Featured
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| Open AccessAll-silicon multidimensionally-encoded optical physical unclonable functions for integrated circuit anti-counterfeiting
The researchers introduce an all-silicon optical PUF that enhances IoT device security through CMOS-compatible fabrication, showcasing five unique optical responses per pixel for advanced authentication and high information entropy.
- Kun Wang
- , Jianwei Shi
- & Deren Yang
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Article
| Open AccessA terahertz meta-sensor array for 2D strain mapping
The researchers showcase a flexible meta-sensor array based on classical Mie resonance, enabling precise detection of in-plane strain direction and magnitude using dynamically transmitted terahertz (THz) signals. The sensor array holds immense promise for the real-life applications as it possesses high sensor density and has a very large size up to (110 ×130 mm2).
- Xueguang Lu
- , Feilong Zhang
- & Qiang Cheng
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Article
| Open AccessWide field-of-hearing metalens for aberration-free sound capture
Achieving a wide angular response in single layer acoustic metalenses is challenging. By leveraging perfect acoustic symmetry conversion, the authors realize an aberration free metalens with a wide field-of-hearing, up to 140 degrees.
- Dongwoo Lee
- , Beomseok Oh
- & Junsuk Rho
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Article
| Open AccessA metasurface-based full-color circular auto-focusing Airy beam transmitter for stable high-speed underwater wireless optical communications
Authors present an adaptive underwater optical communication (UWOC) technology based on multi-wavelength lasers and a full-color metasurface for converting visible-band Gaussian to circular autofocusing Airy beams. The potential of Airy beams to mitigate optical power degradation is demonstrated, enabling stable data rate transmission via 4 K video transmission for these systems.
- Junhui Hu
- , Zeyuan Guo
- & Chao Shen
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Article
| Open AccessCompact meta-differentiator for achieving isotropically high-contrast ultrasonic imaging
High-contrast ultrasonic imaging holds significant importance in biomedical and engineering applications. Here, the authors present a compact spatial differentiator tailored for underwater isotropic edge-enhanced imaging, facilitating the realization of high-contrast ultrasonic imaging.
- Yurou Jia
- , Suying Zhang
- & Xiaojun Liu
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Article
| Open AccessExperimentally realized physical-model-based frugal wave control in metasurface-programmable complex media
Using a compact physics-based model, the authors experimentally achieve coherent wave control in metasurface-programmable complex systems with surprisingly frugal protocols (e.g., without ever measuring phase).
- Jérôme Sol
- , Hugo Prod’homme
- & Philipp del Hougne
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Article
| Open AccessDynamic switching from coherent perfect absorption to parametric amplification in a nonlinear spoof plasmonic waveguide
The authors propose a nonlinear spoof plasmonic waveguide to realize coherent perfect absorption and parametric amplification at the same frequency, which opens a new route to actively modulate the electromagnetic waves with giant amplification-to-absorption contrast.
- Wen Yi Cui
- , Jingjing Zhang
- & Tie Jun Cui
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Article
| Open AccessIntelligent wireless power transfer via a 2-bit compact reconfigurable transmissive-metasurface-based router
The rapid emergence of the Internet of Things has led to new power supply challenges. Here, authors propose a compact wireless power transfer framework that can intelligently deliver wireless power to devices in dynamic environments and simultaneously transfer information.
- Wenzhi Li
- , Qiyue Yu
- & Jiaran Qi
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Article
| Open AccessHyperbolic metamaterial empowered controllable photonic Weyl nodal line semimetals
One-dimensional photonic crystals provide a platform to modulate Weyl quasiparticles with properties of bound states in the continuum both dynamically (transition and rotation) and topologically (singularities in bilateral drumhead surface states).
- Shengyu Hu
- , Zhiwei Guo
- & Hong Chen
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Article
| Open AccessHigh-security learning-based optical encryption assisted by disordered metasurface
In this work, the employment of disordered metasurface as an ultra-stable and actively polarized speckle generator in a passive manner, coupled with a double-secure treatment to the plaintext, enables a highly secure speckle-based cryptosystem.
