Researchers develop innovative method to fabricate high performance lenses in monolayer two dimensional transitional metal dichalcogenide (TMDC) material using femtosecond laser. The lens provides subwavelength resolution and high efficiency, enabling diffraction-limited imaging.
A team of scientists has developed a novel 2D MFOR-PAM system utilizing a 2D microlens array and an acoustic ergodic relay to detect PA signals in parallel. This system can shorten scanning time by at least 400 times compared to conventional OR-PAM systems, while maintaining a simple and economic setup.
Researchers have observed a significant increase in the photothermoelectric effect in silicon nanoribbons, benefiting from optimization processes and multiphysics modeling. This breakthrough has potential applications for improving photoelectric conversion efficiency by harnessing hot carrier energy.
A team of scientists introduces a 'meta-grid' of nanoparticles that significantly enhances the light output of LEDs while reducing energy consumption. By reducing Fresnel reflection loss, the 'meta-grid' increases the lifetime of LED chips by eliminating unwanted heat.
Scientists have experimentally realized amorphous photonic topological insulators, which exhibit robust topological edge states despite lack of periodic atomic lattices. The discovery opens up new avenues for realizing non-periodic photonic topological materials for novel photonic devices.
Researchers have made significant breakthroughs in three-dimensional photonic topological phases, enabling the realization of lossless waveguides and robust control of electromagnetic waves. The advancements in topological photonics are set to diversify into nonlinearity, non-Hermiticity, and higher-dimensions.
A team of Greek researchers evaluate the progress in optical memory domain over past 25 years, shedding light on physical mechanisms behind demonstrated devices and classifying performance metrics. They highlight benefits of different optical technologies and report recent achievements towards advancing memory functionalities.
Researchers created a photonic Floquet topological insulator in a periodically driven fractal lattice, exhibiting topological edge states with real-space Chern number 1. The simulations show wavepackets can propagate along the outer and inner edges without penetration or backscattering.
Researchers created nanophotonic cavities in a nanopatterned InGaAsP membrane, exhibiting photonic analogue of valley-Hall effect. The structure supports quantized spectrum of modes confined to the domain wall, enabling topologically controlled ultrathin light sources.
Scientists propose a concept of temporal metamaterials that change permittivity tensor in time, demonstrating forward and backward waves with preserved wave vector and frequency changes. This enables real-time beam steering of electromagnetic energy, opening new possibilities for integrated photonic systems.
Researchers propose a new method for constructing higher-order topological insulators using ring resonators and synthetic dimensions, enabling dynamic control over system parameters. This approach allows for the creation of high-dimensional topological insulators with exotic properties.
A new method detects MIR images using Si cameras through non-degenerate two-photon absorption, enabling simple and efficient imaging. The approach avoids alignment artifacts and utilizes the nonlinear optical properties of the Si chip itself to trigger photo-induced charge carriers.
Researchers propose an all-optical method to modulate plasmonic response in graphene and metal-based systems using intense pump beams, enabling ultrafast light modulation. The technique exploits nanoscale photothermal effects to heat electrons, inducing changes in conductivity and optical properties.
A team of scientists has proposed an efficient full-path calculation method for optical diffraction, leveraging the mathematical similarities between scalar and vector diffraction. The method uses the Bluestein approach to reduce computation time to sub-second levels, with superior flexibility in choosing ROIs and sampling numbers.
A new type of electrochromic display has been developed using zinc-based materials, enabling transparent multicolour switching. The display exhibits reversible colour changes and maintains a semitransparent state with a colour overlay effect that broadens the colour palette.
A new AI-powered holographic imaging system detects bacteria growth in water samples with high sensitivity and speed, saving over 12 hours compared to traditional methods. The platform can classify three types of bacteria, including E. coli, within 9 hours.
Researchers analyzed display technologies, including Mini-LED, Micro-LED, and OLED. They found that mLED/μLED/OLED emissive displays outperform LCDs in dynamic range, motion picture response time, color gamut, and adaptability to flexible and transparent displays.
