Diffractive optical neural networks (DONNs) have exhibited the advantages of parallelization, high speed, and low consumption. However, existing DONNs based on free-space diffractive elements are bulky unsteady. In this study, we propose a planar-waveguide integrated network chip architecture. The three layers engraved same side quartz wafer. three-layer is designed with 32-mm3 processing space enables computing speed 3.1×109 Tera operations per second. results show that proposed achieves...

The first rotameric monoterpenoid indole alkaloids (MIAs), 1a and 1b, two unusual dimeric MIAs, 2 3, with new dimerization patterns, together their putative biosynthetic intermediates 4–7, were isolated from the roots of Gelsemium elegans. Compounds 3 represent natural aromatic azo- urea-linked respectively. Their structures absolute configurations elucidated by means NMR spectroscopy, single-crystal X-ray diffraction, electronic circular dichroism data analyses. interconverting mechanism...

A novel, to the best of our knowledge, liquid crystal (LC) biosensor, based on an optical fiber Mach-Zehnder interferometer (MZI), is proposed. The proposed MZI consists two single-mode fibers and a tapered photonic (PCF). PCF coated with 4'-pentyl-biphenyl-4-carboxylic acid (PBA)-doped 4-cyano-4'-pentylbiphenyl (5CB). Being pH-sensitive material, PBA can manipulate LC molecules different orientations according their pH values. When orientation changes varying pH, effective refractive index...

Recently, the transparent electromagnetic interference (EMI) shielding film, which is optical transparent, conductive, and EMI shielding, widely employed in fields of display, solar cell, so on. Here, we utilized Voronoi diagram randomized metallic mesh 3D printing technology to achieve on curved surface. For metal grid based diagram, one can realize highly homogeneous light transmission, with that performance superior regular random quadrilateral mesh. The designed meshes were fabricated...

Graphite-like carbon nitride (g-C3N4) has attracted much attention due to its peculiar photocatalytic performance as a visible-light-responsive photocatalyst. However, insufficient sunlight absorption is not conducive the activity of g-C3N4. Herein, by using first-principles density functional theory (DFT) calculations, we demonstrated simple yet efficient way achieve improvement monolayer g-C3N4 via surface charge transfer doping (SCTD) electron-drawing tetracyanoquinodimethane (TCNQ) and...

This Letter proposes and demonstrates a novel, miniature fiber-tip temperature sensor with tapered hollow capillary tube (HCT) filled glycerin dye-doped cholesteric liquid crystal (CLC). The function of is to provide surface anchoring force control the uniform orientation CLC molecules, so that in HCT can be considered as mirrorless photonic bandgap (PBG) microcavity. An unambiguously identifiable PBG mode single peak appears emission spectra sensor. CLC-based has sensitivity <mml:math...

A Fabry-Perot interferometer displacement sensor is proposed and demonstrated. This prepared by inserting two ceramic ferrules into a polydimethylsiloxane (PDMS) hose to generate cavity. The cavity filled with nematic liquid crystals (NLCs), which induce Vernier effect due the birefringence of NLCs. flexible PDMS makes length adjustable. sensitivity ∼2.97 nm/μm dynamic range 0.9 mm at center wavelength 1550 nm experimentally

Enhanced visible light absorption performance of monolayer SnS₂and SnSe₂<italic>via</italic>surface charge transfer doping (SCTD).

The effect of the Al content on microstructure and mechanical behaviour Mg–8Li– xAl–0.5Ca alloys is investigated. experimental results show that an as-cast Mg–8Li–0.5Ca alloy mainly composed α-Mg, β-Li granular Mg 2 Ca phases. With addition Al, amount α-Mg phase first increases then decreases. In addition, intermetallic compounds also obviously change. test refined due to dynamic recrystallisation occurs during extrusion. properties extruded are much more desirable than alloys. as-extruded...

External temperature variations inevitably affect the accuracy of a liquid crystal sensor. Therefore, we propose novel temperature-compensated fiber volatile organic compound (VOC, using acetone as model compound) gas The proposed sensor consists short segment hollow-core (HCF), which is spliced on multimode fiber. Cholesteric (CLC) sealed into HCF to sense temperature, and another type CLC coated end face for VOC detection. concentration ambient can be simultaneously measured by monitoring...

This paper demonstrates a thermally and electrically tunable hollow glass microsphere resonant cavity filled with dye-doped nematic liquid crystal. We controlled the orientation of in-sphere crystal encapsulated it polydimethylsiloxane film. The typical whispering gallery modes (WGMs) lasing spectra were obtained under pulsed laser pump effects temperature electric field on peaks wavelengths studied. WGM present blueshift significantly increasing due to decrease in effective refractive index.

This letter reports the optical pumped lasing behaviours of a three-layer Bragg resonance cavity consisting dye-doped cholesteric liquid crystal (DDCLC) microdroplet, polyglycerol-2 and hollow glass microsphere. The function PG2 is to control parallel anchoring (LC) molecules on surface LC microdroplet. whispering-gallery mode (WGM), radial (photonic bandgap, PBG) WGM (BWGM) are observed in DDCLC microspheres with different helical pitches refractive indices. formation mechanisms six types...

Graphite-like C3N4 (g-C3N4) is an efficient visible-light-driven photocatalyst which commonly used in pollutant degradation. The photoreactivity of g-C3N4 depends on the preparation conditions to a large extent. In this work, we linked its stability and photocatalytic activity through dye photodegradation experiments sensitivity mathematical analyses. analyses show that effect calcination temperature more significant than time g-C3N4. optimized rhodamine B (RhB) degradation under visible...

This letter reports a thermally tunable and electrically switchable three-layer 3D Bragg resonance cavity consisting of dye-doped cholesteric-liquid-crystal (DDCLC) microdroplet, polyglycerol-2 hollow-glass-microsphere (HGM). The whispering-gallery-mode photonic bandgap mode can be controlled by varying the CLC refractive indices in HGM. effects temperature electric field on peaks wavelengths were studied. study results present prospect output microlaser such solid shell DDCLC microsphere...

Metasurface is a new type of micro-optical element developed in recent years. It can intelligently modulate electromagnetic waves by adjusting the geometrical parameters and arrangement dielectric structures. In this paper, bifocal metalens based on modulation propagation phase was designed for potential application displacement measurement. The lens optical holography-like method, which verified scalar diffraction theory. We square aperture with side length 200

Abstract Optical computing has been proven to have the ability process information with ultra‐high speed. Here, an all‐optical feature extraction system via sparse representation (AFE‐SR) is introduced. The AFE‐SR, which achieved by multiple diffractive optical elements (DOEs), can realize recognition of generated physical fields speed light. simplifies target and improves accuracy. With mathematical analysis principle features integration, identification accuracy generation 100% in 2100...

Abstract Background Recently, the application of interdisciplinary research methods to sports performance analysis has become a clear trend. These can enhance analytical techniques and provide deeper understanding matching outcome. Purpose This study aimed develop validate predictive model predict match outcomes by transferring an technique common modern medicine analysis. We would like identify whether are applicable predicting based on historical data what factors may affect Methods A...

Fresnel zone plates (FZPs), which is lighter and smaller than the refractive lens, can achieve constructive interference at center of focal plane. To redistribute on-axis intensity, modified FZPs based on ring optimization combination have been achieved to extend depth focus (DOF) multiple spots. Furthermore, metasurface FZP utilizing meta-atom's anisotropic response proposed these functions. However, it unsolved realize mentioned functions optimized polarization distribution while incident...