- Zhipeng Yu
- , Huanhao Li
- & Puxiang Lai
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Article
| Open AccessAmber rainbow ribbon effect in broadband optical metamaterials
The researchers showcased a negative Goos-Hänchen effect in film samples across the entire visible spectrum and discovered an amber rainbow ribbon and an optical black hole where little light leaks out due to perfect back reflection.
- Jing Zhao
- , Xianfeng Wu
- & Xiaopeng Zhao
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Article
| Open AccessUltrafast all-optical second harmonic wavefront shaping
Enhancing the data encoding into the orbital angular momentum of light beams could enable faster and more efficient optical communications. This work demonstrates complex control of the second harmonic wavefront with dynamics solely limited by the pulse duration.
- Artem Sinelnik
- , Shiu Hei Lam
- & Isabelle Staude
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Article
| Open AccessTwisted photonic Weyl meta-crystals and aperiodic Fermi arc scattering
Fermi arcs show unpredictable diffraction features resulting from their long-range scattering order in aperiodic systems. Here, authors continuously twist a bi-block Weyl meta-crystal and experimentally observe the twisted Fermi arc reconstruction.
- Hanyu Wang
- , Wei Xu
- & Biao Yang
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Article
| Open AccessPoincaré sphere trajectory encoding metasurfaces based on generalized Malus’ law
Polarization serves as an excellent information encoding carrier. Here, authors expand the metasurface encoding dimensionality of polarization information by engineering the Poincaré Sphere trajectory with generalized Malus’ law, unveiling new opportunities for advanced polarization optics.
- Zi-Lan Deng
- , Meng-Xia Hu
- & Andrea Alù
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Article
| Open AccessAnomalous and Chern topological waves in hyperbolic networks
Here the authors experimentally demonstrate the anomalous and Chern topological phases in a hyperbolic non-reciprocal scattering network, establishing unidirectional channels to induce new and exciting wave transport properties in curved spaces.
- Qiaolu Chen
- , Zhe Zhang
- & Romain Fleury
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Article
| Open AccessBroadband angular spectrum differentiation using dielectric metasurfaces
Metasurfaces processing incoming images have been proposed in the context of real space operations. Here, the authors demonstrate mathematical operations, such as differentiation, on the angular spectrum of an image using metasurfaces, which can be used to enhance spectral features of an image.
- Ming Deng
- , Michele Cotrufo
- & Lin Chen
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Article
| Open AccessTwisted moiré conductive thermal metasurface
Authors control heat transfer through twisting moiré conductive thermal metasurface, showcasing the potential for manipulating thermal conductivity and temperature gradients with imitated magic angles, thereby realizing multifunctional thermal metadevices.
- Huagen Li
- , Dong Wang
- & Cheng-Wei Qiu
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Article
| Open AccessWandering principal optical axes in van der Waals triclinic materials
Principal optical axes define light-matter interactions in crystals and they are usually assumed to be stationary. Here, the authors report the observation of wavelength-dependent principal optical axes in ternary van der Waals crystals (ReS2 and ReSe2), leading to wavelength-switchable propagation directions of their waveguide modes.
- Georgy A. Ermolaev
- , Kirill V. Voronin
- & Kostya S. Novoselov
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Article
| Open AccessObservation of continuum Landau modes in non-Hermitian electric circuits
Non-Hermitian systems have many physical properties without Hermitian counterparts. Here, the authors demonstrate a non-Hermitian topolectrical circuit hosting continuous bound states under pseudomagnetic fields with no counterparts in Hermitian systems.
- Xuewei Zhang
- , Chaohua Wu
- & Gang Chen
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Article
| Open AccessBroadband thermal imaging using meta-optics
Exploring the miniaturization of imaging systems, researchers use inverse-design for broadband meta-optics in the LWIR spectrum. Here, authors achieve a six-fold Strehl ratio improvement in image quality over conventional metalenses using a novel design and computational techniques.
