Articles tagged with Optoelectronics
Researchers developed a novel approach to monitor perovskite ageing in real-time using terahertz time-domain spectroscopy. This technique allows for the detection of material degradation at specific frequencies, providing an indicator of the ageing degree.
Researchers fabricated dielectric metasurfaces with nanodimples and nanobumps on a flexible polymer substrate, showing controlled transmission and reflection haze across the visible spectrum. This enables increased light absorption in solar cells and LED extraction.
CLIPP monitors optical power by detecting conductance variation caused by surface state absorption, enabling non-invasive on-chip monitoring of large-scale photonic integrated circuits. The technology has been applied to identification and feedback control of optical signals, offering improved stability and performance.
The team discovered that the exciton-binding energy of solid materials is affected by how their molecules stack together, known as aggregation. By manipulating molecular aggregation, they found a way to decrease the exciton-binding energy and improve device performance.
An international team successfully realizes periodic oscillations and transportation for optical pulses using a synthetic temporal lattice. They observe the features of SBO collapse, including vanishing oscillation amplitude and flip of initial oscillation direction.
Researchers developed all-optical routers that guide light based on its wavelength and polarization, achieving efficient optical signal control. These compact devices can handle six types of input light, enhancing information processing capability.
Researchers have successfully transformed existing optoelectronic devices, including LEDs, into spintronics devices by injecting spin-aligned electrons without ferromagnets or magnetic fields. The breakthrough uses a chiral spin filter made from hybrid organic-inorganic halide perovskite material, overcoming a major barrier to commerci...
Researchers developed a new rubber-like optical fiber for UV detection using poly(dimethylsiloxane) doped with an organic dye that acts as a molecular switch. The material can be reused multiple times and is expected to integrate smart textiles and wearable devices for continuous UV dose monitoring.
Silicon photonics enables frequency-entangled qubits, allowing secure quantum information distribution across a five-user quantum network. The breakthrough promotes advancements in quantum computing and ultra-secure communications networks.
Researchers propose using ultrashort laser pulses to generate terahertz radiation by accelerating electrons and stopping them in a dielectric layer. The proposal aims to increase the efficiency of photo emissive coatings to scale up such sources.
A new compact scheme for coherent beam combining is developed to deliver high average power femtosecond lasers at 2.0 μm, overcoming the limitations of previous systems. The scheme achieves an efficiency of ~81% and generates pulses with peak powers up to 4 MW.
A team at NICT set a new world record for data-rate transmission in a standard optical fiber, reaching 402 Tb/s and increasing the aggregate bandwidth to 37.6 THz. The demonstration used novel technologies to access new wavelength regions, enabling future optical communication infrastructure to meet growing demands.
Researchers at Osaka University have developed systematically designed molecules that absorb near-infrared light but not visible light, paving the way for new applications in electronics. The new compounds show promise in areas such as solar cells, transistors, chemotherapy, and photodetectors.
Scientists have demonstrated spontaneous parametric down-conversion in a liquid crystal, creating entangled photon pairs with high efficiency. The discovery enables flexible and electric-field-tunable quantum light sources.
Researchers developed a chip-scale erbium-doped waveguide laser that approaches fiber-based laser performance, featuring wide wavelength tunability and stable output. The breakthrough enables low-cost, portable systems for various applications including telecommunications, medical diagnostics, and consumer electronics.
Researchers at the University of Michigan have developed a new thermophotovoltaic cell that can recover significantly more energy from heat batteries, increasing efficiency to 44%. The device uses air bridges to trap photons with the right energies, allowing for the recycling of useless photons and improving overall performance.
A breakthrough innovation introduces a multifunctional three-terminal diode, revolutionizing optoelectronic integrated chip technology. The integration of traditional photodiodes with a metal-oxide-semiconductor structure enables effective control over carrier transport during light emission or detection processes.
Researchers at UESTC China developed a graphene-sensitized microresonator for ultra-sensitive gas detection, achieving detect limits of 1.2 ppb for H2S and 1.4 ppb for SO2. This technology has promising applications in biochemical sensing and photonic-microwave signal generation.
Researchers have developed an efficient single pixel imaging scheme using a compact fiber laser array and untrained deep neural network. The system enables rapid speckle projection and reconstructs high-quality images, making it suitable for remote sensing and target detection applications.
A new method is introduced to study topological photonic phase in real space using information entropy, enabling the identification of topological states without relying on band structures. This approach provides a novel way to analyze physical properties of topological systems.
