Abstract Although additives are widely used in aqueous electrolytes to inhibit the formation of dendrites and hydrogen evolution reactions on Zn anodes, there is a lack rational design principles systematic mechanistic studies how select suitable additive regulate reversible plating/stripping chemistry. Here, using saccharides as representatives, we reveal that electrostatic polarity non‐sacrificial critical descriptor for their ability stabilize anodes. Non‐sacrificial found continuously...

We propose a low-profile broadband planar circularly polarized folded transmitarray antenna (CPFTA) based on well-designed top and bottom metasurfaces (MSs). The MS is employed to reflect the x-polarized wave as ground and, at same time, convert y-polarized into waves with arbitrary phase shifts in operation band. A applied incident twist its polarization by 90°. whole CPFTA, including feeding source of microstrip antenna, MSs can be fully integrated fabricated using low-cost printed circuit...

A zone plate lens utilizing a refractive instead of diffractive approach is presented for broadband operation. By transformation optics, we compress the conventional hyperbolic into flat one with few plates made all-dielectric materials. Such transformed maintains performance original lens, thus providing superior alternative to Fresnel element which inherently narrow band.

A broadband artificial material composed of non-resonant parallel-line unit cells is proposed to enhance the gain an antipodal tapered slot antenna (ATSA). The material, whose effective refractive index lower than that substrate on which printed, will act as a regular lens in beam focusing. In order investigate enhancement effect combination with ATSA made by locating front antenna. Simulation results indicate has been enhanced significantly and increasing dimension radiation direction leads...

The fabrication of tilted fiber Bragg gratings (TFBGs) in non-photosensitized single-mode by infrared femtosecond (fs) laser is reported for the first time to best our knowledge. grating structure obtained focusing pulses through a phase mask into positioned sample, which moving along with interference fringe form region covering entire core and partial cladding. A reflective probe based on TFBG gold mirror sputtered one end has been fabricated its maximum refractive index (RI) sensitivity...

We numerically and experimentally demonstrate quasi-bound states in the continuum (BICs) free-standing metal complementary periodic cross-shaped resonators (CPCRs) at terahertz frequencies. Such induced quasi-BICs arise from broken symmetry CPCRs. By slightly breaking mirror through reducing length of one arm CPCRs, measured <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>Q</mml:mi> </mml:math> -factor quasi-BIC can reach 102, which is significantly high...

Using anisotropic holographic metasurfaces to transform the creeping waves into circularly polarized (CP) beams has initiated quest for tangible applications in different disciplines. However, present designs are only limited planar impedance surfaces with rare studies concerning linear-to-circular polarization converting metasurface over conformal platforms. In this article, we demonstrate perfect transformation of linearly (LP) surface CP through cylindrical consisting gradient H-shaped...

We report the coupling of photons from an optical fiber taper to surface plasmon modes silver nanowires. The launch propagating plasmons can be realized not only at ends nanowires, but also midsection. degree controlled by adjusting light polarization. In addition, we present into multiple nanowires a single simultaneously. Our demonstration offers novel method for optimizing nanoscale metallic waveguides and promotes realization highly integrated plasmonic devices.

A conventional parabolic reflector is converted into a flat one based on the discrete coordinate transformation. Instead of general beam-steering techniques, such as off-axis feeding, tilting feed/reflector, or utilizing phase shift, we show an alternative way to manipulate reflected emission through tuning transformed dielectrics. The proposed design, only including dielectric components, has merit keeping profile compact system while possessing ability steer radiation beams in wide frequency band.

A highly sensitive temperature sensor based on the liquid-sealed S fiber taper (SFT) in a capillary is proposed and experimentally demonstrated. The independent SFT turned into by thermo-optic effect of RI liquid thermal expansion sealant. total length device 10 mm, which can be further shortened to 1 mm if necessary. sensing mechanism analyzed detail experimental results show sensitivity reaches as high -1.403 nm/°C. contributions from different mechanisms are also obtained experimentally.

Measurement of the local temperature in transparent materials irradiated by femtosecond laser pulses is important for deep insight into light-matter interaction physics and proper micronanomachining, which is, however, technically challenging. We solve problem this paper using a laser-written fiber Bragg grating that can stably work up to 1000 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">°</sup> C as high-sensitivity sensor monitor thermal...

A new class of dielectric sheet antennas is presented based on transformation optics. Specifically, we successfully implement the with a consideration surface wave eigenmode properties, and carry out practical perforated design by drilling holes to synthesize required constants for their potential realization. The full simulation shows that our lens antenna capable obtaining greatly improved directivity, while maintaining original low profile.

In this paper, we study two surface wave control scenarios at microwave frequencies. The first is a traveling along an uneven interface with triangular obstruction present on grounded dielectric slab. other that circumvents metallic rhombus-shaped obstacle, which partially buried in flat With consideration of the eigenmode properties wave, our proposed technique - based transformation optics offers efficient and accurate way to perform filed manipulation. On one hand, see guided no...

Multifocal spots in high numerical-aperture (NA) objectives has emerged as a rapid, parallel, and multi-location method multitude of applications. However, the typical used for forming three-dimensional (3D) multifocal based on iterative algorithms limits potential We demonstrate non-iterative using annular subzone phases (ASPs) that are composed many subareas which phase-only distributions with different 3D displacements filled. The dynamic controllable position each focal spot volume...

Abstract Although additives are widely used in aqueous electrolytes to inhibit the formation of dendrites and hydrogen evolution reactions on Zn anodes, there is a lack rational design principles systematic mechanistic studies how select suitable additive regulate reversible plating/stripping chemistry. Here, using saccharides as representatives, we reveal that electrostatic polarity non‐sacrificial critical descriptor for their ability stabilize anodes. Non‐sacrificial found continuously...

To investigate the association between thyroid functions and oral microbiome diversity.Data from US National Health Nutrition Examination Survey (NHANES; 2009-2012) were analyzed. Thyroid defined using hormones related biomarkers. Oral was measured observed number of amplicon sequence variants (ASVs) Bray-Curtis dissimilarity. Linear regression used to estimate average change (β) 95% CI for ASVs against functions, adjusted sociodemographic variables, health conditions, urinary iodine status,...