- Luocheng Huang
- , Zheyi Han
- & Arka Majumdar
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Article
| Open AccessVision-driven metasurfaces for perception enhancement
Authors showcase a framework for visual perception enhancement system based on vision-driven metasurfaces. It can help humans obtain information in multiple frequency bands and allows the metasurface platform with more interesting functions.
- Tianshuo Qiu
- , Qiang An
- & Shaobo Qu
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Article
| Open AccessMeasuring entanglement entropy and its topological signature for phononic systems
Entanglement entropy exhibits rich phenomenology connected to different kinds of phases in condensed matter. Here, the authors confirm some of these predictions by experimentally probing nonlocal correlations in 1D and 2D phononic crystal based on interconnected resonating acoustic cavities.
- Zhi-Kang Lin
- , Yao Zhou
- & Jian-Hua Jiang
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Article
| Open AccessDynamic light manipulation via silicon-organic slot metasurfaces
In this work, the authors present an active optical metasurface based on a silicon-organic platform. The metasurface can modulate the amplitude of a reflected beam via electric voltage actuation lower than ± 17V.
- Tianzhe Zheng
- , Yiran Gu
- & Andrei Faraon
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Article
| Open AccessRealization of all-band-flat photonic lattices
Here the authors experimentally realized a systematic approach to synthesize arbitrary-size two-dimensional all-band-flat photonic lattices, which pave a route for investigating flat-band related physics such as slow-light, nonlinear breathing, and dispersionless image transmission.
- Jing Yang
- , Yuanzhen Li
- & Fei Gao
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Article
| Open AccessThe effect of echoes interference on phonon attenuation in a nanophononic membrane
Coherent scattering of phonons in a periodic nanostructure leads to interference, which modifies phonon energies. Here, authors observed that a strong interference effect also influences phonon lifetime. Despite its reduction, energy transport is conserved thanks to a hopping of energy among the reflected waves.
- Mohammad Hadi
- , Haoming Luo
- & Valentina M. Giordano
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Article
| Open AccessOptical Tellegen metamaterial with spontaneous magnetization
Here the authors propose an isotropic three-dimensional metamaterial with nonreciprocal magnetoelectric resonant responses at visible and mid-infrared frequencies. The proposed metamaterials do not require external magnetization.
- Shadi Safaei Jazi
- , Ihar Faniayeu
- & Viktar Asadchy
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Article
| Open AccessLinear and phase controllable terahertz frequency conversion via ultrafast breaking the bond of a meta-molecule
The time-varying metasurfaces show promise for exploring exotic physics and photonic applications. The authors introduce a time-varying metasurface with superconductor-metal hybrid meta-molecules, demonstrating phase-controllable frequency conversion with high efficiency.
- Siyu Duan
- , Xin Su
- & Peiheng Wu
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Article
| Open AccessClocked dynamics in artificial spin ice
Artificial spin ices are nanomagnetic metamaterials, whose collective magnetization self-organizes into extended domains. However, controlling when, where and how domains change has proven difficult, yet is crucial for technological applications. Here, Jensen and Strømberg et al. introduce astroid clocking, which enables controlled, stepwise growth and reversal of magnetic domains, using only global fields.
- Johannes H. Jensen
- , Anders Strømberg
- & Erik Folven
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Article
| Open AccessA dual-selective thermal emitter with enhanced subambient radiative cooling performance
Radiative cooling is a sustainable subambient cooling technology. Here, authors show a scalable and practical design of a dual-selective thermal emitter that is shown to have enhanced radiative cooling potential over existing typical designs.
- Xueke Wu
- , Jinlei Li
- & Rufan Zhang
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Article
| Open AccessCreating pairs of exceptional points for arbitrary polarization control: asymmetric vectorial wavefront modulation
The authors report the chiral inversion of exceptional points (EPs) through a structural mirror-symmetric operation, extending the application of EP to any desired polarization states, surpassing the inherent limitation of conventional EP systems.