A new, low-cost, high-efficiency photonic integrated circuit has been developed using lithium tantalate technology. The breakthrough platform offers scalable and cost-effective manufacturing of advanced electro-optical PICs, paving the way for volume manufacturing.
Scientists designed a chip that can control the terahertz band, enabling high-speed data transmission of up to 12 Gbps. The device utilizes synthetic topological phase transitions to manipulate channel functions.
Researchers at Universität Leipzig have found a way to drive electric currents with light even when the material has minimal absorption. This breakthrough reveals the properties of 'Floquet Fermi liquid' states, which can display spectacular properties like superconductivity.
A team of researchers at NYU Abu Dhabi's Photonics Research Lab has developed a novel, two-dimensional material capable of precise light modulation. The innovation offers precise control over the refractive index while minimizing optical losses, enhancing modulation efficiency and reducing footprint.
A new defect-ordered layered halide perovskite was discovered, shedding light on how order can emerge through defects in hybrid organic–inorganic compounds. The compound's optical bandgap increased with the concentration of ordered defects in the lattice, presenting a new strategy for tuning perovskite properties.
A team of researchers has successfully integrated a metasurface with photonic integrated circuits, enabling fast and tunable control over light manipulation. The device can shape any wavefront in reconfigurable arbitrary polarization states at speeds of up to 1.4 gigahertz.
Scientists developed Te-based THz modulators with improved modulation depth and speed, overcoming the tradeoff between the two. The stacking order of materials significantly impacts the modulation property, which can be regulated through substrate engineering.
Researchers from USTC develop a new mechanism to improve efficiency of single-molecule upconversion luminescence by fine-tuning energy-level alignment. The study reveals efficient excitation mechanisms and visualizes prerequisites for achieving high efficiency in single-molecule systems.
Researchers have developed two innovative methods for mass-producing metalenses, reducing production costs by up to 1,000 times. The team achieved successful creation of large-scale infrared metalenses with high resolution and exceptional light-collecting capabilities.
This study proposes a non-Euclidean configuration based on Möbius rings to control topological photonic states via the spin-locked effect. The work enables polarization control and tuning of topological phase in non-Euclidean space.
Researchers have developed a miniaturized optical sensor that can detect glucose levels in human blood plasma with comparable sensitivity to laboratory-based sensors. The device operates wirelessly using a coin battery and has demonstrated its viability in detecting glucose levels between 50-400mg/dL.
Researchers developed a synthesis method for white LEDs in halide perovskites, achieving sufficient blue emission and improving stability. By doping metal ions into the material, they created crystals that emit white light with tunable color.
Researchers developed a single-laser direct writing method to create multiple materials, including silver and graphene, with high sensitivity and stability. The technique utilizes photo-thermal conversion to synthesize materials with desired morphologies and structures.
Researchers from Tokyo University of Science developed a flexible paper-based sensor that operates like the human brain, enabling low-power and efficient health monitoring. The device can distinguish 4-bit input optical pulses and generate currents in response to time-series optical input, with rapid response times.
Researchers developed an algorithm that combines polarization and visible images to reveal multi-dimensional features, improving target detection accuracy. The NSCT transform is used to fuse the images, compensating for limitations of single-image sensors.
A team of researchers created an optical display technology using afterglow luminescent particles, enabling writing and erasure of messages underwater. The device exhibits resistance to humidity and maintains functionality even when submerged for prolonged periods.
Scientists successfully observed and controlled quantum effects at room temperature using a novel optomechanical system. The breakthrough enables practical applications of quantum technologies and expands the study of macroscopic quantum mechanics.
Researchers developed a high-speed modulation system combining digital display with super-resolution imaging, significantly improving lateral and axial resolution. This enables detailed study of subcellular structures in animal cells and plant ultrastructures, paving the way for future biological discoveries.
Researchers developed highly efficient and stable perovskite light-emitting diodes using a solvent sieve method, achieving an operating lifetime of over 5.7 years and a record high external quantum efficiency of 29.5%. The study also demonstrated excellent stability in ambient air conditions.
A team of researchers has identified the intrinsic interactions responsible for light-induced ferroelectricity in SrTiO3. By measuring fluctuations in atomic positions, they found that mid-infrared excitation suppresses certain lattice vibrations, leading to a more ordered dipolar structure.
Breathing dissipative soliton vanishes, replaced by dynamic behavior. Researchers at Zhejiang Normal University observed transient breathing dynamics during the extinction process of dissipation solitons in ultrafast fiber lasers.
