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| Open AccessReconfigurable image processing metasurfaces with phase-change materials
Researchers demonstrate that image-processing metasurfaces can be dynamically reconfigured by using phase-change materials. The work might lead to novel tunable devices for compact optical computing for applications in AR/VR and bio-medical imaging.
- Michele Cotrufo
- , Shaban B. Sulejman
- & Andrea Alù
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Article
| Open AccessHumidity-tolerant porous polymer coating for passive daytime radiative cooling
A consistency issue with the production of porous polymer-based radiative coatings can be a significant drop in the cooling performance when dried under humid conditions. This issue is efficiently resolved by adding polymer reinforcement.
- Dongpyo Hong
- , Yong Joon Lee
- & Sang Yoon Park
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Article
| Open AccessSteering and cloaking of hyperbolic polaritons at deep-subwavelength scales
Polaritons – hybrid light-matter excitations – in van der Waals materials hold promise for photonics applications below the diffraction limit. Here, the authors demonstrate in-plane steering and cloaking of phonon polaritons in assembled micro-structures based on α-MoO3 films with misaligned crystallographic orientations.
- Hanchao Teng
- , Na Chen
- & Qing Dai
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Article
| Open AccessStable pure-green organic light-emitting diodes toward Rec.2020 standard
It is essential to manipulate the dynamic behaviour of charge carriers and excitons in organic light-emitting diodes. Here, authors report the trapping of injected electrons by a thermally activated delayed fluorescence assistant molecule in a bipolar host matrix and achieve long device stability.
- Xun Tang
- , Tuul Tsagaantsooj
- & Chihaya Adachi
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| Open AccessInverted device architecture for high efficiency single-layer organic light-emitting diodes with imbalanced charge transport
Efficient organic light-emitting diodes require a multilayer architecture to confine charge recombination to the emissive layer. Here, authors demonstrate efficient single-layer devices for emitters with imbalanced charge transport without the need of additional charge transport or blocking layers.
- Xiao Tan
- , Dehai Dou
- & Gert-Jan A. H. Wetzelaer
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| Open AccessEfficient characterizations of multiphoton states with an ultra-thin optical device
Shadow tomography is efficient for quantum state characterization. Here, the authors implement shadow tomography on photonic states with a single metasurface, which alleviates the complexity in measurement
- Kui An
- , Zilei Liu
- & He Lu
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Article
| Open AccessRadiative cooling and indoor light management enabled by a transparent and self-cleaning polymer-based metamaterial
Transparent roofs offer a solution for harnessing natural light in sustainable buildings. Here, authors demonstrate a polymer-based metamaterial with micro-pyramid surface structures that diffuses sunlight while offering passive cooling and self-cleaning properties.
- Gan Huang
- , Ashok R. Yengannagari
- & Bryce S. Richards
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Article
| Open AccessControlling the broadband enhanced light chirality with L-shaped dielectric metamaterials
L-shaped silicon metamaterials are realized exhibiting broadband and enhanced chirality. The current work sets new benchmarks in the assembly of ultrathin dielectric chiral metamaterials that can efficiently control chiral light-matter interactions.
- Ufuk Kilic
- , Matthew Hilfiker
- & Christos Argyropoulos
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Article
| Open AccessDelayed room temperature phosphorescence enabled by phosphines
Room-temperature phosphorescence usually occurs immediately after the removal of excitation. Here the authors achieve combined instant and delayed phosphorescence through introduction of phosphines into carbazole emitters.
- Guang Lu
- , Jing Tan
- & Hui Xu
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| Open AccessBoosting organic phosphorescence in adaptive host-guest materials by hyperconjugation
Room-temperature phosphorescence is usually inefficient in purely organic material. Here, the authors achieve near-unity phosphorescence efficiency with color tunability in adaptive host-guest materials through use of hyperconjugation.
- Huili Ma
- , Lishun Fu
- & Wei Huang
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Article
| Open AccessDirect programming of confined surface phonon polariton resonators with the plasmonic phase-change material In3SbTe2
Tailored light-matter interaction can be achieved with surface phonon polaritons (SPhPs). Here, Conrads et al. employ the plasmonic phase-change material In3SbTe2 on the polar crystal SiC for direct programming of confined SPhP resonators and study their resonance modes via near-field microscopy.
