Inverse design enables large-scale high-performance meta-optics reshaping virtual reality

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: May 3, 2022

Abstract Meta-optics has achieved major breakthroughs in the past decade; however, conventional forward design faces challenges as functionality complexity and device size scale up. Inverse aims at optimizing meta-optics but been currently limited by expensive brute-force numerical solvers to small devices, which are also difficult realize experimentally. Here, we present a general inverse-design framework for aperiodic large-scale (20k × 20k λ 2 ) complex three dimensions, alleviates computational cost both simulation optimization via fast approximate solver an adjoint method, respectively. Our naturally accounts fabrication constraints surrogate model. In experiments, demonstrate aberration-corrected metalenses working visible with high aperture, poly-chromatic focusing, large diameter up centimeter scale. Such opens new paradigm applications, its potential future virtual-reality platforms using meta-eyepiece laser back-illuminated micro-Liquid Crystal Display.

Language: Английский

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Crosstalk-free achromatic full Stokes imaging polarimetry metasurface enabled by polarization-dependent phase optimization

Opto-Electronic Advances, Journal Year: 2022, Volume and Issue: 5(11), P. 220058 - 220058

Published: Jan. 1, 2022

Imaging polarimetry is one of the most widely used analytical technologies for object detection and analysis. To date, metasurface-based techniques are severely limited by narrow operating bandwidths inevitable crosstalk, leading to detrimental effects on imaging quality measurement accuracy. Here, we propose a crosstalk-free broadband achromatic full Stokes polarimeter consisting polarization-sensitive dielectric metalenses, implemented principle polarization-dependent phase optimization. Compared with single-polarization optimization method, average crosstalk has been reduced over three times under incident light arbitrary polarization ranging from 9 μm 12 μm, which guarantees state more precisely. The experimental results indicate that designed metalenses can effectively eliminate chromatic aberration selectivity negligible crosstalk. measured relative errors 7.08%, 8.62%, 7.15%, 7.59% at 9.3, 9.6, 10.3, 10.6 respectively. Simultaneously, capability device also verified. This work expected have potential applications in wavefront detection, remote sensing, light-field imaging, so forth.

Language: Английский

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Resonant leaky modes in all-dielectric metasystems: Fundamentals and applications

Physics Reports, Journal Year: 2023, Volume and Issue: 1008, P. 1 - 66

Published: Jan. 12, 2023

Language: Английский

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Electrically Tunable Bifocal Metalens with Diffraction‐Limited Focusing and Imaging at Visible Wavelengths

Advanced Science, Journal Year: 2021, Volume and Issue: 8(21)

Published: Sept. 5, 2021

Abstract Tunable optical devices powered by metasurfaces provide a new path for functional planar optics. In particular, lenses with tunable focal lengths can play key role in various fields applications imaging, displays, and augmented virtual reality devices. Here, the authors demonstrate an electrically controllable bifocal metalens at visible wavelengths incorporating metasurface designed to focus light two different lengths, liquid crystals actively manipulate length of through application external bias. By utilizing hydrogenated amorphous silicon that is optimized extremely low extinction coefficient regime, highly efficient measured focusing efficiencies around 44%. They numerically design experimentally realize characterize active imaging using combined crystals. Diffraction limited verified analysis intensities points modulation transfer function. The used modulated switching between planes, display images positive negative target objects.

Language: Английский

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A Progress Review on Solid‐State LiDAR and Nanophotonics‐Based LiDAR Sensors

Laser & Photonics Review, Journal Year: 2022, Volume and Issue: 16(11)

Published: Aug. 11, 2022

Abstract Light detection and ranging (LiDAR) sensors enable precision sensing of an object in 3D. LiDAR technology is widely used metrology, environment monitoring, archaeology, robotics. It also shows high potential to be applied autonomous driving. In traditional sensors, mechanical rotator for optical beam scanning, which brings about limitations on their reliability, size, cost. These can overcome by a more compact solid‐state solution. Solid‐state are commonly categorized into the following three types: flash‐based LiDAR, microelectromechanical system (MEMS)‐based phased array (OPA)‐based LiDAR. Furthermore, advanced optics enables novel nanophotonics‐based devices with superior advantages utilized sensor. this review, sensor principles introduced, including schemes: pulsed time flight (TOF), amplitude‐modulated continuous wave TOF, frequency‐modulated wave. Recent advances conventional summarized presented, MEMS‐based OPA‐based The recent progress emerging covered. A summary made future outlook provided.

