Tunable metasurfaces towards versatile metalenses and metaholograms: a review

Advanced Photonics, Journal Year: 2022, Volume and Issue: 4(02)

Published: March 7, 2022

Metasurfaces have attracted great attention due to their ability manipulate the phase, amplitude, and polarization of light in a compact form. Tunable metasurfaces been investigated recently through integration with mechanically moving components electrically tunable elements. Two interesting applications, particular, are vary focal point metalenses switch between holographic images. We present recent progress on focused metaholograms, including basic working principles, advantages, disadvantages each mechanism. classify stimuli based source electrical bias, as well others such thermal mechanical modulation. conclude by summarizing providing our perspectives for further development metasurfaces.

Language: Английский

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Liquid crystal-powered Mie resonators for electrically tunable photorealistic color gradients and dark blacks

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: April 29, 2022

Taking inspiration from beautiful colors in nature, structural produced nanostructured metasurfaces have shown great promise as a platform for bright, highly saturated, and high-resolution colors. Both plasmonic dielectric materials been employed to produce static that fulfil the required criteria high-performance color printing, however, practical applications dynamic situations, form of tunability is desirable. Combinations additive palette red, green, blue enable expression further beyond three primary colors, while simultaneous intensity modulation allows access full gamut. Here, we demonstrate an electrically tunable metasurface can represent saturated pixels be dynamically continuously controlled between on off states using liquid crystals. We use this experimentally realize ultrahigh-resolution active multicolor cryptographic applications, toward full-color reflective displays.

Language: Английский

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Enabling smart vision with metasurfaces

Nature Photonics, Journal Year: 2022, Volume and Issue: 17(1), P. 26 - 35

Published: Dec. 22, 2022

Language: Английский

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Resonant‐Cavity‐Enhanced Electrochromic Materials and Devices

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(47)

Published: March 16, 2023

With rapid advances in optoelectronics, electrochromic materials and devices have received tremendous attentions from both industry academia for their strong potentials wearable portable electronics, displays/billboards, adaptive camouflage, tunable optics, intelligent devices, etc. However, conventional typically present some serious limitations such as undesirable dull colors, long switching time, hindering deeper development. Optical resonators been proven to be the most powerful platform providing optical confinement controllable lightmatter interactions. They generate locally enhanced electromagnetic near-fields that can convert small refractive index changes into high-contrast color variations, enabling multicolor or even panchromatic tuning of materials. Here, resonant-cavity-enhanced an advanced emerging trend electrochromics, are reviewed. In this review, w e will focus on progress based different types applications, including multichromatic displays, visible visualized energy storage, applications multispectral tunability. Among these topics, principles resonators, related materials/devices properties comprehensively discussed summarized. Finally, challenges prospects presented.

Language: Английский

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Electrochemical and Electrical Biosensors for Wearable and Implantable Electronics Based on Conducting Polymers and Carbon-Based Materials

Chemical Reviews, Journal Year: 2023, Volume and Issue: 124(3), P. 722 - 767

Published: Dec. 29, 2023

Bioelectronic devices are designed to translate biological information into electrical signals and vice versa, thereby bridging the gap between living world electronic systems. Among different types of bioelectronics devices, wearable implantable biosensors particularly important as they offer access physiological biochemical activities tissues organs, which is significant in diagnosing researching various medical conditions. Organic conducting semiconducting materials, including polymers (CPs) graphene carbon nanotubes (CNTs), some most promising candidates for biosensors. Their unique electrical, electrochemical, mechanical properties bring new possibilities that could not be realized by utilizing metals- or silicon-based analogues. The use organic- carbon-based conductors development has emerged a rapidly growing research field, with remarkable progress being made recent years. such materials addresses issue mismatched well improvement accuracy fidelity transferred information. In this review, we highlight advances field provide insights organic (semi)conducting materials' relate these their applications wearable/implantable We also perspective on potential exciting future developments

Language: Английский

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The rise of electrically tunable metasurfaces

