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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 AccessDynamic multicolor emissions of multimodal phosphors by Mn2+ trace doping in self-activated CaGa4O7
Achieving dynamic multimodal luminescence in a single material is promising but challenging. Here, the authors engineer a phosphor with dynamic multicolor luminescence and photo-thermomechanically responsive emissions by adding Mn2+ to a self-activated CaGa4O7 host.
- Yiqian Tang
- , Yiyu Cai
- & Jun-Cheng Zhang
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Article
| Open AccessOrigami metamaterials for ultra-wideband and large-depth reflection modulation
The researchers fuse metamaterials and origami technical to achieve ultra-wideband and large-depth reflection modulation. Flexible electronics amplify its lightweight, transparency, and cost-effectiveness, making it ideal for satellite communications.
- Zicheng Song
- , Juan-Feng Zhu
- & Cheng-Wei Qiu
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| Open AccessBright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design
The device performance of pure-green hyperfluorescent organic light-emitting diodes remains unsatisfactory. Here, the authors report multi-resonance emitters with extended π−conjugation or increased donor strength, resulting in bright, efficient and stable pure-green hyperfluorescent devices.
- Yi-Ting Lee
- , Chin-Yiu Chan
- & Chihaya Adachi
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| Open AccessPhotonic-electronic integrated circuit-based coherent LiDAR engine
The researchers showcase a photonic-electronic FMCW LiDAR source composed of a micro-electronic based high-voltage arbitrary waveform generator, a photonic circuit-based tunable Vernier laser with piezoelectric actuators, and an erbium-doped waveguide amplifier.
- Anton Lukashchuk
- , Halil Kerim Yildirim
- & Tobias J. Kippenberg
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| 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 AccessRoom-temperature quantum emission from interface excitons in mixed-dimensional heterostructures
Interlayer excitons in 2D homo- and heterostructures have been intensively investigated due to their emerging optical properties. Here, the authors report the observation of interface excitons in 1D/2D carbon nanotube/WSe2 heterostructures, showing evidence of photon antibunching at room temperature.
- N. Fang
- , Y. R. Chang
- & Y. K. Kato
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| Open AccessGiant Faraday rotation in atomically thin semiconductors
Here, the authors perform Faraday rotation spectroscopy around the excitonic transitions in hBN-encapsulated WSe2 and MoSe2 monolayers, and interlayer excitons in MoS2 bilayers. They measure a large Verdet constant - 1.9 × 107 deg T−¹cm−¹ for monolayers, and attribute it to the giant oscillator strength and high g-factor of the excitons.
- Benjamin Carey
- , Nils Kolja Wessling
- & Ashish Arora
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Article
| Open AccessObservation of spatiotemporal optical vortices enabled by symmetry-breaking slanted nanograting
A microscale platform composed of a slanted nanograting is experimentally demonstrated to efficiently generate spatiotemporal optical vortex. This approach paves the way towards an integrated system for ultrafast pulse shaping.
- Pengcheng Huo
- , Wei Chen
- & Ting Xu
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Article
| Open AccessA 2D chiral microcavity based on apparent circular dichroism
Here the authors induce asymmetric transmission in planar Fabry–Pérot microcavities by embedding organic thin films exhibiting apparent circular dichroism (ACD), an optical phenomenon based on 2D chirality.
- Tzu-Ling Chen
- , Andrew Salij
- & Randall H. Goldsmith
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Article
| Open AccessLarge-volume focus control at 10 MHz refresh rate via fast line-scanning amplitude-encoded scattering-assisted holography
This study presents a wavefront shaping scheme to control optical focus in a large 3D space at the unprecedented rate of 30 MHz with micron-scale precision and random accessibility via reallocation of degrees of freedom in spatiotemporal domain.
- Atsushi Shibukawa
- , Ryota Higuchi
- & Mooseok Jang
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Article
| Open AccessOptics miniaturization strategy for demanding Raman spectroscopy applications
Authors present a centimeter-scale miniaturized Raman spectrometer using cheap nonstabilized laser diodes, densely packed optics, and non-cooled small sensors while the performance is comparable with expensive bulky research-grade Raman systems.
