Applications of bound states in the continuum in photonics

Nature Reviews Physics, Journal Year: 2023, Volume and Issue: 5(11), P. 659 - 678

Published: Oct. 6, 2023

Language: Английский

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Integrated metasurfaces for re-envisioning a near-future disruptive optical platform

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: June 20, 2023

Abstract Metasurfaces have been continuously garnering attention in both scientific and industrial fields, owing to their unprecedented wavefront manipulation capabilities using arranged subwavelength artificial structures. To date, research has mainly focused on the full control of electromagnetic characteristics, including polarization, phase, amplitude, even frequencies. Consequently, versatile possibilities wave achieved, yielding practical optical components such as metalenses, beam-steerers, metaholograms, sensors. Current is now integrating aforementioned metasurfaces with other standard (e.g., light-emitting diodes, charged-coupled devices, micro-electro-mechanical systems, liquid crystals, heaters, refractive elements, planar waveguides, fibers, etc.) for commercialization miniaturization trends devices. Herein, this review describes classifies metasurface-integrated components, subsequently discusses promising applications platforms those augmented/virtual reality, light detection ranging, In conclusion, presents several challenges prospects that are prevalent field order accelerate metasurfaces-integrated platforms.

Language: Английский

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Roadmap for Optical Metasurfaces

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(3), P. 816 - 865

Published: Feb. 27, 2024

Metasurfaces have recently risen to prominence in optical research, providing unique functionalities that can be used for imaging, beam forming, holography, polarimetry, and many more, while keeping device dimensions small. Despite the fact a vast range of basic metasurface designs has already been thoroughly studied literature, number metasurface-related papers is still growing at rapid pace, as research now spreading adjacent fields, including computational augmented virtual reality, automotive, display, biosensing, nonlinear, quantum topological optics, computing, more. At same time, ability metasurfaces perform functions much more compact systems triggered strong constantly interest from various industries greatly benefit availability miniaturized, highly functional, efficient components integrated optoelectronic low cost. This creates truly opportunity field make both scientific an industrial impact. The goal this Roadmap mark "golden age" define future directions encourage scientists engineers drive development toward excellence broad adoption.

Language: Английский

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Brillouin zone folding driven bound states in the continuum

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 17, 2023

Non-radiative bound states in the continuum (BICs) allow construction of resonant cavities with confined electromagnetic energy and high-quality (Q) factors. However, sharp decay Q factor momentum space limits their usefulness for device applications. Here we demonstrate an approach to achieve sustainable ultrahigh factors by engineering Brillouin zone folding-induced BICs (BZF-BICs). All guided modes are folded into light cone through periodic perturbation that leads emergence BZF-BICs possessing throughout large, tunable space. Unlike conventional BICs, show perturbation-dependent dramatic enhancement entire robust against structural disorders. Our work provides a unique design path BZF-BIC-based silicon metasurface extreme robustness disorder while sustaining factors, offering potential applications terahertz devices, nonlinear optics, quantum computing, photonic integrated circuits.

Language: Английский

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Nonlocal flat optics

Nature Photonics, Journal Year: 2022, Volume and Issue: 17(1), P. 36 - 47

Published: Dec. 22, 2022

Language: Английский

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Waveguide-based augmented reality displays: perspectives and challenges

eLight, Journal Year: 2023, Volume and Issue: 3(1)

Published: Dec. 7, 2023

Abstract Augmented reality (AR) displays, as the next generation platform for spatial computing and digital twins, enable users to view images superimposed on real-world environment, fostering a deeper level of human-digital interactions. However, critical element in an AR system, optical combiners face unprecedented challenges match exceptional performance requirements human vision system while keeping headset ultracompact lightweight. After decades extensive device material research efforts, heavy investment manufacturing technologies, several promising waveguide have been developed. In this review paper, we focus perspectives displays. We will begin by introducing basic structures operation principles different architectures, then delve into combiners, including geometric diffractive combiners. Some commonly used in-couplers out-couplers, such prisms, mirrors, surface relief gratings, volume holographic polarization metasurface-based couplers, be discussed, their properties analyzed detail. Additionally, explore recent advances combiner design modeling, exit pupil expansion, wide field view, architectures full-color propagation, brightness color uniformity optimization. Finally, discuss bottlenecks future development trends technologies. The objective is provide comprehensive overview current state analyze pros cons, present

