Lensless camera: Unraveling the breakthroughs and prospects DOI Creative Commons
Shuowen Li, Yunhui Gao, Jiachen Wu

et al.

Fundamental Research, Journal Year: 2024, Volume and Issue: unknown

Published: March 1, 2024

Lensless imaging is an innovative and swiftly advancing technology at the intersection of optics, technology, computational science. It captures scene by directly recording interference or diffraction patterns light, subsequently utilizing algorithms to reconstruct original image from these patterns. upends traditional paradigms, offering newfound design flexibility capacity seamlessly integrate within diverse ecosystems. This paper aims provide overview significant developments in optical modulation elements, sensors, reconstruction algorithms. The novel application scenarios that benefit lensless are presented. opportunities challenges associated with camera discussed for further improving its performance.

Language: Английский

Metalenses phase characterization by multi-distance phase retrieval DOI Creative Commons
Bowen Liu,

Jialuo Cheng,

Maoxiong Zhao

et al.

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: Aug. 6, 2024

Abstract Metalens, characterized by their unique functions and distinctive physical properties, have gained significant attention for potential applications. To further optimize the performance of metalens, it is necessary to characterize phase modulation metalens. In this study, we present a multi-distance retrieval system based on optical field scanning discuss its convergence robustness. Our findings indicate that capable retrieving distribution metalens as long measurement noise low total length scanned light sufficiently long. This enables analysis focal aberration utilizing computed distribution. We extend our investigation measure operating in near-infrared (NIR) spectrum identify impact defects sample phase. Additionally, conduct comparative air ethanol observe variations different working mediums. provides straightforward method characterization aiding optimizing design functionality.

Language: Английский

Citations

15
Metalens in Improving Imaging Quality: Advancements, Challenges, and Prospects for Future Display DOI
Yuyan Peng, Jiawei Zhang, Xiongtu Zhou

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(4)

Published: Jan. 25, 2024

Abstract Metalens, a metasurface with focusing phase, has been the focus of research due to its immense potential for use in imaging and display technology. Traditional lens optical systems rely on phase accumulation, however metalens subwavelength structures provide disruptive path miniaturized by allowing unfettered modulation incident light's amplitude. Recently, extensive efforts have devoted exploring new design strategies, functionalities, possible applications. This paper reviews development, principle, classification, status metalens. In particular, this review focuses progress challenges improving quality expanding diversity, including improvements resolution, enhancement depth field, extension field view, achromatism. Lastly, prospects future are summarized, application potentials novel 3D display, intelligent bionic as well nano‐pixelate light‐emitting (NLED) emphasized.

Language: Английский

Citations

14
Gigahertz-rate-switchable wavefront shaping through integration of metasurfaces with photonic integrated circuit DOI Creative Commons
Haozong Zhong,

Yong Zheng,

Jiacheng Sun

et al.

Advanced Photonics, Journal Year: 2024, Volume and Issue: 6(01)

Published: Feb. 2, 2024

Achieving spatiotemporal control of light at high speeds presents immense possibilities for various applications in communication, computation, metrology, and sensing. The integration subwavelength metasurfaces optical waveguides offers a promising approach to manipulate across multiple degrees freedom speed compact photonic integrated circuit (PIC) devices. Here, we demonstrate gigahertz-rate-switchable wavefront shaping by integrating metasurface, lithium niobate on insulator waveguides, electrodes within PIC device. As proofs concept, showcase the generation focus beam with reconfigurable arbitrary polarizations, switchable focusing lateral focal positions length, orbital angular momentum beams as well Bessel beams. Our measurements indicate modulation up gigahertz rate. This platform versatile efficient means controlling field system, paving way potential sensing, imaging.

Language: Английский

Citations

11
Quantitative phase imaging with a compact meta-microscope DOI Creative Commons
Junyi Wang,

Rongtao Yu,

Xin Ye

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 1(1)

Published: April 8, 2024

Abstract Quantitative phase imaging (QPI) based on the transport-of-intensity equation (TIE) is a powerful technique in label-free microscopy. The image stack required for successful TIE-QPI traditionally obtained by translating object or plane, and optical elements used conventional systems are usually bulky cumbersome. Stable compact methods capable of non-motion zooming can significantly facilitate applications that demand portability. Here, we propose method dispersive metalens. nature metalens utilized to provide spectral focal tuning. With fixed planes, seven through-focus intensity images captured changing illumination wavelength. QPI performance validated retrieving surface profiles microlens array resolution target, showing high detection accuracy (deviation less than 0.03 wavelength). Subsequently, established meta-microscope integrating with commercially available CMOS sensor, which shows good microscopic unstained bio-samples. Our approach, large-dispersive metalens, facilitates robust system metrology

Language: Английский

Citations

11
Highly sensitive split ring resonator-based sensor for quality monitoring of edible oils DOI Creative Commons
Muhammad Amir Khalil, Wong Hin Yong,