Researchers have successfully generated high power fiber lasers at 1.2 μm waveband using stimulated Raman scattering effect in phosphorus-doped fibers, achieving record-breaking output powers of up to 735.8 W. This breakthrough has significant implications for photodynamic therapy, biomedical diagnosis, and oxygen sensing applications.
A new numerical program improves light scattering analysis at the nanoscale by enhancing multipole decomposition calculations. The program significantly improves accuracy and efficiency using Lebedev and Gaussian quadrature methods.
Researchers developed a method to suppress deep-level traps in tin-based perovskite solar cells, leading to improved efficiency and stability. By using semicarbazide hydrochloride additives, they reduced non-radiative recombination and increased charge lifetime, achieving champion PCEs approaching 11%.
Researchers developed an ultrafast fiber laser system with a record-breaking average power output of 403 W, 0.5 mJ pulse energy, and 260 fs. The integrated electronic dispersion hardware effectively compensates for high-order dispersion, optimizing pulse width while achieving superior improvement in pulse quality.
A team of researchers from Chiba University introduces a new method of controlled deposition, enabling the creation of stable surface layers with controllable polarization. This approach is expected to improve the efficiency and lifetime of OLED materials, as well as pave the way for the development of new organic devices.
Researchers have developed a new OLED technology that uses an exciplex route to produce white lights, reducing costs and device complexity. By using a spacer layer with ambipolar properties, the technology enables a single-layer architecture for white OLEDs.
Researchers discovered a potential pathway of amyloid beta drainage via meningeal lymphatic vessels. Photostimulation was shown to reduce Aβ plaques in the brain and alleviate cognitive decline in mice with 5xFAD genetic mutations.
Researchers have successfully optimized 2D semiconductors through substitutional doping, demonstrating enhanced B-exciton emission and broad spectral response in V-doped MoS2 monolayers. This work paves the way for future optoelectronic devices with improved performance.
Researchers develop cross-shaped microstructure metamaterial for efficient broadband polarization conversion, achieving conversion efficiency of over 80% in the 1-2.32 THz range. The design also facilitates linear-to-circular polarization conversion with an ellipticity of 1 at 0.85 THz.
A new THz detection method has been developed to measure terahertz radiation directly at the plasma source as it is produced. This method uses nonlinear optics to double the frequency of an optical beam in the presence of a THz wave, providing efficient measurement and characterization of the radiation.
Researchers at Nanjing University of Information Science and Technology have developed a guest pre-intercalation strategy to enhance multivalent ion storage. KMO cathode material exhibits high reversible capacity, excellent cycle stability, and potential application in aqueous Al-ion batteries.
Researchers developed a novel method to optimize pump wavelength, reducing ESA-induced absorption and increasing pump quantum efficiency. This approach achieved higher laser output and slope efficiency compared to conventional pumping schemes.
A new scheme for realizing nonreciprocal interlayer coupling in bilayer topological systems has been developed by researchers at Peking University. The scheme is based on constructing on-site gain/loss in bilayer non-Hermitian topological systems and reveals a relation between two microscopic provenances of the non-Hermiticity.
Researchers from NICT and partners demonstrated a record-breaking data-rate of 22.9 petabits per second using a single optical fiber, more than double the previous world record. The achievement showcases the potential for ultra-large capacity optical communication networks.
The research team discovered that chloride ions cause a dramatic negative impact on blue PeLEDs' operational lifetime due to their low migration energy barrier. This issue necessitates innovative strategies to immobilize chloride ions within blue perovskite emitters.
Researchers at the University of Michigan developed a new way to move quasiparticles, which could lead to more efficient devices and room temperature quantum computers. The team used a laser to create a cloud of quasiparticles that migrated up the pyramid's edge and settled at the peak.
Researchers led by Prof. Ray-Hua Horng published a groundbreaking study on the performance of thin-film vertical-cavity surface-emitting lasers (VCSELs) on composite metal substrate, introducing innovative methods to enhance thermal management. The breakthrough technique brings substantial improvements in device characteristics and pot...
Scientists create techniques for fine-tuning surface features and hierarchies using ultrafast lasers. They demonstrate the ability to build complex structures, such as fort-like formations, by controlling in-situ deposition during laser ablation.
Researchers have successfully developed a tapered fiber-based system that can deliver high-energy ultrafast lasers with near-diffraction-limited beam quality. The system achieved pulse energies of up to 126 μJ and peak powers of 207 MW, representing the highest reported values from a monolithic fiber laser.