- Lukas Conrads
- , Luis Schüler
- & Thomas Taubner
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Article
| Open AccessInkjet-printed optical interference filters
Optical interference filters are multilayer structures for controlling the propagation of electromagnetic waves. Jin et al. have developed a method of via inkjet printing to fabricate optical interference filters with commercially relevant quality with remarkable A4 paper size (29.7 × 21.0 cm²) in ambient conditions.
- Qihao Jin
- , Qiaoshuang Zhang
- & Uli Lemmer
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Article
| Open AccessExciton polariton condensation from bound states in the continuum at room temperature
Bound states in continuum have attracted attention in various platforms, and recently condensation of bound states in continuum polariton modes was demonstrated at low temperatures. Here the authors report the observation of such a state in a periodic air-hole perovskite-based photonic crystal at room temperature.
- Xianxin Wu
- , Shuai Zhang
- & Xinfeng Liu
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| Open AccessUltrastrong exciton-plasmon couplings in WS2 multilayers synthesized with a random multi-singular metasurface at room temperature
Here, the authors fabricate a metasurface with nanometre-sized plasmonic hotspots that interact coherently with WS2 excitons, achieving ultrastrong exciton-plasmon coupling.
- Tingting Wu
- , Chongwu Wang
- & Yu Luo
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Article
| Open AccessUltrafast photoluminescence and multiscale light amplification in nanoplasmonic cavity glass
This article presents a unique nanocomposite plasmonic-excitonic glass with extraordinary amplified optical properties: ultra-narrow photoluminescence (FWHM = 13 nm) and ultrashort photoluminescence lifetime (90 ps) at room temperature
- Piotr Piotrowski
- , Marta Buza
- & Dorota A. Pawlak
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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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| 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 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 AccessNonlinear optical diode effect in a magnetic Weyl semimetal
Here the authors demonstrate a broadband nonlinear optical diode effect and its electric control in the magnetic Weyl semimetal CeAlSi. Their findings advance ongoing research to identify novel optical phenomena in topological materials.
- Christian Tzschaschel
- , Jian-Xiang Qiu
- & Su-Yang Xu
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| Open AccessLaMg6Ga6S16: a chemical stable divalent lanthanide chalcogenide
Synthesising chemically stable divalent lanthanide compounds is still faced by great challenges. Here, by using octahedra coupling tetrahedra single/double chains to construct an octahedral crystal field, authors synthesised a stable crystalline La(II)-chalcogenide, LaMg6Ga6S16.
- Yujie Zhang
- , Jiale Chen
- & Hongwei Yu
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| 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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| 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 AccessObservation of naturally canalized phonon polaritons in LiV2O5 thin layers
Canalized polaritons are light-matter excitations characterized by intrinsic collimation of electromagnetic energy along a specific crystal axis. Here, the authors report the observation of intrinsically canalized phonon polaritons in a single thin layer of a van der Waals crystal, LiV2O5.
- Ana I. F. Tresguerres-Mata
- , Christian Lanza
- & Pablo Alonso-González
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| 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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Article
| Open AccessDefect-induced helicity dependent terahertz emission in Dirac semimetal PtTe2 thin films
Defect engineering of topological materials provides an avenue for the controllable manipulation of optoelectronic properties. Here, the authors introduce a defect gradient into a Dirac semimetal to control the Berry curvature dipole-driven THz emission in the material.
- Zhongqiang Chen
- , Hongsong Qiu
- & Xuefeng 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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Article
| 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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| Open AccessCapturing ion trapping and detrapping dynamics in electrochromic thin films
Ion trapping has been found to be responsible for the performance degradation in electrochromic oxide thin films. This paper visualizes ion trapping and detrapping dynamics, and provides a general picture of electrochromism in amorphous WO3.
- Renfu Zhang
- , Qinqi Zhou
- & Rui-Tao Wen
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| 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 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 AccessOrbitronics: light-induced orbital currents in Ni studied by terahertz emission experiments
Several recent works have highlighted the importance of the orbital currents in transferring angular momentum within materials. In combination with spin-orbit coupling, such orbital currents can be used to alter the magnetization of a material. Herein, the authors demonstrate the inverse effect, showing orbital current driven terahertz emission in Nickel based heterostructures.
- Yong Xu
- , Fan Zhang
- & Weisheng Zhao
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Article
| Open AccessColor construction of multi-colored carbon fibers using glucose
Color construction of black carbon fibers is a challenge due to their stable physicochemical properties. Here, the authors demonstrate the tunable structural color of carbon fibers endowed by the dynamic growth of carbon spheres using glucose.