Tehseen Batool

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 17, 2025

This research presents the design and analysis of a compact metamaterial (MTM)-based star-shaped split-ring resonator (SRR) enclosed in square, constructed on cost-effective substrate for liquid chemical sensing applications. The designed structure has dimensions 10 × mm2 is optimized detecting adulteration edible oils. When sample holder filled with different percentages oil samples, resonance frequency MTM-based SRR sensor shift significantly. measured results demonstrate that proposed superior terms sensitivity quality factor compared to studies literature. shows performance (Q-factor) existing sensors It exhibits remarkable 0.92 760 MHz detection, which higher than shifts ranging from 140 600 reported previous studies. Additionally, high Q-factor 149, indicating its efficiency determining error rate minimal at 3.1%, significant improvement over prior sensors, have rates as 8%. These enhancements highlight sensor's potential applications requiring precise, efficient, detection adulteration, thus offering advancement both practical utility traditional methods.

Language: Английский

Citations

2
A temperature-insensitive graphene-water-based ultra-wideband terahertz metamaterials absorber designed using deep neural networks DOI
Jing Li, Huanyang Chen, S. L. Yap

et al.

Optics & Laser Technology, Journal Year: 2025, Volume and Issue: 185, P. 112591 - 112591

Published: Feb. 17, 2025

Language: Английский

Citations

1
High-efficiency generation of bi-functional holography with metasurfaces DOI Creative Commons

Changhong Dai,

Tong Liu, Dongyi Wang

et al.

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

Published: Feb. 19, 2025

Abstract Holography is a highly desired technology in modern photonics, yet setups for traditional generating methods suffer from complexity and bulky sizes. While metasurface-based holography exhibits advantages of compactness easy-fabrication, most meta-holograms realized so far exhibit only single functionality, with few multifunctional ones suffering imbalances efficiency device-thickness. Here, we propose generic approach to design ultra-thin metasurfaces realization multiple holographic images high efficiencies , experimentally verify the concept telecom regime. We first series high-efficiency reflective meta-atoms exhibiting incident-spin-delinked reflection phases governed by geometric resonant mechanisms, characterize their optical properties at wavelengths around 1,064 nm. next demonstrate single-functional meta-hologram as benchmark test. Finally, employ designed construct metasurface thickness ∼1/4 λ its capability two distinct under illuminations circularly polarized light beams different helicities, possessing generation ∼48.08 %. Our work provides highly-efficient ultra-compact platform generate images, which may inspire numerous applications integration optics.

Language: Английский

Citations

1
High-performance achromatic flat lens by multiplexing meta-atoms on a stepwise phase dispersion compensation layer DOI Creative Commons

Jingen Lin,

Jinbei Chen,

Jianchao Zhang

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: March 5, 2025

Flat optics have attracted interest for decades due to their flexibility in manipulating optical wave properties, which allows the miniaturization of bulky assemblies into integrated planar components. Recent advances achromatic flat lenses shown promising applications various fields. However, it is a significant challenge with high numerical aperture simultaneously achieve broad bandwidth and expand sizes. Here, we present zone division multiplex meta-atoms on stepwise phase dispersion compensation (SPDC) layer address above challenge. In principle, size can be freely enlarged by increasing thickness difference between central marginal zones SPDC layer, without limit bandwidth. The also serves as substrate, making device thinner. Two 500 nm 650-1000 are experimentally achieved: one 0.9 radius 20.1 µm, another 0.7 30.0 µm. To best our knowledge, they broadband highest apertures, largest sizes thinnest reported so far. Microscopic imaging 1.10 µm resolution has been demonstrated white light illumination, surpassing any previously attained metalenses multi-level diffractive lenses. These unprecedented performances mark substantial step toward practical

Language: Английский

Citations

1
Programmable optical meta-holograms DOI Creative Commons

Jing Cheng Zhang,

Yubin Fan, Jin Yao

et al.

Nanophotonics, Journal Year: 2023, Volume and Issue: 13(8), P. 1201 - 1217

Published: Sept. 30, 2023

The metaverse has captured significant attention as it provides a virtual realm that cannot be experienced in the physical world. Programmable optical holograms, integral components of metaverse, allow users to access diverse information without needing external equipment. Meta-devices composed artificially customized nano-antennas are excellent candidates for programmable holograms due their compact footprint and flexible electromagnetic manipulation. meta-holograms can dynamically alter reconstructed images real-time by directly modulating properties metasurface or modifying incident light. Information encoded across multiple channels freely selected through switchable functionality. These advantages will broaden range scenarios facilitating further development practical applications. This review concentrates on recent advancements fundamentals applications meta-holograms. We aim provide readers with general knowledge potential inspiration applying meta-holograms, both intrinsic ways, into better performance. An outlook perspective challenges prospects these rapidly growing research areas provided.

Language: Английский

Citations

18
High-order diffraction for optical superfocusing DOI Creative Commons
Jun He, Hong Liu, Dong Zhao

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 6, 2024

Language: Английский

Citations

8