Broadband spin and angle co-multiplexed waveguide-based metasurface for six-channel crosstalk-free holographic projection

eLight, Journal Year: 2024, Volume and Issue: 4(1)

Published: May 29, 2024

Abstract Metasurface-based holograms, or metaholograms, offer unique advantages including enhanced imaging quality, expanded field of view, compact system size, and broad operational bandwidth. Multi-channel capable switching between multiple projected images based on the properties illuminating light such as state polarization angle incidence, have emerged a promising solution for realizing switchable dynamic holographic displays. Yet, existing designs typically grapple with challenges limited multiplexing channels unwanted crosstalk, which severely constrain their practical use. Here, we present new type waveguide-based multi-channel support six independent fully crosstalk-free display channels, simultaneously multiplexed by spin guided incident within glass waveguide. We employ k -space translation strategy that allows each distinct target to be selectively translated from evanescent-wave region center propagation-wave into free space without when metahologram is under illumination specific azimuthal angle. In addition, tailoring encoded images, implement three-channel polarization-independent two-channel full-color (RGB) metahologram. Moreover, number can further increased expanding -space’s central-period combing other techniques orbital angular momentum multiplexing. Our work provides novel approach towards realization high-performance optical elements substantial information capacity, opening avenues applications in AR/VR displays, image encryption, storage.

Language: Английский

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The Road to Commercializing Optical Metasurfaces: Current Challenges and Future Directions

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Optical metasurfaces, components composed of artificial nanostructures, are recognized for pushing boundaries wavefront manipulation while maintaining a lightweight, compact design that surpasses conventional optics. Such advantages align with the current trends in optical systems, which demand communication devices and immersive holographic projectors, driving significant investment from industry. Although interest commercialization metasurfaces has steadily grown since initial breakthrough diffraction-limited focusing, their practical applications have remained limited by challenges such as, massive-production yield, absence standardized evaluation methods, constrained methodology. Here, this Perspective addresses particularly focused on mass production, fabrication tolerance, performance evaluation, integration into commercial systems. Additionally, we select fields where may soon play roles provide perspective potentials. By addressing exploring solutions, aims to foster discussions will accelerate utilization further build near-future metaphotonics platforms.

Language: Английский

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Single-Step Fabricable Flexible Metadisplays for Sensitive Chemical/Biomedical Packaging Security and Beyond

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(27), P. 31194 - 31202

Published: July 1, 2022

Secure packaging and transportation of light-sensitive chemical biomedical test tubes are crucial for environmental protection public health. Benefiting from the compact form factor high efficiency optical metasurfaces, we propose a broad-band polarization-insensitive flexible metasurface security sensitive packages in transport industry. We employ both propagation geometric phase novel TiO2 resin-based anisotropic nanoresonators to demonstrate visible domain. The ultraviolet nanoimprint lithographic technique (UV-NIL) is used fabricate high-index nanoparticle-embedded-resin (nano-PER) structures that patterned on substrate. This approach provides swift single-step fabrication without secondary steps such as deposition etching. Moreover, replicating transforming patterns over substrates make proposed highly suitable large-throughput commercial manufacturing. As metahologram manifests transmission domain, metaholographic platforms could find several exciting applications bendable/curved displays, wearable devices, holographic labeling interactive displays.

Language: Английский

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Time-sequential color code division multiplexing holographic display with metasurface

Opto-Electronic Advances, Journal Year: 2022, Volume and Issue: 6(8), P. 220060 - 220060

Published: Nov. 3, 2022

Color metasurface holograms are powerful and versatile platforms for modulating the amplitude, phase, polarization, other properties of light at multiple operating wavelengths. However, current color holography can only realize static manipulation. In this study, we propose demonstrate a multiplexing technique combined with multiwavelength code-division (CDM) to dynamic Multicolor code references utilized record information within single increase capacity security anti-cracks. A total 48 monochrome images consisting pure characters multilevel video frames were reconstructed in dual polarization channels birefringent exhibit high density, was displayed via sequential illumination corresponding patterns verify ability Our approach demonstrates significant application potential optical data storage, encryption, multiwavelength-versatile diffractive elements, stimulated emission depletion microscopy.

Language: Английский

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Active and tunable nanophotonic metamaterials

Nanophotonics, Journal Year: 2022, Volume and Issue: 11(17), P. 3769 - 3803

Published: Aug. 16, 2022

Abstract Metamaterials enable subwavelength tailoring of light–matter interactions, driving fundamental discoveries which fuel novel applications in areas ranging from compressed sensing to quantum engineering. Importantly, the metallic and dielectric resonators static metamaterials are comprised present an open architecture amenable materials integration. Thus, incorporating responsive such as semiconductors, liquid crystals, phase-change materials, or (e.g., superconductors, 2D etc.) imbue with dynamic properties, facilitating development active tunable devices harboring enhanced even entirely electromagnetic functionality. Ultimately, control derives ability craft local fields; accomplished using a host external stimuli modify electronic optical properties embedded into regions resonators. We provide broad overview this frontier area research, introducing concepts presenting strategies that include electronic, optical, mechanical, thermal, magnetic stimuli. The examples presented range microwave visible wavelengths, utilizing wide realize spatial light modulators, effective nonlinear media, on-demand optics, polarimetric imaging but few examples. Often, nanophotonic yield emergent response is more than sum parts, providing reconfigurable real-time amplitude, phase, wavevector, polarization, frequency light. date impressive, setting stage for future advances likely impact holography, beyond 5G communications, imaging, transduction.

