Wide-viewing-angle color holographic 3D display system with high brightness encoding

PhotoniX, Journal Year: 2025, Volume and Issue: 6(1)

Published: Feb. 21, 2025

Abstract Holographic 3D display technology, widely considered the ultimate solution for real display, has broad applications in fields including advertisement, industrial manufacturing and military. However, it is difficult to simultaneously realize color holographic with wide viewing angle high brightness required an immersive visual experience. Here, a novel system based on customized achromatic liquid crystal grating phase-only spatial light modulator proposed. Thanks secondary diffraction performed by grating, nine images of red, green blue channels overlap space time sequence. Additionally, hologram encoding method developed, which introduces frequency loss function dynamic weights ensure that differences all components domain can be learned. The proposed dramatically enhances energy utilization factor five, resulting significantly brighter reconstructed while substantially attenuating background noise non-target regions. This groundbreaking system, achieving remarkable ~ 65° good image quality brightness, represents significant advancement offering comprehensive wide-viewing-angle, high-brightness, displays potential across diverse technological domains.

Language: Английский

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Optical Metasurfaces for the Next‐Generation Biosensing and Bioimaging

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: March 8, 2025

Abstract Recent advances in this understanding of light‐matter interactions, combined with innovations the design and fabrication large‐scale nanostructured metasurfaces, have enabled transformative approaches to biosensing bioimaging. This review delves into profound impact optical highlighting that leverage their tunable properties adaptability. It begins an overview key sensing mechanisms across various metasurface modalities, comparing effects on metrics such as sensitivity limits detection. The discussion then shifts recent advancements refractometric biosensing, focusing novel transduction methods exploit intensity, phase, colorimetric responses these metasurfaces. latest developments surface‐enhanced spectroscopic are also examined, exploring how metasurfaces contribute enhanced molecular fingerprinting capabilities applications. Additionally, role advancing bioimaging assessed, emphasizing label‐free elastic scattering, spectroscopic/chemical contrast imaging, metasurface‐assisted super‐resolution microscopy. Finally, addresses current challenges future directions for including material limitations, difficulties fabrication, complexity data analysis readout methods. discusses integration detector hardware improve spatiotemporal resolution imaging techniques.

Language: Английский

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Nanofabrication for Nanophotonics

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

Published: March 28, 2025

Nanofabrication, a pivotal technology at the intersection of nanoscale engineering and high-resolution patterning, has substantially advanced over recent decades. This enables creation nanopatterns on substrates crucial for developing nanophotonic devices other applications in diverse fields including electronics biosciences. Here, this mega-review comprehensively explores various facets nanofabrication focusing its application nanophotonics. It delves into techniques like focused ion beam electron lithography, methods 3D complex structure fabrication, scalable manufacturing approaches, material compatibility considerations. Special attention is given to emerging trends such as utilization two-photon lithography structures materials phase change substances 2D with excitonic properties. By highlighting these advancements, review aims provide insights ongoing evolution nanofabrication, encouraging further research creating functional nanostructures. work encapsulates critical developments future perspectives, offering detailed narrative state-of-the-art tailored both new researchers seasoned experts field.

Language: Английский

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Self-assembled photonic cavities with atomic-scale confinement

Nature, Journal Year: 2023, Volume and Issue: 624(7990), P. 57 - 63

Published: Dec. 6, 2023

Abstract Despite tremendous progress in research on self-assembled nanotechnological building blocks, such as macromolecules 1 , nanowires 2 and two-dimensional materials 3 synthetic self-assembly methods that bridge the nanoscopic to macroscopic dimensions remain unscalable inferior biological self-assembly. By contrast, planar semiconductor technology has had an immense technological impact, owing its inherent scalability, yet it seems unable reach atomic enabled by Here, we use surface forces, including Casimir–van der Waals interactions 4 deterministically self-assemble self-align suspended silicon nanostructures with void features well below length scales possible conventional lithography etching 5 despite using only etching. The method is remarkably robust threshold for depends monotonically all governing parameters across thousands of measured devices. We illustrate potential these concepts fabricating are impossible make any other known method: waveguide-coupled high- Q photonic cavities 6,7 confine telecom photons nm air gaps aspect ratio 100, corresponding mode volumes more than 100 times diffraction limit. Scanning transmission electron microscopy measurements confirm ability build devices sub-nanometre dimensions. Our work constitutes first steps towards a new generation fabrication combines scalability semiconductors.