Language: Английский

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Revolutionary meta-imaging: from superlens to metalens

Photonics Insights, Journal Year: 2023, Volume and Issue: 2(1), P. R01 - R01

Published: Jan. 1, 2023

The refractive-lens technique has been well developed over a long period of evolution, offering powerful imaging functionalities, such as microscopes, telescopes, and spectroscopes. Nevertheless, the ever-growing requirements continue to urge further enhanced capabilities upgraded devices that are more compact for convenience. Metamaterial fascinating concept inspired unprecedented new explorations in physics, material science, optics, not only fundamental researches but also novel applications. Along with topic, this paper reviews progress flat lens an important branch metamaterials, covering early superlens super-diffraction capability current hot topics metalenses including paralleled strategy multilevel diffractive lenses. Numerous efforts approaches have dedicated areas ranging from physics feasible This review provides clear picture flat-lens evolution perspective metamaterial design, elucidating relation comparison between metalens, addressing derivative designs. Finally, application scenarios favor ultrathin emphasized respect possible revolutionary devices, followed by conclusive remarks prospects.

Language: Английский

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Integrated-resonant metadevices: a review

Advanced Photonics, Journal Year: 2023, Volume and Issue: 5(02)

Published: Feb. 22, 2023

Integrated-resonant units (IRUs), associating various meta-atoms, resonant modes, and functionalities into one supercell, have been promising candidates for tailoring composite multifunctional electromagnetic responses with additional degrees of freedom. metadevices can overcome many bottlenecks in conventional optical devices, such as broadband achromatism, efficiency enhancement, response selectivity, continuous tunability, offering great potential performant versatile application scenarios. We focus on the recent progress integrated-resonant metadevices. Starting from design principle IRUs, a variety IRU-based characteristics subsequent practical applications, including achromatic imaging, light-field sensing, polarization detection, orbital angular momentum generation, metaholography, nanoprinting, color routing, nonlinear are introduced. Existing challenges this field opinions future research directions also provided.

Language: Английский

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Metasurfaces for near-eye display applications

Opto-Electronic Science, Journal Year: 2023, Volume and Issue: 2(8), P. 230025 - 230025

Published: Jan. 1, 2023

Virtual reality (VR) and augmented (AR) are revolutionizing our lives. Near-eye displays crucial technologies for VR AR. Despite the rapid advances in near-eye display technologies, there still challenges such as large field of view, high resolution, image quality, natural free 3D effect, compact form factor. Great efforts have been devoted to striking a balance between visual performance device compactness. While traditional optics nearing their limitations addressing these challenges, ultra-thin metasurface optics, with light-modulating capabilities, may present promising solution. In this review, we first introduce AR displays, then briefly explain working principles metasurfaces, review recent developments devices geared toward applications, delved into several advanced based on finally discuss about remaining future perspectives associated metasurfaces applications.

Language: Английский

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Real time full-color imaging in a Meta-optical fiber endoscope

eLight, Journal Year: 2023, Volume and Issue: 3(1)

Published: June 7, 2023

Abstract Endoscopes are an important component for the development of minimally invasive surgeries. Their size is one most critical aspects, because smaller and less rigid endoscopes enable higher agility, facilitate larger accessibility, induce stress on surrounding tissue. In all existing endoscopes, optics poses a major limitation in miniaturization imaging system. Not only making small difficult, but their performance also degrades with downscaling. Meta-optics have recently emerged as promising candidate to drastically miniaturize while achieving similar functionalities significantly reduced size. Herein, we report inverse-designed meta-optic, which combined coherent fiber bundle enables 33% reduction tip length over traditional gradient-index (GRIN) lenses. We use meta-optic endoscope (MOFIE) demonstrate real-time video capture full visible color, spatial resolution primarily limited by itself. Our work shows potential meta-optics integration biomedical devices towards surgery.

Language: Английский

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