Abstract Integral imaging (II) display, one of the most critical true-3D display technologies, has received increasing research recently. Significantly, an achromatic metalens array realized a broadband metalens-array-based II (meta-II). However, past micro-scale arrays were incompatible with commercial micro-displays; furthermore, elemental image (EIA) rendering is always slow. The two hinders in device and algorithm prevent meta-II from being used for practical video-rate near-eye displays...

Viewing angle enlargement is essential for SLM-based 3D holographic display. An idea of constructing equivalent-curved-SLM-array (ECSA) proposed by linear phase factor superimposition. Employing the time division and spatial tiling (TDST) techniques, an ECSA-based horizontal 4f optical system designed built. The viewing a single SLM increased to 3.6 times when retaining same hologram area. interlaced display technique developed remove flicker effect. Holographic augmented reality performed...

High performance and cost-effective solar absorbers are crucial for various optical applications, such as collection thermophotovoltaic devices. This study designs experimentally demonstrates a wide-angle broadband absorber. The proposed absorber is composed of tapered polyimide substrate Al-Cr-SiO 2 -Cr-SiO thin-film based on the interference multilayer thin film excited magnetic resonance light-trapping structures. composite process colloidal lithography method magnetron sputtering...

Abstract Metamaterial absorbers over a broadband spectrum with high absorption, good angular tolerance, and easy configurations have essential importance for optical optoelectronic devices. In this study, hybrid metamaterial absorber comprising multilayered cermet thin films (multi-cermet) tapered structure is designed experimentally demonstrated. Combining interference of multi-cermet field localization nano-cone structures, the average absorbance both simulation measurement are more than...

Microendoscopes are vital for disease detection and clinical diagnosis. The essential issue microendoscopes is to achieve minimally invasive high-resolution observations of soft tissue structures inside deep body cavities. Obviously, the microscope objective a must with capabilities both high lateral resolution in wide field view (FOV) miniaturization size. Here, we propose meta-objective, i.e., based on cascaded metalenses. two metalenses, optical diameters 400 μm 180 μm, respectively,...

This work presents an optically tunable chirped fiber Bragg grating (CFBG). The CFBG is obtained by a side-polished (SPFBG) whose thickness of the residual cladding layer in polished area (D(RC)) varies with position along length grating, which coated photoresponsive liquid crystal (LC) overlay. reflection spectrum tuned refractive index (RI) modulation, comes from phase transition overlaid LC under ultraviolet (UV) light irradiation. broadening and corresponding shift central wavelength are...

The potential for use of staggered structures to provide optical broadband angular selectivity is proposed and verified. numerical results show that the performance characteristics, including range angular-selective region full width at half maximum (FWHM) passband, can be tuned by adjusting stagger parameter number cells compose structure. Therefore, a detailed procedure given design an filter based on structure with desired FWHM. Finally, confirm feasibility fabrication designed...

Quality of holographic reconstruction image is seriously affected by undesirable messy fringes in polygon-based computer generated holography. Here, several methods have been proposed to improve the quality, including a modified encoding method based on spatial-domain Fraunhofer diffraction and specific LED light source. Fast Fourier transform applied basic element polygon fringe-invisible achieved after introducing initial random phase. Furthermore, we find that with satisfactory fidelity...

Abstract Structural color fabrication attracting significant interest for science and art is usually restricted by costly time‐consuming structuring processes or inerasable characteristics of structures. Herein, developing a universal, low‐cost technical solution—the nanosecond laser irradiation ink (Solvent Black 7) layers coated on metal—laser‐induced heterogeneous permanent/erasable nanostructures (LIHPEN) are produced successfully multiple metals, especially noble without ablation damage...

Hardware architecture of parallel computation is proposed for generating Fraunhofer computer-generated holograms (CGHs). A pipeline-based integrated circuit realized by employing the modified analytical formulism, which large scale and enables all components to be concurrently operated. The CGH contains five modules calculate initial parameters amplitude, amplitude compensation, phases, phase respectively. precalculator fully adopted considering “reusable design” concept. Each complex...

An intelligent and monolithic integration of optical power splitter with optically switchable cross-connect has been proposed. It is fabricated on the multimode interference principle in Si-based SiGe material system configured for a 3×2 symmetrical structure three input waveguides two output waveguides. The central waveguide section based incorporated an activated carrier injection element. operating wavelengths device are specially designed 1545, 1550, 1555nm conventional-band wavelengths....

Based on the theory of optical fiber coupling and Fabry–Perot interference, a model extrinsic interferometric (EFPI) sensor for measuring strain is analyzed, theoretical demonstrated. A formula white-light interfered EFPI obtained. The system designed using an LED source as light to obtain reflected spectrum. experimental results show that it coincides well with computational simulation model, which means accurate.

We developed a method to fabricate an array of silver non-planar nano-arc-gaps via inverted hemispherical colloidal lithography and shadow metal evaporation methods. It is found that there localized surface plasmon mode which results in extraordinary optical transmission. The electric field strongly at the nano-arc-gap region therefore induces resonance has ultra-small volume less than 2.44 × 10−6 μm3. ratio quality factor as high 1.44 106 μm−3. This would be valuable for design optoelectric...