Language: Английский

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Generating Multi‐Depth 3D Holograms Using a Fully Convolutional Neural Network

Advanced Science, Journal Year: 2024, Volume and Issue: 11(28)

Published: May 9, 2024

Abstract Efficiently generating 3D holograms is one of the most challenging research topics in field holography. This work introduces a method for multi‐depth phase‐only using fully convolutional neural network (FCN). The primarily involves forward–backward‐diffraction framework to compute diffraction fields, along with layer‐by‐layer replacement (L 2 RM) handle occlusion relationships. fields computed by former are fed into carefully designed FCN, which leverages its powerful non‐linear fitting capability generate scenes. latter can smooth boundaries different layers scene reconstruction complementing information occluded objects, thus enhancing quality holograms. proposed hologram PSNR 31.8 dB just 90 ms resolution 2160 × 3840 on NVIDIA Tesla A100 40G tensor core GPU. Additionally, numerical and experimental results indicate that generated accurately reconstruct clear scenes correct relationships provide excellent depth focusing.

Language: Английский

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Dynamic beam shaping—Improving laser materials processing via feature synchronous energy coupling

CIRP Annals, Journal Year: 2024, Volume and Issue: 73(2), P. 533 - 559

Published: Jan. 1, 2024

Today, tailored laser beams are rarely used and thus an opportunity to optimize existing or introduce new processes is missed. New methods of dynamic beam shaping have the potential change that in future. This keynote paper deals with allowing a transient energy input into workpiece at such time scales underlying interaction guided towards desired result. It shows principles, categorizes necessary system technology, gives application examples familiarize reader topic. postulates time-scale-dependent coupling between addressed process features key for achieving optimum.

Language: Английский

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The future of brain–machine interfaces is optical

Nature Electronics, Journal Year: 2023, Volume and Issue: 6(2), P. 96 - 98

Published: Feb. 17, 2023

Language: Английский

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Zero-Added-Loss Entangled-Photon Multiplexing for Ground- and Space-Based Quantum Networks

Physical Review Applied, Journal Year: 2023, Volume and Issue: 19(5)

Published: May 9, 2023

We propose a scheme for optical entanglement distribution in quantum networks based on quasi-deterministic entangled photon pair source. By combining heralded photonic Bell generation with spectral mode conversion to interface memories, the eliminates switching losses due multiplexing. analyze this `zero-added-loss multiplexing' (ZALM) source particularly challenging problem of long-baseline via satellites and ground-based where it unlocks additional advantages: (i) substantially higher channel efficiency $\eta$ \textit{downlinks} vs.\ \textit{uplinks} realistic adaptive optics, (ii) loss occurring \textit{before} interaction memory -- i.e., Alice Bob receiving rather than transmitting improve rate scaling by $\mathcal{O}(\sqrt{\eta})$. Based numerical analyses, we estimate our protocol achieve $>$10$~$ebits/s at multiplexing $10^2$ spin qubits ground distance $>$10$^2~$km, spin-spin state fidelity exceeding 99$\%$. Our architecture presents blueprint realizing global-scale near-term.

Language: Английский

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Ultrafast All-Optical Metasurfaces: Challenges and New Frontiers

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(8), P. 2888 - 2905

Published: Aug. 7, 2024

Dynamic metasurfaces have emerged as a disruptive change in the way response of optical systems can be tailored by combining flexibility flat optics spatially engineering materials at nanoscale with opportunity to reconfigure metasurfaces' properties reversibly upon external stimuli over time. In this context, far-reaching interest pushing tuning speed has driven development 'ultrafast all-optical which transient nonlinearities photoinduced femtosecond laser pulses empower achieve GHz modulation rates. While holding great promises unlock forefront applications, future frontiers class spatiotemporal are accompanied formidable challenges. Perspective, alongside brief panorama state art, we spotlight some emerging for ultrafast light-driven metasurfaces, special emphasis on control light, enhancement light–matter interactions, and time-variant frequency conversion, hope our vision will prompt new ideas horizons explore.

Language: Английский

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Scalable photonic integrated circuits for high-fidelity light control

Optica, Journal Year: 2023, Volume and Issue: 10(10), P. 1366 - 1366

Published: Sept. 5, 2023

Advances in laser technology have driven discoveries atomic, molecular, and optical (AMO) physics emerging applications, from quantum computers with cold atoms or ions, to networks solid-state color centers. This progress is motivating the development of a new generation control systems that can manipulate light field high fidelity at wavelengths relevant for AMO applications. These are characterized by criteria: (C1) operation design wavelength choice visible (VIS) near-infrared (IR) spectrum, (C2) scalable platform support large channel counts, (C3) high-intensity modulation extinction (C4) repeatability compatible low gate errors, (C5) fast switching times. Here, we provide pathway address these challenges introducing an atom architecture based on VIS-IR photonic integrated circuit (PIC) technology. Based complementary metal–oxide–semiconductor fabrication process, this atom-control PIC (APIC) meet system requirements (C1)–(C5). As proof concept, demonstrate 16-channel silicon-nitride-based APIC (5.8±0.4)ns response times >30dB ratio 780 nm.

Language: Английский

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