Researchers found emission from laterally coupled quantum dots is strongly polarized along the coupling direction and can be shaped by changing excitation polarization. This control enables optically-controlled anisotropic wavefunctions, opening new avenues for data storage and thermoelectric energy harvesting.
Researchers propose a novel vdW heterostructure for MIR light-emission applications using BP and TMDC materials. The BP-WSe2 heterostructure shows a type-I band alignment, enhancing MIR photoluminescence by ~200%. In contrast, the BP-MoS2 heterostructure forms a type-II band alignment, enabling efficient MIR electroluminescence.
Researchers propose orbital engineering to overcome efficiency limitations in high-Al-content AlGaN quantum wells. By inclining the quantum well plane, they modify energy variations induced by orbital coupling, enhancing quantum confinement and radiative transition rates.
Researchers developed a technique to modify defect populations in perovskite crystals without chemical additives, enabling the material to act as a memristor device with multiple resistance states. The voltage regulation engineering helps improve optical and electrical properties by passivating deep-level donor-like defects.
Researchers developed an on-chip plasmonic spin-Hall nanograting to detect both phase and polarization singularities of incident beams. The structure directionally couples different positions depending on the polarization and topological charge of the beam, enabling rapid detection with high resolution.
Researchers developed a graphene-based ultrathin lens that can be electrically tuned to adjust focusing and eliminate chromatic aberration. The device features high transmittance, high resolution, and multifunctional capabilities for various display applications.
A team of scientists demonstrates a low-threshold topological nanolaser in a 2D topological photonic crystal nanocavity, achieving high performance comparable to conventional semiconductor lasers. The design features a second-order corner state that provides robustness against defects and enhances light-matter interaction.
A team of scientists has developed a new parametric oscillator in the optoelectronic domain with unique phase-controlled operation, enabling stable and tuneable multimode oscillation. This allows for applications in microwave signal generation, oscillator-based computation, and radio-frequency phase-stable transfer.
Scientists create magneto-plasmonic nanoantennas with hybrid high-order multi-polar dark modes, enabling unprecedented control of light polarization. The resulting amplification enhances the magneto-optical activity, overcoming previous limitations and opening new avenues for nanophotonic applications.
Scientists have explored kirigami and origami techniques for creating unprecedented 3D micro-/nanogeometries. These new methodologies enable continuous 2D-to-3D transformations through folding, bending, and twisting, offering an extra degree of freedom in fabricating unique structures.
Scientists successfully created large-area periodic micro/nanoripple structures on a silicon substrate using femtosecond laser plasmonic lithography, retaining the properties of the graphene material. The process enables enhanced light absorption and photoelectric performance.
Researchers from China established a general strategy to guide design of optical metasurfaces with fully controlled angular dispersions. They demonstrated the importance of near-field couplings and radiation patterns in determining these dispersions.
Researchers from Tsinghua University and MIT developed a thin lensless camera free of noise using Fresnel zone plate and compressive sensing algorithm. The FZA imaging system can capture high-quality images with single-shot 'hologram' without calibration, driving down the cost of camera production.
A new study simulates electron dynamics during femtosecond laser ablation of MoS2, revealing two types of ablation mechanisms and distinct electron dynamics. The results show that higher fluence induces superheated liquid formation, leading to dramatic changes in reflectivity and micro-honeycomb structures.
Researchers developed plasmonic metasurfaces that can be tuned with polarization light, providing efficient saturable absorption for ultrafast lasers. The metasurfaces achieved stable self-starting ultrashort laser pulse generation with a modulation depth of up to 60%, outperforming previous studies.
A diffractive neural network, implemented by a compound Huygens' metasurface, realizes all seven basic optical logic operations in a compact system using a plane wave as input signal. The design strategy features flexible modification and eliminates the need for precise control of input light.