- Oleksii Ilchenko
- , Yurii Pilhun
- & Anja Boisen
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| Open AccessOnion-like multicolor thermally activated delayed fluorescent carbon quantum dots for efficient electroluminescent light-emitting diodes
Shi et al. report the synthesis of multicolour thermally activated delayed fluorescent carbon dots with 3D onion-like configuration to stabilise the triplet state and reduce the singlet-triplet energy gap. LEDs with EQE of 6.0–9.9% are achieved, a step further for efficient and stable displays.
- Yuxin Shi
- , Yang Zhang
- & Louzhen Fan
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| Open AccessModified t-butyl in tetradentate platinum (II) complexes enables exceptional lifetime for blue-phosphorescent organic light-emitting diodes
It has been challenging to realize efficient and stable blue phosphorescent organic light-emitting diodes. Here, authors explore the effect of substitution position in platinum(II) dopants with suppressed metal-metal-to-ligand charge transfer features, resulting in prolonged lifetime in the devices.
- Young Hun Jung
- , Gyeong Seok Lee
- & Jang Hyuk Kwon
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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 AccessAn all-optical multidirectional mechano-sensor inspired by biologically mechano-sensitive hair sensilla
Hair-like sensilla are evolved widely in organisms that perceive mechanical signals. Here, the authors report an all-optical mechano-sensor that can detect the real-time, directional displacement and force at several nm and μN levels.
- Yuxiang Li
- , Zhihe Guo
- & Xiang Wu
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Article
| Open AccessIntercavity polariton slows down dynamics in strongly coupled cavities
Band engineering in optics allows the design of unconventional forms of light with potential optoelectronic applications. Here, the authors realize slow-light intercavity polaritons in an array of coupled cavities, the photonic architecture enables the spatial segregation of photons and excitons
- Yesenia A. García Jomaso
- , Brenda Vargas
- & Giuseppe Pirruccio
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Article
| Open AccessLarge area single crystal gold of single nanometer thickness for nanophotonics
2D metallic single crystals are sought after for nanophotonic applications, but their synthesis remains challenging. Here, the authors report an atomic level precision etching method to fabricate large-area crystalline gold flakes with nanometre thickness, showing enhanced plasmonic and nonlinear optical properties.
- Chenxinyu Pan
- , Yuanbiao Tong
- & Pan Wang
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| 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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| Open AccessHighly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter
The realization of a BT.2020 blue emitter is challenging due to the spectral redshift associated with π-extension. Here, the authors report a multi-resonance thermally activated delayed fluorescence emitter, exhibiting ultrapure deep-blue narrow emission and CIEy ≤ 0.05 exceeding 20% efficiency.
- Junki Ochi
- , Yuki Yamasaki
- & Takuji Hatakeyama
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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 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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| Open AccessMonolithic back-end-of-line integration of phase change materials into foundry-manufactured silicon photonics
The foundry-compatible platform could facilitate integration of phase change materials for reconfigurable photonics and open up the possibility of integrating excellent optoelectronic materials into future silicon photonic process design kits.
- Maoliang Wei
- , Kai Xu
- & Hongtao Lin
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Article
| Open AccessMachine-learning-assisted and real-time-feedback-controlled growth of InAs/GaAs quantum dots
Finding the process parameters in molecular beam epitaxy for a specific density of quantum dots is a multidimensional optimization challenge. Here, the authors demonstrate real-time feedback controlled self-assembled InAs/GaAs QDs growth based on machine learning (ML) outputs.
- Chao Shen
- , Wenkang Zhan
- & Zhanguo Wang
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| Open AccessEfficient excitation and control of integrated photonic circuits with virtual critical coupling
The authors achieve enhanced cavity loading using complex-frequency excitations that can tailor on-demand the effective coupling rate in a microring resonator by precisely controlling the temporal evolution of the incident pulses.
