Neural Network‐Assisted End‐to‐End Design for Full Light Field Control of Meta‐Optics

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Meta-optics, with unique light-matter interactions and extensive design space, underpins versatile compact optical devices through flexible multi-parameter light field control. However, conventional designs struggle the intricate interdependencies of nano-structural complex responses across wavelengths polarizations at a system level, hindering high-performance full-light Here, neural network-assisted end-to-end framework that facilitates global, gradient-based optimization multifunctional meta-optics layouts for full control is proposed. Its superiority over separated showcased by utilizing limited space multi-wavelength-polarization holography enhanced performance (e.g., ≈6 × structural similarity index experimentally). By harnessing dispersive full-parameter Jones matrix, orthogonal tri-polarization multi-wavelength-depth further demonstrated, breaking channel limitations. To highlight its versatility, non-orthogonal (>3) are arbitrary polarized-spectral multi-information processing applications in display, imaging, computing. The comprehensive elevates meta-optics, delivering superior performance, functionality, improved reliability, thereby paving way next-generation intelligent technologies.

Language: Английский

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Dual‐Layer Metasurface Enhanced Capacity of Polarization Multiplexing

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(9)

Published: April 30, 2024

Abstract Polarization is the nature of optics. Exploiting metasurface's polarizations can enhance multiplexing capacity but face a limited number channels. For example, single‐layer metasurface offer three independent channels with six degrees freedom (DoFs) including amplitude and phase E x , xy(yx) y Jones matrix. In this work, it theoretically demonstrated that dual‐layer metasurfaces reach eight, overcoming polarization constraints cross‐talk be largely reduced as compared when channel larger than three. Numerical calculations manifest decrease 100%, 63%, 50% for 4, 5, 6, respectively. As proof‐of‐concept demonstration high‐capacity multiplexing, an arbitrary‐polarization‐controlled 5‐channel exhibiting five nanoprintings holographic images under different incident output successfully designed. Thus, research highlighting high‐multiplexing‐capacity significantly advance multifunctional optical devices high efficiency, simple integration, ease manipulation.

Language: Английский

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Chirality-Free Full Decoupling of Jones Matrix Phase-Channels with a Planar Minimalist Metasurface

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

Published: Jan. 1, 2025

The complete manipulation of Jones matrix phase-channels using metasurfaces brings forth unparalleled possibilities across diverse wavefront modulation applications. Traditionally, achieving independent control over all four usually involves the introduction chirality with multilayer or three-dimensional metasurfaces. Here, we present a general chirality-free method that relies on polarization base transformation planar minimalist metasurface, effectively decoupling phase-channels, thereby unleashing fundamental boundaries imposed by conventional linear circular bases. To achieve these channels, employ an inverse design methodology leveraging gradient descent algorithm. Remarkably, our strategy enables channel modulations only three degrees freedom within meta-structures. As proof-of-concept, experimentally project far-field holographic images, each corresponding to one holding promises for various applications such as augmented/virtual reality display, information encryption, optical communication and data storage.

Language: Английский

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All-optical analog differential operation and information processing empowered by meta-devices

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Abstract The burgeoning demand for high-performance computing, robust data processing, and rapid growth of big necessitates the emergence novel optical devices to efficiently execute demanding computational processes. field meta-devices, such as metamaterial or metasurface, has experienced unprecedented over past two decades. By manipulating amplitude, phase, polarization, dispersion light wavefronts in spatial, spectral, temporal domains, viable solutions implementation all-optical analog computation information processing have been provided. In this review, we summarize latest developments emerging trends meta-devices innovative platforms spatial differentiators processing. Based on general concepts Fourier transform Green’s function, analyze physical mechanisms application amplitude differentiation, phase differentiation their applications image edge detection, enhancement, beam shaping. Finally, explore current challenges potential provide perspectives future research directions possible developments.

Language: Английский

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Varifocal Metalens for Compact and Accurate Quantitative Phase Imaging

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(7), P. 2797 - 2804

Published: July 4, 2024

The transport of intensity equation (TIE), a noninterferometric method for quantitative phase imaging (QPI), enables the characterization transparent objects and is widely applied in fields such as biomedicine, materials science, optical metrology. Traditional TIE methods require mechanical movement detectors to capture multiple images, which limits integration, stability, speed system. In this work, an approach introduced that replaces with alteration properties incident light. By combining specially designed polarization multiplexed metasurface rotation light source's state, varifocal metalens realized. This allows acquisition defocused images without movement. Coupled multiple-frame algorithm, it yields compact, stable, accurate phase-imaging technique. Compared dual-channel metalens, reconstruction based on exhibits superior robustness enhanced accuracy. experimental results indicate our can accurately reconstruct different gradients using partially coherent illumination, achieving average percentage error less than 2.7%. dynamic illumination approach, combined specific metasurfaces, holds potential applications realizing lightweight, multifunctional systems.