Language: Английский

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Humidity‐Responsive RGB‐Pixels via Swelling of 3D Nanoimprinted Polyvinyl Alcohol

Advanced Science, Journal Year: 2022, Volume and Issue: 10(2)

Published: Nov. 14, 2022

Abstract Humidity‐responsive structural coloration is actively investigated to realize real‐time humidity sensors for applications in smart farming, food storage, and healthcare management. Here, humidity‐tunable nano pixels are with a 700 nm resolution that demonstrates full standard RGB (sRGB) gamut coverage millisecond‐response time. The color designed as Fabry–Pérot (F–P) etalons which consist of an aluminum mirror substrate, humidity‐responsive polyvinyl alcohol (PVA) spacer, top layer disordered silver nanoparticles (NPs). measured volume change the PVA reaches up 62.5% when relative (RH) manipulated from 20 90%. NP permits penetration water molecules into layer, enhancing speed absorption swelling down millisecond level. Based on response hydrogel‐based F–P high‐throughput 3D nanoimprint technique, high‐resolution multicolored print can have potential display technologies optical encryption, demonstrated.

Language: Английский

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Recent advancements of metalenses for functional imaging

Nano Convergence, Journal Year: 2023, Volume and Issue: 10(1)

Published: May 24, 2023

Abstract Metasurfaces can modulate light with periodically arranged subwavelength scatterers, and they generate arbitrary wavefronts. Therefore, be used to realize various optical components. In particular, metasurfaces lenses, so-called metalenses. the last decade, metalenses have been actively studied developed. this review, we firstly introduce fundamental principles of in terms materials, phase modulation method, design method. Based on these principles, functionalities applications consequently realized. Metalenses a much larger number degrees freedom compared that existing refractive or diffractive lenses. Thus, afford such as tunability, high numerical aperture, aberration correction. applied systems imaging spectrometers. Finally, discuss future Graphical

Language: Английский

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Stimuli‐responsive active materials for dynamic control of light field

Deleted Journal, Journal Year: 2023, Volume and Issue: 1(2)

Published: Oct. 19, 2023

Abstract The increasing demand for the multidimensional and dynamic control of light has spurred development stimuli‐responsive, reconfigurable, programmable optical systems. Liquid crystals (LCs), which combine liquid‐like stimuli‐responsiveness crystal‐like orientational ordering, have emerged as highly appealing soft materials. Owing to their exceptional performance functionalities, they are becoming incredibly important materials in active planar optics photonics. Additionally, silk proteins, luminescent materials, metasurfaces exhibit properties, enabling remarkable multifunctional applications. This review focuses on advancements stimuli‐responsive including LCs, well some these paired with LCs. Their attractive tunable applications photonics, along great potential future systems, also emphasized.

Language: Английский

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Diffractive optical elements 75 years on: from micro-optics to metasurfaces

Photonics Insights, Journal Year: 2023, Volume and Issue: 2(4), P. R09 - R09

Published: Jan. 1, 2023

Diffractive optical elements (DOEs) are intricately designed devices with the purpose of manipulating light fields by precisely modifying their wavefronts. The concept DOEs has its origins dating back to 1948 when D. Gabor first introduced holography. Subsequently, researchers binary (BOEs), including computer-generated holograms (CGHs), as a distinct category within realm DOEs. This was revolution in devices. next major breakthrough field manipulation occurred during early 21st century, marked advent metamaterials and metasurfaces. Metasurfaces particularly appealing due ultra-thin, ultra-compact properties capacity exert precise control over virtually every aspect fields, amplitude, phase, polarization, wavelength/frequency, angular momentum, etc. advancement micro/nano-structures also enabled various applications such information acquisition, transmission, storage, processing, display. In this review, we cover fundamental science, cutting-edge technologies, wide-ranging associated micro/nano-scale for regulating fields. We delve into prevailing challenges pursuit developing viable technology real-world applications. Furthermore, offer insights potential future research trends directions manipulation.

Language: Английский

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Highly Tunable Cascaded Metasurfaces for Continuous Two‐Dimensional Beam Steering

Advanced Science, Journal Year: 2023, Volume and Issue: 10(24)

Published: June 20, 2023

Abstract Cascaded metasurfaces can exhibit powerful dynamic light manipulation by mechanically tuning the far‐field interactions in layers. However, most current designs, are separated gaps smaller than a wavelength to form total phase profile, representing direct accumulation of profiles each layer. Such small gap sizes may not only conflict with conditions but also pose great difficulties for practical implementations. To overcome this limitation, design paradigm taking advantage ray‐tracing scheme that allows cascaded operate optimally at easily achievable is proposed. Enabled relative lateral translation two metasurfaces, continuous two‐dimensional (2D) beam‐steering device 1064 nm designed as proof concept. Simulation results demonstrate ranges ±45° biaxial deflection angles within ±3.5 mm translations, while keeping divergence deflected less 0.007°. The experimental agree well theoretical predictions, and uniform optical efficiency observed. generializeddesign pave way towards myriad tunable metasurface devices various applications, including limited detection ranging (LiDAR) free space communication.

Language: Английский

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