Language: Английский

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Extreme‐Angle Silicon Infrared Optics Enabled by Streamlined Surfaces

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(11)

Published: Feb. 10, 2021

Abstract Infrared optical systems are indispensable in almost all domains of society, but their performances often restricted by bulky size, small field view, large thermal sensitivity, high fabrication cost, etc. Here, based on the concept catenary optics, a novel isophase streamline optimization approach is leveraged to design silicon complementary metal–oxide–semiconductor (CMOS)‐compatible metasurfaces with broadband, wide‐angle, and high‐efficiency performances, which breaks through glass ceiling traditional technologies. By using truly local geometric phase, maximum diffraction efficiency approaching 100% obtained ultrawide spectral angular ranges. Somewhat surprising results shown that wide‐angle diffraction‐limited imaging laser beam steering can be realized record view up 178°. This methodology scalable entire band other materials, enabling unprecedented compact infrared for surveillance, unmanned vehicles, medical science,

Language: Английский

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Applications of bound states in the continuum in photonics

Nature Reviews Physics, Journal Year: 2023, Volume and Issue: 5(11), P. 659 - 678

Published: Oct. 6, 2023

Language: Английский

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Artificial Intelligence in Meta-optics

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(19), P. 15356 - 15413

Published: June 24, 2022

Recent years have witnessed promising artificial intelligence (AI) applications in many disciplines, including optics, engineering, medicine, economics, and education. In particular, the synergy of AI meta-optics has greatly benefited both fields. Meta-optics are advanced flat optics with novel functions light-manipulation abilities. The optical properties can be engineered a unique design to meet various demands. This review offers comprehensive coverage synergy. After providing an overview meta-optics, we categorize discuss recent developments integrated by these two topics, namely for AI. former describes how apply research design, simulation, information analysis, application. latter reports development Al system computation via meta-optics. will also provide in-depth discussion challenges this interdisciplinary field indicate future directions. We expect that inspire researchers fields benefit next generation intelligent device design.

Language: Английский

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An achromatic metafiber for focusing and imaging across the entire telecommunication range

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: July 19, 2022

Dispersion engineering is essential to the performance of most modern optical systems including fiber-optic devices. Even though chromatic dispersion a meter-scale single-mode fiber used for endoscopic applications negligible, lenses located on end face focusing and imaging suffer from strong aberration. Here we present design nanoprinting 3D achromatic diffractive metalens fiber, capable performing polarization-insensitive across entire near-infrared telecommunication wavelength band ranging 1.25 1.65 um. This represents whole domain commercially fibers. The unlocked height degree freedom in nanopillar meta-atom largely increases upper bound time-bandwidth product an up 21.34, leading wide group delay modulation range spanning -8 14 fs. Furthermore, demonstrate use our compact flexible metafiber confocal imaging, creating in-focus sharp images under broadband light illumination. These results may unleash full potential meta-optics widespread hyperspectral femtosecond laser-assisted treatment, deep tissue wavelength-multiplexing communications, sensing, lasers.

Language: Английский

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Integrated metasurfaces for re-envisioning a near-future disruptive optical platform

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: June 20, 2023

Abstract Metasurfaces have been continuously garnering attention in both scientific and industrial fields, owing to their unprecedented wavefront manipulation capabilities using arranged subwavelength artificial structures. To date, research has mainly focused on the full control of electromagnetic characteristics, including polarization, phase, amplitude, even frequencies. Consequently, versatile possibilities wave achieved, yielding practical optical components such as metalenses, beam-steerers, metaholograms, sensors. Current is now integrating aforementioned metasurfaces with other standard (e.g., light-emitting diodes, charged-coupled devices, micro-electro-mechanical systems, liquid crystals, heaters, refractive elements, planar waveguides, fibers, etc.) for commercialization miniaturization trends devices. Herein, this review describes classifies metasurface-integrated components, subsequently discusses promising applications platforms those augmented/virtual reality, light detection ranging, In conclusion, presents several challenges prospects that are prevalent field order accelerate metasurfaces-integrated platforms.

Language: Английский

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