Science Advances, Journal Year: 2024, Volume and Issue: 10(34)

Published: Aug. 23, 2024

Metasurfaces, which offer a diverse range of functionalities in remarkably compact size, have captured the interest both scientific and industrial sectors. However, their inherent static nature limits adaptability for further applications. Reconfigurable metasurfaces emerged as solution to this challenge, expanding potential Among series tunable devices, electrically controllable devices garnered particular attention owing seamless integration with existing electronic equipment. This review presents recent progress reported respect providing an overview technological development trajectory current state art. In particular, we analyze major tuning strategies discuss applications spatial light modulators, optical waveguides, adaptable emissivity regulators. Furthermore, challenges opportunities associated implementation are explored, thereby highlighting bridge gap between electronics photonics enable groundbreaking systems.

Language: Английский

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Electrically tunable optical metasurfaces

Photonics Insights, Journal Year: 2024, Volume and Issue: 3(3), P. R07 - R07

Published: Jan. 1, 2024

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Continuous spectral and coupling-strength encoding with dual-gradient metasurfaces

Nature Nanotechnology, Journal Year: 2024, Volume and Issue: 19(12), P. 1804 - 1812

Published: Aug. 26, 2024

Abstract To control and enhance light–matter interactions at the nanoscale, two parameters are central: spectral overlap between an optical cavity mode material’s features (for example, excitonic or molecular absorption lines), quality factor of cavity. Controlling both simultaneously would enable investigation systems with complex features, such as multicomponent mixtures heterogeneous solid-state materials. So far, it has been possible only to sample a limited set data points within this two-dimensional parameter space. Here we introduce nanophotonic approach that can continuously encode quality-factor space compact spatial area. We use dual-gradient metasurface design composed array smoothly varying subwavelength nanoresonators, each supporting unique based on symmetry-protected bound states in continuum. This results 27,500 distinct modes density approaching theoretical upper limit for metasurfaces. By applying our platform surface-enhanced spectroscopy, find optimal maximum sensitivity depends amount analyte, enabling effective detection regardless analyte concentration single metasurface. Our provides method analyse complete coupling-strength material applications photocatalysis, chemical sensing entangled photon generation.

Language: Английский

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A review of tunable photonics: Optically active materials and applications from visible to terahertz

iScience, Journal Year: 2022, Volume and Issue: 25(8), P. 104727 - 104727

Published: July 5, 2022

The next frontier of photonics is evolving into reconfigurable platforms with tunable functions to realize the ubiquitous application. dynamic control optical properties highly desirable for a plethora applications, including communication, display, self-adaptive photonics, and multi-spectral camouflage. Recently, meet response over broad bands, optically active materials have been integrated diverse photonic platforms, typically in dimension micro/nanometer scales. Here, we review recent advances controlling from visible terahertz (THz) spectral range. We propose guidelines designing conjunction materials, inherent wavelength characteristics. In particular, devote our their potential uses five different applications: structural coloration, metasurface flat optics, memory, thermal radiation, plasmonics. Finally, conclude an outlook on challenges prospects photonics.

Language: Английский

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Optical Beam Steering Using Tunable Metasurfaces

ACS Photonics, Journal Year: 2022, Volume and Issue: 9(7), P. 2204 - 2218

Published: June 30, 2022

Optical beam steering is needed in many applications including, for example, LIDAR, optical communications, laser machining, and 3D printing. Autonomous cars drones need the increasing demand bandwidth shows no sign of abating, advanced manufacturing using lasers continues to gain importance; such drive growing devices motivates research on new approaches technologies. Tunable metasurfaces hold promise nonmechanical solid-state integrated devices, fabricated wafer-scale processes amenable mass manufacturing. Although still its infancy, field tunable showing significant through an early demonstration concepts, further motivating already vigorous effort globally. The purpose this Perspective assess progress dynamically nanoantennas metasurfaces. Recent results are highlighted, state given a critical look.

Language: Английский

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