (CPAS), which was proposed in previous paper, on graphic processing unit (GPU). In this we show an acceleration method for CPAS computation by means of the GPU and compare time between CPU-based GPU-based calculations, are programmed our laboratories. addition, demonstrate their reconstructed images. As result, could achieve performance gain factor over 33 compared with computing environment digital...

A new robust MPEG-based novel look-up table (MPEG-NLUT) is proposed for accelerated computation of video holograms fast-moving three-dimensional (3-D) objects in space. Here, the input 3-D frames are sequentially grouped into sets four, which first and remaining three each set become reference (RF) general (GFs). Then, frame images divided blocks, from motion vectors estimated between RF GFs, with these vectors, object motions all blocks compensated. Subsequently, only difference...

We investigate the effect of annealing temperature on self-assembled Au droplets Si (111). The is systematically varied while fixing other growth parameters such as deposition amount and duration clearly to observe effect. Self-assembled are fabricated by from 50°C 850°C with 2-nm for 30 s. With increased temperatures, show gradually height diameter density progressively decreases. fine uniformity can be between 550°C 800°C. While become much larger amount, extended only mildly affects...

We describe the direct formation of mixed-phase (1T and 2H) MoS2 layers on Si as a photocathode via atomic layer deposition (ALD) for application in photoelectrochemical (PEC) reduction water to hydrogen. Without typical series-metal interfaces between MoS2, our p-Si/SiOx/MoS2 showed efficient stable operation hydrogen evolution reactions (HERs). The resulting performance could be explained by spatially genuine device architectures three dimensions (i.e., laterally homo vertically...

Photoelectrochemical production of hydrogen by using sunlight to split water offers a sustainable approach for clean energy generation.

α-Fe2O3 is considered as one of the most suitable materials for photoelectrochemical (PEC) water oxidation due to its appropriate band gap energy, positions, and abundance. However, short hole diffusion length (2–4 nm) a long-term problem be solved. Here, core–shell-structured ultrathin on mesoporous WO3 photoanode was fabricated by atomic layer deposition (ALD) achieve minimal charge recombination, which main reason lower PEC performance α-Fe2O3. A facile drop-casting method adopted produce...