- Sijie Zhou
- , Chunhua Zhang
- & Weilin Xu
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| Open AccessBoosting exciton mobility approaching Mott-Ioffe-Regel limit in Ruddlesden−Popper perovskites by anchoring the organic cation
Exciton transport in 2D Ruddlesden−Popper perovskite plays a key role for their optoelectronic performance. Here, authors significantly enhance free exciton mobilities in exfoliated thin flakes by anchoring butyl ammonium cation with polymethyl methacrylate, which also improves lattice rigidity.
- Yiyang Gong
- , Shuai Yue
- & Xinfeng Liu
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Article
| Open AccessAll-in-one, all-optical logic gates using liquid metal plasmon nonlinearity
Multifunctional all-optical logic gate (AOLG) with broadband-based massively parallel processing is desirable for high-speed optical processor. Here, authors propose a reconfigurable all-in-one ultra-broadband AOLG with experimentally achieving 9 fundamental Boolean logics in a single configuration.
- Jinlong Xu
- , Chi Zhang
- & Lin Zhou
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Article
| Open AccessAnomalously bright single-molecule upconversion electroluminescence
The efficiency of upconversion electroluminescence remains very low for single-molecule emitters. Here, the authors report over one order of magnitude improvement in the emission efficiency via engineering energy-level alignments for triplet relayed upconversion involving only carrier injection.
- Yang Luo
- , Fan-Fang Kong
- & Zhen-Chao Dong
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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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| 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 AccessTunable templating of photonic microparticles via liquid crystal order-guided adsorption of amphiphilic polymers in emulsions
The role of polymers in stabilizing liquid crystal (LC)-water interfaces is well studied but how the LC affects stabilizers is not fully explored yet. Here, Ma et al. show that amphiphilic polymers change their behavior when the LC is heated towards its transition to the isotropic state, and propose that this is due to an entropic repulsion active at low temperatures where the orientationally ordered LC restricts the mobility of the flexible polymer chains.
- Xu Ma
- , Yucen Han
- & Jan P. F. Lagerwall
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Article
| Open AccessGiant electric field-induced second harmonic generation in polar skyrmions
Electric modulation of second harmonic generation finds applications in integrated photonics. Here, authors introduce electric field-induced second harmonic generation by polar skyrmions in PbTiO3/SrTiO3 superlattices with giant modulation depth.
- Sixu Wang
- , Wei Li
- & Qian Li
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Article
| Open AccessDual-color emissive OLED with orthogonal polarization modes
The authors present a switchable dual colour orthogonal linear polarized OLED by internally integrating a nanograting for selective diffraction of optical modes, which is appealing for applications including polarisation-encrypted colourful optical images and autostereoscopic naked-eye 3D displays.
- Ruixiang Chen
- , Ningning Liang
- & Tianrui Zhai
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Article
| Open AccessVisualizing the interfacial-layer-based epitaxial growth process toward organic core-shell architectures
Organic heterostructures with controlled geometry on the micro and nanoscale are important in nanotechnology, but epitaxial growth processes with high lattice mismatching are challenging to achieve. Here, the authors report a visualisation process for morphology evolution on epitaxial growth.
- Ming-Peng Zhuo
- , Xiao Wei
- & Liang-Sheng Liao
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Article
| Open AccessRapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization
Phosphor-glass composites can serve as efficient and stable photonic converters, but their synthesis generally requires harsh and time-consuming procedures. Here, the authors report an alternative synthesis route that requires only a few seconds and is based on particle self-stabilization.
- Yongsheng Sun
- , Yuzhen Wang
- & Zhiguo Xia
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Article
| Open AccessSlow light topological photonics with counter-propagating waves and its active control on a chip
Topological slow light is of fundamental importance for science and technology. Here the authors reveal that the presence of magnetic phase vortices along with glide symmetric interfaces is crucial for the existence of slow light modes in topological valley photonic crystal waveguide.
- Abhishek Kumar
- , Yi Ji Tan
- & Ranjan Singh
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Article
| Open AccessAnisotropic carrier dynamics and laser-fabricated luminescent patterns on oriented single-crystal perovskite wafers
Based on differently-oriented MAPbBr3 single-crystal wafers, the authors revealed anisotropic carrier dynamics by using angle-resolved pump-probe technique, and the microstructural mechanism of the femtosecond laser-induced emission enhancement
- Chao Ge
- , Yachao Li
- & Yang Liu