- Zijin Yang
- , Po-Sheng Huang
- & Qinghua Song
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Perspective
| Open AccessPlanar hyperbolic polaritons in 2D van der Waals materials
In this Perspective, the authors illustrate the physics of hyperbolic polaritons in anisotropic 2D and 1D materials, proposing new potential material candidates, forward looking opportunities and technological applications.
- Hongwei Wang
- , Anshuman Kumar
- & Tony Low
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Article
| Open AccessDual-wavelength metalens enables Epi-fluorescence detection from single molecules
The requirement for sophisticated objective lenses hinders the miniaturisation of single molecule fluorescence spectroscopy for portable sensing applications. Here, the authors demonstrate a dual-wavelength metalens for real-time monitoring of individual fluorescent nanoparticles.
- Aleksandr Barulin
- , Yeseul Kim
- & Inki Kim
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Article
| Open AccessHigh quality factor metasurfaces for two-dimensional wavefront manipulation
Wavefront manipulation with metasurfaces is typically limited to low quality factors. Here, the authors show how higher-order Mie modes can be leveraged to design high quality factor optical metasurfaces for wavefront manipulation in two dimensions.
- Claudio U. Hail
- , Morgan Foley
- & Harry A. Atwater
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Article
| Open AccessAll-optical geometric image transformations enabled by ultrathin metasurfaces
Metasurfaces enable all-optical geometric coordinate transformations, converting images with altered pixel spatial relations, which can facilitate fast, energy-efficient preprocessing for tasks like object tracking, or aid in laser manufacturing.
- Xingwang Zhang
- , Xiaojie Zhang
- & Xingjie Ni
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Article
| Open AccessReal-data-driven real-time reconfigurable microwave reflective surface
The authors demonstrate how flexible metasurfaces powered by artificial neural network can dynamically manipulate the EM scattering behavior from an arbitrary surface - an ultimate ambition for many EM stealth and communication problems.
- Erda Wen
- , Xiaozhen Yang
- & Daniel F. Sievenpiper
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Article
| Open AccessUltrasmall and tunable TeraHertz surface plasmon cavities at the ultimate plasmonic limit
In this work, the authors use a surface plasmonic mechanism to efficiently confine TeraHertz photons inside ultrasmall cavities. These plasmonic-based TeraHertz cavities are shown to operate until the ultimate limit that is allowed fundamentally and at which plasmons start to behave in a nonlocal fashion.
- Ian Aupiais
- , Romain Grasset
- & Yannis Laplace
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Article
| Open AccessDynamic construction of refractive index-dependent vibrations using surface plasmon-phonon polaritons
Molecular vibrations serve as valuable signatures for the constituent elements and bonding in compounds. Here, using Surface-Enhanced Infrared Absorption spectroscopy, the authors study refractive index dependent vibrations of surface phonon polaritons and surface plasmon platform, targeting dynamic biomonitoring.
- Hong Zhou
- , Zhihao Ren
- & Chengkuo Lee
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Article
| Open AccessMetafiber transforming arbitrarily structured light
Structured light has proven useful for numerous photonic applications. However, its current use in optical fibers is severely limited. The authors report a highly integrated metafiber platform based on 3D laser nanoprinting, capable of creating arbitrarily structured light.
- Chenhao Li
- , Torsten Wieduwilt
- & Haoran Ren
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Article
| Open AccessMultipole engineering by displacement resonance: a new degree of freedom of Mie resonance
Mie resonances are typically manipulated through varying nanostructure shape/size. Here, authors found that Gaussian beam displacement excites higher-order multipolar modes, not accessible by plane wave, featuring maximal linear and nonlinear scattering efficiency when the focus is misaligned.
- Yu-Lung Tang
- , Te-Hsin Yen
- & Shi-Wei Chu
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Article
| Open AccessDisordered metasurface enabled single-shot full-Stokes polarization imaging leveraging weak dichroism
Polarization imaging can capture information from the scene that cannot directly be recorded by traditional intensity cameras. Here, authors demonstrate a single-shot full Stokes polarization camera incorporating a disordered metasurface array with weak dichroism.