- Jakob Hinney
- , Seunghwi Kim
- & Michal Lipson
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Article
| Open AccessRaman time-delay in attosecond transient absorption of strong-field created krypton vacancy
The advent of isolated attosecond XUV pulse sources marks a new era in attosecond science, pivotal for the investigation of core electron dynamics. Here the authors discover that the coherent Raman coupling between the cation states leads to extra timedelay between different transition channels by applying the attosecond transient absorption spectroscopy on the investigation of complex dynamics of strong field ionization of Krypton.
- Li Wang
- , Guangru Bai
- & Zengxiu Zhao
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Article
| Open AccessOne-photon three-dimensional printed fused silica glass with sub-micron features
3D-printed glass holds great potential. However, it is challenging to control both the dimension and the resolution of the printed material. Here, authors present a one-photon 3D printing approach to produce high-performance fused silica glass with sub-micron resolution and millimetric dimensions.
- Ziyong Li
- , Yanwen Jia
- & Xiewen Wen
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Article
| Open AccessQuantifying the interfacial triboelectricity in inorganic-organic composite mechanoluminescent materials
Mechanoluminescence enables sensing applications of mechanical stimuli. Here, the authors reveal the importance of interfacial triboelectricity to this phenomenon in inorganic-organic composite materials.
- Xin Pan
- , Yixi Zhuang
- & Rong-Jun Xie
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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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| Open AccessDemonstration of hypergraph-state quantum information processing
Usual multiqubit entangled states can be described using the graph formalism, where each edge connects only two qubits. Here, instead, the authors use a reprogrammable silicon photonics chip to showcase preparation, verification and processing of arbitrary four-qubit hypergraph states, where hyperedges describe entanglement within a subset of many qubits.
- Jieshan Huang
- , Xudong Li
- & Jianwei Wang
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Article
| Open AccessTunable anisotropic van der Waals films of 2M-WS2 for plasmon canalization
Anisotropic light-matter excitations in van der Waals materials are expected to have an impact on nanophotonics applications. Here, the authors report the observation of canalized in-plane mid-infrared plasmons in the semimetallic phase of WS2 and demonstrate their electrical tunability via ion intercalation.
- Qiaoxia Xing
- , Jiasheng Zhang
- & Hugen Yan
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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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| Open AccessLarge exchange-driven intrinsic circular dichroism of a chiral 2D hybrid perovskite
Li et al. report large circular dichroism in 2D chiral perovskite single crystals, arises from the inorganic sublattice, instead of chiral ligands, driven by electron-hole exchange interactions. This is evidenced by both reflective circular dichroism spectroscopy and ab initio theory.
- Shunran Li
- , Xian Xu
- & Peijun Guo
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Article
| Open AccessAn optofluidic antenna for enhancing the sensitivity of single-emitter measurements
Single molecule investigations are often performed in fluidic environments, but molecular diffusion and limited photon counts can compromise studies of processes with fast or slow dynamics. The authors introduce a planar optofluidic antenna which enhances the fluorescence signal from molecules, applicable to a diverse range of studies.
- Luis Morales-Inostroza
- , Julian Folz
- & Vahid Sandoghdar
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| 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 AccessHigh performance artificial visual perception and recognition with a plasmon-enhanced 2D material neural network
Here, the authors demonstrate a low-power neuromorphic visual architecture based on a plasmon-enhanced 2D semiconductor phototransistor array, showing high-speed sensing, preprocessing and image recognition functionalities.
- Tian Zhang
- , Xin Guo
- & Linjun Li
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| 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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| Open AccessDirect space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field
Here the authors propose a mechanism for direct space-time manipulation of ultrafast light field and experimentally demonstrate the generation of a spatiotemporally coupling light spring with a broad topological charge bandwidth.
