A team of scientists has developed a broadband frequency-modulated comb based on advanced quantum-dot laser, generating a record 3-dB optical bandwidth of 2.2 THz. This quasi-continuous-wave FM comb does not deliver strong optical pulses, making it favorable for integrated DWDM systems.
A team of scientists has developed an optically transparent terahertz cavity to manipulate phonon vibrations in semiconducting perovskites. This design allows for on-demand adjustment of ultrafast THz field modulation, benefiting photonic integrated devices and optical communications.
The team achieves NIR-Ⅱ broadband luminescence via intervalence charge transfer in LaMgGa₁₁O₁₉, exhibiting dual-emission (NIR-I and NIR-II) with high efficiency and luminescence external efficiency of 18.9%. The luminescence shows anti-thermal quenching behavior and longer decay lifetime associated with the anomalous NIR-II emission.
Researchers developed an artificial visual device that can operate in self-powered mode, exhibiting human-eye-like adaptation behaviors. The device demonstrates broadband light-sensing image adaptation and synergetic visual adaptation, showcasing its potential for advancement in intelligent opto-sensors and machine vision systems.
A team of scientists developed a label-free SERS-Artificial intelligence method for cancer screening, achieving high accuracy and sensitivity in detecting five types of cancers. The technology identifies subtle changes in molecular vibrations that distinguish cancer from healthy samples.
Researchers achieved metropolitan quantum teleportation at a rate of 7.1 qubits per second, surpassing the classical limit and paving the way for future applications of quantum internet. The breakthrough was made possible by developing a fully running feedback system and high-performance photon detectors.
Researchers create a phase-tailored quaternary encoding format using controllable internal assembly of dissipative soliton molecules. The four regimes allow for high-speed encoding of up to 5 kHz, with robustness and antijamming capabilities.
Researchers have developed a general methodology to measure light-to-heat conversion efficiency (LHCE) of solid materials. The PEE method simulates laser heating with electric heating and accurately calculates LHCE for various organic and inorganic materials, offering a robust alternative to existing colloidal solutions-based methods.
Researchers developed a new method for fabricating nanoscale photonic crystals with ultrafast lasers, allowing for precise control over structure dimensions and gaps. The technique enables the creation of three-dimensional complex spatial structures, opening possibilities for applications in optical communication and light manipulation.
Researchers design a silent state enhanced on-chip infrared circular polarization detector with an ultrahigh circular polarization discrimination ability. The device sets an optoelectronic silent state, suppressing noise and allowing for high sensitivity to light ellipticity change.
Scientists have developed a method to enhance valley coherence in monolayer MoS2 by encapsulating it with graphene. This structure achieved ~100% degree of linear polarization, indicating a valley coherence time at least 10-fold longer than previous reports.
Researchers have developed an intelligent metasurface design using forward and reverse algorithms, reducing computational time and improving physical accuracy. Machine learning and physics-informed neural networks are used to optimize metasurface properties and overcome limitations of traditional methods.
Researchers develop isothermal-FLUCS, a technique that controls intracellular flows while minimizing heating impact. The new method achieves thermoviscous flows with magnitudes exceeding natural streaming in Caenorhabditis elegans zygotes.
Researchers optimize linewidth narrowing in self-injection-locked on-chip lasers by integrating III-V QW or QD distributed feedback lasers with SiN microring resonators. The study achieves drastic reductions in lasing linewidth to the Hz-level using Rayleigh backscattering.
A new hybrid Distributed Fiber-Optic Sensing (DFOS) system simultaneously measures temperature, strain, and vibration along a single fiber. The system integrates Rayleigh Brillouin and Raman scattering schemes to reduce complexity and increase accuracy.
Researchers outline key challenges and development prospects for perovskite light-emitting diodes (PeLEDs) in commercial display applications. Large-area PeLEDs, patterning strategies, and flexible devices are crucial for achieving scalable manufacturing lines and high-resolution displays.
A team of scientists has developed a novel underwater geolocation technique inspired by migratory animals' navigation methods. They trained a deep neural network to predict geolocation from underwater angle of polarization images collected with an omnidirectional lens, achieving superior accuracy in low-visibility waters and at night.