- Qingbin Fan
- , Weizhu Xu
- & Ting Xu
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Article
| Open AccessNegative capacitors and inductors enabling wideband waveguide metatronics
The authors showcase a method to design negative lumped elements by engineering the effective permittivity within the waveguide, which enables realizations of wideband waveguide metatronics and promises performance enhancement in various fields.
- Xu Qin
- , Pengyu Fu
- & Yue Li
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Article
| Open AccessMetasurface-empowered snapshot hyperspectral imaging with convex/deep (CODE) small-data learning theory
Hyperspectral imagers play a vital role in material identification, but traditionally, they have been bulky. Here, the authors introduce a compact hyperspectral imaging system that combines metasurface optics with small-data deep learning.
- Chia-Hsiang Lin
- , Shih-Hsiu Huang
- & Pin Chieh Wu
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Article
| Open AccessAsymptotic dispersion engineering for ultra-broadband meta-optics
The authors present a comprehensive framework for on-demand dispersion control with a single-layer metasurface, particularly in an ultra-broad bandwidth. An achromatic metalens spanning the visible and near-infrared spectra is experimentally demonstrated.
- Yueqiang Hu
- , Yuting Jiang
- & Huigao Duan
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Article
| Open AccessCascaded metasurfaces for high-purity vortex generation
The authors demonstrate an efficient way to generate high-purity vortex beams by applying optical neural networks to cascaded phase-only metasurfaces. Specifically, they present record-high-quality Laguerre-Gaussian (LGp,l) optical modes with polynomial orders p = 10 and l = 200 with purity in p, l and relative conversion efficiency of 96%, 85%, and 70%, respectively.
- Feng Mei
- , Geyang Qu
- & Shumin Xiao
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Article
| Open AccessMorphogenetic metasurfaces: unlocking the potential of turing patterns
Inspired by Alan Turing’s last works on morphogenesis, this research introduces a technique for generating metasurfaces through the emergence of anisotropic patterns capable of self-structuring in response to electromagnetic constraints.
- Thomas Fromenteze
- , Okan Yurduseven
- & Cyril Decroze
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Article
| Open AccessTransmission-type photonic doping for high-efficiency epsilon-near-zero supercoupling
The authors present a transmission-type doping approach to reduce resonant losses in photonic doping. Assisted by the approach, proximate ideal epsilon-near-zero (ENZ) supercoupling with neartotal energy transmission and zero-phase advance is achieved in experiments.
- Wendi Yan
- , Ziheng Zhou
- & Yue Li
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Article
| Open AccessSynthesis of a covalent organic framework with hetero-environmental pores and its medicine co-delivery application
The characteristics of the pores are vital for controlling the performance of covalent organic frameworks, but obtaining different chemical environments in different pores is challenging. Here, the authors report the development of covalent organic frameworks with differing pore environments.
- Wenyan Ji
- , Pai Zhang
- & Bao-Hang Han
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Article
| Open AccessHigh-performance cost efficient simultaneous wireless information and power transfers deploying jointly modulated amplifying programmable metasurface
In this work, the authors demonstrate a ‘jointly modulated’ amplifying programmable metasurface (APM) for simultaneous wireless information and power transmission (SWIPT). Their technique outperforms existing methods, significantly improving power transmission and adaptability for conveying energy and data across various domains, including wireless implants, 6 G networks, and IoT systems.
- Xin Wang
- , Jia Qi Han
- & Tie Jun Cui
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Article
| Open AccessEfficiently accelerated free electrons by metallic laser accelerator
Accelerated electron beams are potentially useful for imaging and different type of light sources. Here the authors demonstrate electron acceleration using metallic laser acceleration with efficiency comparable to that of dielectric laser accelerators.
- Dingguo Zheng
- , Siyuan Huang
- & Jianqi Li