Language: Английский

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Color Holographic Display Based on Complex‐Amplitude Metasurface

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 17, 2024

Abstract Holography is an ideal solution for truly 3D display. Complex‐amplitude hologram can realize high quality reconstructions compared to amplitude‐only and phase‐only hologram. It difficult conventional spatial light modulators achieve complex‐amplitude holographic display while ensuring temporal resolution, let alone color Benefiting from the subwavelength pixel size powerful multi‐dimensional electromagnetic wave control capabilities, a few metasurface with large viewing angle, no high‐order diffraction crosstalk based on have been studied realized. Nevertheless, colorful holography at visible frequency has not implemented yet. Here dual‐wavelength proposed by using single cross‐shaped meta‐atom. The polarization conversion efficiency of each wavelength channel controlled adjusting geometric size, phase value 0 2π manipulated Pancharatnam–Berry(PB) rotating Without multiplexing, high‐resolution property retained. designed achieves dual‐color in far‐field experimental results agree well simulation results. opens pathway displays other applications that require modulation different wavelengths.

Language: Английский

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Inverse design of metalenses with polarization and chromatic dispersion modulation via transfer learning

Optics Letters, Journal Year: 2024, Volume and Issue: 50(1), P. 189 - 189

Published: Dec. 9, 2024

Polarization and wavelength multiplexed metalenses address the bulkiness of traditional imaging systems. However, despite progress with numerical simulations parameter scanning, engineering complexity classical methods highlights urgent need for efficient deep learning approaches. This paper introduces a learning-driven inverse design model polarization-multiplexed metalenses, employing propagation phase theory alongside spectral transfer to chromatic dispersion challenges. The facilitates rapid off-axis dual-focus capabilities within single wavelength. Numerical reveal focal length deviation less than 5% an average focusing efficiency 43.3%. integration streamlines process, enabling multifunctional enhanced full-color displacement measurement, thus advancing field metasurfaces.

Language: Английский

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Meta‐Device for Field‐of‐View Tunability via Adaptive Optical Spatial Differentiation

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Optical edge detection is a crucial optical analog computing method in fundamental artificial intelligence, machine vision, and image recognition, owing to its advantages of parallel processing, high speed, low energy consumption. Field-of-view-tunable particularly significant for detecting broader range objects, enhancing both practicality flexibility. In this work, novel approach-adaptive spatial differentiation proposed field-of-view-tunable detection. This improves the ability acquire information facilitates over wider angular range. The adaptive meta-device relies on two core components: dielectric metasurface liquid prism. shown function as highly efficient (≈85%) isotropic differentiator, operating across entire visible spectrum (400 700 nm) within wide-angle object space, expanding up 4.5 times original field view. scheme presents new opportunities efficient, flexible, high-capacity integrated data processing imaging devices. And simultaneously provides architecture next generation wide field-of-view phase contrast microscopy.

Language: Английский

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Enhanced optical encryption via polarization-dependent multi-channel metasurfaces

Nanophotonics, Journal Year: 2025, Volume and Issue: 14(4), P. 495 - 502

Published: Feb. 3, 2025

Abstract Optical encryption offers a powerful platform for secure information transfer, combining low power consumption, high-speed transmission, and intuitive visualization. Metasurfaces, with their unprecedented ability to manipulate light across multiple degrees of freedom within quasi-two-dimensional nanostructures, are emerging as promising devices advanced encryption. However, capacity remains constrained by limited channels. Here, we present visual secret sharing (VSS) scheme utilizing metasurfaces polarization-dependent channels minimized crosstalk. Using global optimization strategy nanostructure geometries the entire metasurface, successfully realize eight independent polarization negligible By encoding both key into these modified VSS scheme, demonstrate complete recovery seven plaintexts. This supports scalable, high-capacity encryption, can incorporate additional optical freedom, offering solutions communication, storage, anti-counterfeiting.

Language: Английский

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Multiplexed Metasurfaces for Diffractive Optics via Phase Correlation Method

Optics Letters, Journal Year: 2025, Volume and Issue: 50(6), P. 1989 - 1989

Published: Feb. 18, 2025

The multiplexing capability of metasurfaces has been successfully demonstrated in applications such as holography and diffractive neural networks. However, identifying a suitable structure that simultaneously satisfies the phase requirements across multiple channels remains significant challenge many design scenarios. In this study, we propose an innovative correlation method for metasurface utilizes multi-layer perceptron (MLP) to establish correlations channels. This approach reduces difficulty multi-channel training by converting it into simpler single-channel optimization task, thereby reducing complexity computational cost. Using proposed method, dual-wavelength multiplexed network (DW-MDNN) multi-wavelength color under linear polarization. designed achieves up 90% classification accuracy image recognition exhibits good performance holography.

Language: Английский

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