- Qinggang Lin
- , Fu Feng
- & Xiaocong Yuan
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| 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 AccessUltrasound-induced reorientation for multi-angle optical coherence tomography
Accessing multi-angle views of organoids is important for biology and oncology. The authors propose ultrasound-induced reorientation for multi-angle optical coherence tomography, using a 3D-printed acoustic trap to levitate and rotate samples with a model-based algorithm for reconstruction.
- Mia Kvåle Løvmo
- , Shiyu Deng
- & Monika Ritsch-Marte
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Article
| Open AccessAssessing intra- and inter-molecular charge transfer excitations in non-fullerene acceptors using electroabsorption spectroscopy
The performance of Y6-containing donor-acceptor active layers in organic solar cells is highly related to the charge-transfer nature in Y6 aggregates. Here, authors study charge-transfer characteristics of excitations of isolated and aggregated Y6 molecules through electroabsorption spectroscopy.
- Sudhi Mahadevan
- , Taili Liu
- & Sai-Wing Tsang
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Article
| Open AccessCavity-coupled telecom atomic source in silicon
T centers in silicon are promising candidates for quantum applications yet suffer from weak optical transitions. Here, by integrating with a silicon nanocavity, the authors demonstrate an enhancement of the photon emission rate for a single T center.
- Adam Johnston
- , Ulises Felix-Rendon
- & Songtao Chen
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Article
| Open AccessPhotooxidation triggered ultralong afterglow in carbon nanodots
Biocompatible afterglow materials have potential in imaging applications, but are challenging to prepare. Here the authors report the development of carbon nanodots with near-infrared afterglow, and demonstrate their use in imaging for tumour resection.
- Guang-Song Zheng
- , Cheng-Long Shen
- & Chong-Xin Shan
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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 AccessCompact terahertz harmonic generation in the Reststrahlenband using a graphene-embedded metallic split ring resonator array
Compact sources in the frequency range of 6-12 THz are difficult to obtain due to optical phonon absorption in conventional III-V semiconductors. Here, the authors demonstrate third harmonic generation at 9.63 THz by optically pumping monolayer graphene coupled to a circular split ring resonator by using a semiconductor laser.
- Alessandra Di Gaspare
- , Chao Song
- & Miriam S. Vitiello
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Article
| Open AccessMonolithic thin-film lithium niobate broadband spectrometer with one nanometre resolution
A framework to break the inherent trade-off barrier between spectral resolution and operational bandwidth of integrated optical spectrometers is developed and demonstrated on thin-film lithium niobate without sacrificing the compact footprint.
- Giovanni Finco
- , Gaoyuan Li
- & Rachel Grange
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Article
| Open AccessUltra-compact exciton polariton modulator based on van der Waals semiconductors
Miniaturized and efficient optical modulators are desired for data transmission, processing and communication. Here, the authors report the fabrication of exciton-polariton Mach–Zehnder modulators based on thin WS2 waveguides with a footprint of ~30 μm², modulation ratio up to −6.20 dB and nanosecond response times.
- Seong Won Lee
- , Jong Seok Lee
- & Su-Hyun Gong
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Article
| Open AccessSubwavelength dielectric waveguide for efficient travelling-wave magnetic resonance imaging
Achieving uniform spin excitation, crucial for MRI, is challenging in the electrically large human body at UHF. Here, authors introduce an innovative dielectric waveguide specifically designed for traveling-wave MRI, which enhances homogeneity and efficiency through effective wave manipulation.
- Yang Gao
- , Tong Liu
- & Xiaotong Zhang
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Article
| Open AccessTime-of-flight detection of terahertz phonon-polariton
Polaritons, light-matter hybridized quasiparticles, are the fundamental excitation of strong coupling systems and are widely applicable in information technologies. Here the authors applied the concept of time-of-flight measurement in terahertz induced second harmonic generation experiments in various systems to comprehensively study the dispersion relation of phonon-polaritons and reveal potential spin-lattice couplings.
- Tianchuang Luo
- , Batyr Ilyas
- & Nuh Gedik