Researchers design an experiment to demonstrate chirality-dependent optical lateral force on microparticles, achieving robust bidirectional sorting and reversible optical lateral forces. The study opens new avenues for direct detection and sorting of microparticles with imperceptible chemical differences.
Scientists have developed a new scheme to generate near-single-cycle mid-infrared pulses in plasmas, achieving conversion efficiencies of up to 30%. The method uses two terawatt-level short-pulse lasers incident into an underdense plasma channel, producing a tunable mid-infrared pulse with millijoules of energy.
Researchers proposed a new scheme to generate near-single-cycle mid-infrared light pulses with a few millijoules in energy, achieving a high conversion efficiency of 30%. The method utilizes two terawatt-level short-pulse lasers and an underdense plasma channel.
Researchers have developed a visible-wavelength passively mode-locked all-fibre laser, generating picosecond pulses at 635 nm. The laser has a tunable duration and a narrow spectral bandwidth, opening up new possibilities for applications in optical communications, biomedicine, material processing, and scientific research.
Scientists discovered a new phenomenon allowing for three-dimensional RI modification in transparent materials, enabling the fabrication of compact photonic devices. The technology has potential to significantly miniaturize 3D photonics circuits, increasing optical quantum computer capacity.
Researchers have developed a new technique that uses 3D-printed aspherical microlenses to overcome the limitations of traditional microscope objectives. This allows for ultra-long-working-distance spectroscopy, enabling researchers to study single nanometre-sized light emitters without the need for bulky microscopes.
Scientists have developed an all-fiber optical wavelength converter using few-layer gallium selenide (GaSe) nanoflakes, enhancing efficiency by over four orders of magnitude compared to traditional microfibers. The converter can operate in a wide wavelength range, covering C, L telecom bands and the O band, with minimal power consumption.
Scientists developed an OLED with bright 1.5 μm electroluminescence due to enhanced Er emission through compositing an organic phosphorescent iridium complex with a separated organic erbium complex molecule.
Scientists developed a new method to increase PL quantum yield of perovskites from 2.5% to 71.54% by adding water, maintaining luminescence in various solvents and exhibiting excellent ambient and thermal stability.
Scientists create a concept based on periodic phase transformation to compensate for phase mismatching in nonlinear crystals, enabling efficient conversion of ultraviolet to deep-ultraviolet wavelengths. The approach may revolutionize nonlinear and linear modulation in photonics.
New OIHP/BHJ photodetectors offer ultra-fast response times of just 5.6 nanoseconds and a high external quantum efficiency of ~54% in the NIR region. They also achieve large linear dynamic range and room temperature stability, enabling high-quality imaging applications.
Researchers from China and Australia introduce the O-FIB technique, enabling high-resolution nano-writing in solid materials. The method uses far-field-induced near-field breakdown for direct nanowriting, achieving resolutions as low as sub-20 nm.
Researchers discovered a new mechanism of optical gain in two-dimensional materials that requires only extremely low input power. This breakthrough has significant implications for the development of energy-efficient photonic devices, potentially reducing the need for high electrical power.
Scientists demonstrate multi-nanosecond lasing at room temperature using novel direct-indirect semiconductor heterostructures. The novel material structure and high-quality cavity contribute to a low lasing threshold of just 6uJ/cm^2.
Scientists developed a new method to investigate plasmonic activity during tip-enhanced Raman spectroscopy. This enables real-time optimization of experimental conditions, improving the usability of TERS for biological samples.
Researchers have created a 3D phononic crystal that hosts symmetry-enforced Dirac points at the Brillouin zone corners. These points exhibit conical dispersion and vanishing density of states around them, making the material an ideal platform for simulating relativistic Dirac physics.
The Learning to Synthesize (LS-DNN) approach splits input signals into low and high spatial frequency bands, enabling deep neural networks to process and synthesize them. The algorithm is robust in handling noisy intensity signals, making it suitable for applications like x-rays and sonograms.