Opto-Electronic Science, Journal Year: 2024, Volume and Issue: 3(9), P. 240023 - 240023
Published: Jan. 1, 2024
Photonics Insights, Journal Year: 2024, Volume and Issue: 3(2), P. R04 - R04
Published: Jan. 1, 2024
Language: Английский
Citations
22
ACS Photonics, Journal Year: 2024, Volume and Issue: 11(4), P. 1645 - 1656
Published: April 5, 2024
Meta-optics are attracting intensive interest as alternatives to traditional optical systems comprising multiple lenses and diffractive elements. Among applications, single metalens imaging is highly attractive due the potential for achieving significant size reduction simplified design. However, metalenses exhibit severe chromatic performance degradation arising from material dispersion nature of singlet optics, making them unsuitable full-color requiring achromatic performance. In this work, we propose validate a deep learning-based approach enhance quality in systems. Our developed learning networks computationally reconstruct raw captures by effectively refocusing red, green, blue primary channels, eliminating aberration vignetting, enhancing resolution. Importantly, these improvements achieved without any hardware modifications itself. Through comprehensive evaluations on diverse synthetic real-world data sets captured under various environmental conditions focusing distances, our consistently demonstrates enhancements image quality. By providing practical implementation, method overcomes inherent limitations meta-optics enables realization complex engineering. addressing key challenges metalenses, research new applications photography, videography, micrography via easy integration with commercial cameras.
Language: Английский
Citations
16
Nanophotonics, Journal Year: 2025, Volume and Issue: 14(8), P. 1249 - 1256
Published: Feb. 15, 2025
Abstract In traditional optical imaging, image sensors only record intensity information, and phase information of transparent samples such as cells semiconductor materials is hard to obtain. Quantitative imaging techniques are crucial for obtaining detailed but current methods often require complex interferometric setups or mechanical adjustments, limiting their practical applicability. Here, we proposed a novel meta-device integrating PB phase-based meta-lens, refractive lens, an electronically tunable lens with polarization camera capture multiple defocused images simultaneously the transport equation-based retrieval algorithm. By leveraging distinct focus lengths left-circularly polarized right-circularly light, eliminates need shots movements. Our approach enables rapid, precise, quantitative at different depths. The experiment shows accuracy our 98.47 % 2.52 mm depth range objects that can be retrieved, making it highly suitable dynamic depth-varying samples, in solution.
Language: Английский
Citations
2
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
Citations
1
Fundamental Research, Journal Year: 2024, Volume and Issue: 5(2), P. 556 - 570
Published: Nov. 12, 2024
Due to the exponentially growing global mobile data of wireless communications evolving from 5 G 6 in recent years, research activities leveraging terahertz (THz) waves obtain larger channel capacities have shown an ever-increasing pace and reached unprecedented height than before. Historically, past few decades already witnessed much progress THz generation detection technologies, which been recognized for a long time as bottleneck preventing being tamed by human beings. However, importance developing advanced components such antennas, transmission lines, filters, power amplimers, etc., constitute basic building blocks system, should not be overlooked sake exploiting spectra future communications, sensing imaging applications. While producing scannable highly-directive antenna beam proves indispensable period microwaves, significance functionality is more critical era, considering that intractable challenges severity free-space propagation losses, susceptibility atmospheric environments, unavailability efficient signal sources. This article structured under this background, dedicated reviewing several enabling beam-scanning concepts, structures, architectures developed systems. Specifically, we divide these solutions into four groups based on different mechanisms, i.e., mechanical motion, phased array, frequency beam-scanning, reconfigurable metasurfaces.
Language: Английский
Citations
6
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(30), P. 39906 - 39916
Published: July 18, 2024
Structured light three-dimensional (3D) imaging technology captures the geometric information on 3D objects by recording waves reflected from objects' surface. The projection angle and point number of laser dots directly determine field-of-view (FOV) resolution reconstructed image. Conventionally, diffractive optical elements with micrometer-scale pixel size have been used to generate dot arrays, leading limited FOV within path. Here, we theoretically put forward experimentally demonstrate a monocular phase metasurface composed deep subwavelength meta-atoms 10 798 array an 163°. Attributed vast high-density cloud generated metasurface, results showcase maximum relative error in depth 5.3 mm reconstruction 6.07%. Additionally, propose spin-multiplexed design method capable doubling lattice points. We its application field through experiments, where show 0.44 cm 2.78%. Our proposed featuring advanced generation holds substantial potential for various applications such as facial recognition, autonomous driving, virtual reality, beyond.
Language: Английский
Citations
4
Nanophotonics, Journal Year: 2025, Volume and Issue: 14(4), P. 429 - 447
Published: Feb. 3, 2025
Abstract Empowering nanophotonic devices via artificial intelligence (AI) has revolutionized both scientific research methodologies and engineering practices, addressing critical challenges in the design optimization of complex systems. Traditional methods for developing are often constrained by high dimensionality spaces computational inefficiencies. This review highlights how AI-driven techniques provide transformative solutions enabling efficient exploration vast spaces, optimizing intricate parameter systems, predicting performance advanced materials with accuracy. By bridging gap between complexity practical implementation, AI accelerates discovery novel functionalities. Furthermore, we delve into emerging domains, such as diffractive neural networks quantum machine learning, emphasizing their potential to exploit photonic properties innovative strategies. The also examines AI’s applications areas, e.g., optical image recognition, showcasing its role device integration. facilitating development highly efficient, compact devices, these AI-powered paving way next-generation systems enhanced functionalities broader applications.
Language: Английский
Citations
0
Optics Letters, Journal Year: 2025, Volume and Issue: 50(9), P. 3002 - 3002
Published: April 17, 2025
Coherent perfect absorption (CPA) dependent on orbital angular momentum (OAM) has been proposed theoretically but so far lacked experimental validation. Here, we design an OAM-selective coherent absorber and experimentally validate this intriguing phenomenon. By combining a spiral phase plate, polarization-conversion metasurface, conical cavity, incident plane wave of linear polarization is converted into cylindrical waves with different OAMs in two dimensions, which impinges dual-layer composed ceramic core indium tin oxide (ITO) coating. Experimental results, coinciding well numerical simulations, confirm the CPA for OAMs. Our findings offer practical approach electromagnetic energy harvesting sensing at subwavelength dimensions.
Language: Английский
Citations
0
Sensors, Journal Year: 2025, Volume and Issue: 25(11), P. 3281 - 3281
Published: May 23, 2025
This article presents an innovative design of a tachometric anemometer for measuring wind velocity and direction, which does not contain electronic components systems or power supply in the measurement area. device can be used extremely unfavourable environmental operating conditions, locations exposed to direct atmospheric discharges, conditions requiring restrictive intrinsic safety, special military applications, measurements presence extreme electromagnetic fields. An optical–mechanical transducer is anemometer. generates light pulse signal, frequency function flow velocity, duty cycle direction. signal transmitted via optical fibre from sensor assembly station, located outside The simple, durable, resistant conditions.
Language: Английский
Citations
0
Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)
Published: May 29, 2024
Based on the principle of light refraction and binocular ranging, underwater imaging model is obtained. It provides a theoretical basis for camera calibration. In order to meet requirement vehicle identify distance target, new measurement system based semantic segmentation vision proposed. The uses Deeplabv3 + target captured by generate map, which then used ranging. Compared with ranging using original drawing, accuracy proposed method has not changed, speed increased 30%, error rate controlled within 5%, meets needs robot operations.
Language: Английский
Citations
3