Tunable structured light with flat optics

Science, Год журнала: 2022, Номер 376(6591)

Опубликована: Апрель 21, 2022

Flat optics has emerged as a key player in the area of structured light and its applications, owing to subwavelength resolution, ease integration, compact footprint. Although first generation revolutionized conventional lenses enabled anomalous refraction, new classes meta-optics can now shape dark features an optical field with unprecedented level complexity multifunctionality. Here, we review these efforts focus on metasurfaces that use different properties input light—angle incidence direction, polarization, phase distribution, wavelength, nonlinear behavior—as knobs for tuning output response. We discuss ongoing advances this well future challenges prospects. These recent developments indicate optically tunable flat is poised advance adaptive camera systems, microscopes, holograms, portable wearable devices may suggest possibilities communications sensing.

Язык: Английский

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Structural color generation: from layered thin films to optical metasurfaces

Nanophotonics, Год журнала: 2023, Номер 12(6), С. 1019 - 1081

Опубликована: Фев. 21, 2023

Recent years have witnessed a rapid development in the field of structural coloration, colors generated from interaction nanostructures with light. Compared to conventional color generation based on pigments and dyes, exhibits unique advantages terms spatial resolution, operational stability, environmental friendliness, multiple functionality. Here, we discuss recent coloration layered thin films optical metasurfaces. This review first presents fundamentals science introduces few popular spaces used for evaluation. Then, it elaborates representative physical mechanisms generation, including Fabry-Pérot resonance, photonic crystal guided mode plasmon Mie resonance. Optimization methods efficient structure parameter searching, fabrication techniques large-scale low-cost manufacturing, as well device designs dynamic displaying are discussed subsequently. In end, surveys diverse applications various areas such printing, sensing, advanced photovoltaics.

Язык: Английский

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Recent progress in metasurface-enabled optical waveplates

Nanophotonics, Год журнала: 2022, Номер 11(10), С. 2219 - 2244

Опубликована: Март 31, 2022

The polarization of light is crucial for numerous optical applications ranging from quantum information processing to biomedical sensing due the fundamental role as another intrinsic characteristic waves, which uncorrelated with amplitude, phase, and frequency. However, conventional waveplates that enable control are based on accumulated retardation between two orthogonally polarized electric fields when propagates a distance much larger than its wavelength in birefringent materials, resulting bulky configurations limited functionalities. Optical metasurfaces, ultrathin arrays engineered meta-atoms, have attracted increasing attention owing their unprecedented capabilities manipulating surface-confined subwavelength spatial resolutions, thereby opening up new possibilities revolutionizing planar elements feature compactness, integration compatibility, broadband operation bandwidths, multiple Herein, we review recent progress metasurface-enabled waveplates, covers both basic principles emerging applications. We provide an overview metasurface-based half- quarter-waveplates well use wavefront shaping applications, followed by discussion advanced including multifunctional all-polarization generators. also discuss dynamic active metasurfaces. Finally, conclude providing our outlook this fast-growing research field.

Язык: Английский

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Hybrid Dispersion Engineering based on Chiral Metamirror

Laser & Photonics Review, Год журнала: 2023, Номер 17(3)

Опубликована: Янв. 3, 2023

Abstract Dispersion is one of the key performances optical systems. As a man‐made device, metasurface notable alternative for dispersion manipulation and has been developed vigorously in recent years. However, currently reported principle meta‐atoms only relies on controlling propagation phase operation frequency band or several working wavelengths. In this paper, chirality‐assisted introduced as an additional degree freedom to engineer characteristics meta‐atom, strategy theoretically demonstrated. The characteristic chiral meta‐atom reflective manner discussed detail within bandwidth. Then, two hybrid dispersion‐engineered metamirrors (HDEMs) are proposed constructed demonstrate versatile band, including achromatic focusing lower half hyper dispersive upper abnormal respectively. Both full‐wave simulation measured verify validity flexibility strategy. This work exploits new manipulation, providing approach metasurfaces design.

Язык: Английский

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Reaching the efficiency limit of arbitrary polarization transformation with non-orthogonal metasurfaces

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 6, 2024

Polarization transformation is at the foundation of modern applications in photonics and quantum optics. Notwithstanding their applicative interests, basic theoretical experimental efforts are still needed to exploit full potential polarization Here, we reveal that coherent superposition two non-orthogonal eigen-states Jones matrix can improve drastically efficiency arbitrary with respect classical orthogonal By exploiting metasurface stacking twisted configuration, have implemented a powerful termed "non-orthogonal metasurfaces", experimentally demonstrated input-output modulation reaching nearly 100% transmission broadband angle-insensitive manner. Additionally, proposed routing methodology project independent phase holograms quadruplex circular components. Our results outline paradigm achieve extremely efficient optics, multiplexing for communication information encryption microwave optical frequencies. The authors showcase general method engineer unity, taking advantage eigen-formalism circumvent limitation conventional

Язык: Английский

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Unlocking ultra-high holographic information capacity through nonorthogonal polarization multiplexing

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Июль 26, 2024

Abstract Contemporary studies in polarization multiplexing are hindered by the intrinsic orthogonality constraints of states, which restrict scope channels and their practical applications. This research transcends these barriers introducing an innovative nonorthogonal polarization-basis approach. Utilizing spatially varied eigen-polarization states within metaatoms, we successfully reconstruct globally that exhibit minimal crosstalk. method not only facilitates generation free-vector holograms, achieving complete degrees-of-freedom three with ultra-low energy leakage, but it also significantly enhances dimensions Jones matrix, expanding to a groundbreaking 10 × scale. The fusion controllable engineering mechanism vectorial diffraction neural network culminates experimental creation 55 intricate holographic patterns across expanded channels. advancement represents profound shift field multiplexing, unlocking opportunities advanced holography quantum encryption, among other

Язык: Английский

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Free-standing bilayer metasurfaces in the visible

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 1, 2025

Язык: Английский

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Revealing complex optical phenomena through vectorial metrics

Advanced Photonics, Год журнала: 2022, Номер 4(02)

Опубликована: Март 10, 2022

Advances in vectorial polarization-resolved imaging are bringing new capabilities to applications ranging from fundamental physics through clinical diagnosis. Imaging polarimetry requires determination of the Mueller matrix (MM) at every point, providing a complete description an object's properties. Despite forming comprehensive representation, MM does not usually provide easily interpretable information about internal structure. Certain simpler metrics derived subsets elements. These permit extraction signatures that direct indicators hidden optical properties complex systems, while featuring intriguing asymmetry what can or cannot be inferred via these metrics. We harness such characteristics reveal spin Hall effect light, infer microscopic structure within laser-written photonic waveguides, and conduct rapid pathological diagnosis analysis healthy cancerous tissue. This provides insight for broader usage asymmetric information.

Язык: Английский

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

Photonics Insights, Год журнала: 2023, Номер 2(4), С. R09 - R09

Опубликована: Янв. 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.

Язык: Английский

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Polarization microscopy: from ensemble structural imaging to single-molecule 3D orientation and localization microscopy

Optica, Год журнала: 2023, Номер 10(11), С. 1486 - 1486

Опубликована: Сен. 25, 2023

Optical contrasts in microscopy are sensitive to light polarization, whose interaction with molecular dipoles provides an important lever for probing orientation. Polarization has evolved considerably during the last decade, integrating strategies ranging from traditional linear dichroism single-molecule orientation and localization imaging. This review aims provide a summary of concepts techniques behind structural imaging at level, ensemble 2D super-resolution 3D.

Язык: Английский

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