Researchers have demonstrated a new approach to photonic packaging using 3D-printed FaMLs, which can be printed with high accuracy to connect optical components. This method relaxes alignment tolerances and enables passive assembly techniques, opening an attractive path towards scalable and flexible photonic system assembly.
The proposed pointwise optimization approach combines global search and accurate calibration to improve the OPA's performance in beam steering, focusing, and energy efficiency. It achieves rapid and precise phase calibration with a 53.5% increase in convergence rate and a 9.7% decrease in time consumption compared to traditional algori...
Researchers introduce a novel class of X-ray scintillators based on monodisperse copper-iodine clusters, demonstrating remarkable sensitivity and stability. The copper-iodide cluster-based microcubes exhibit excellent scintillation performance and exceptional water resistance, making them suitable for large-area flexible X-ray detectors.
Graphene materials have excellent electrical conductivity and physical, optical, thermal, and structural properties, making them suitable for sensor applications. Laser-scribed graphene (LSG) has been developed as a promising method for fabricating high-quality graphene with low energy consumption and environmental friendliness.
Researchers have discovered new lanthanide complexes that can be used as emitters in single-emitting-layer WOLEDs. These complexes eliminate energy transfer between host materials and emitters, enabling efficient white electroluminescence with controllable doping concentrations. The findings could simplify device design and fabrication...
The team used a photonic resonator to create a multi-dimensional lattice in the synthetic frequency dimension and measured its band structure. The researchers unveiled properties related to nontrivial eigenvalue topology, which are associated with the non-Hermitian skin effect.
The researchers successfully achieve ultra-low single mode lasing threshold of 17 μW with a small size of ~2.5×2.5 μm² and precise wavelength engineering capabilities. The mini-BIC lasers offer a perspective light source for future PICs aiming at high-capacity optical communications, sensing and quantum information.
Researchers have achieved high-power optical continuous-wave waveguiding in silica micro/nanofibers, with a reported power of up to 13W, significantly higher than previous records. The MNF remained optically transmissive and showed no significant degradation even at elevated powers.
A new microscopy technique combines confocal Raman and Brillouin spectroscopy to analyze multiple dimensions of tissue, including morphology, chemical properties, and mechanical properties. The developed microscope has high spatial resolution and anti-scattering capability, providing clear images and accurate measurements.
Researchers designed a 2D Dirac cone photonic system with inhomogeneous effective mass, creating synthetic gauge fields that interacted with the Dirac degeneracy. This led to the formation of in-plane chiral Landau levels, which are topologically protected and robust against backscattering.
Scientists have successfully integrated monolithic semiconductor lasers onto Si-photonics chips, overcoming a longstanding challenge. The approach uses III-V material deposition on a Si-PIC design, achieving high coupling efficiency into passive photonic devices.
Researchers created an enhanced VCD sensing platform using chiral metamaterials to improve detection of chiral molecules in mixtures. The technology achieved a 6-magnitude enhancement and demonstrated high selectivity for protein secondary structures.
A team of researchers demonstrated a 1 Terabit per second line-rate over a wireless distance of 53.42 km using advanced optical modulation formats. Adaptive optics mitigation technique improved received optical power, enabling high data-rates despite atmospheric turbulence.
Researchers have developed a novel electrically pumped edge-emitting laser chip with unprecedented performance, achieving single-mode output power levels of 400 mW at room temperature. The device uses PT-symmetry to suppress higher-order modes, maintaining beam quality comparable to narrow waveguide devices.
Researchers developed an electrically-pumped compact topological bulk laser for single-mode emission and cylindrical vector beams. The device utilizes band-inverted topological band edges that support high quality factors, enabling miniaturization and single-mode laser emission.
Researchers developed chemiluminescent carbon nanodots (CDs) that exhibit excellent in-vivo imaging quality and bacteriostatic rate against various bacteria. The CDs can be used as activatable imaging agents for inflammation-related ROS detection and have potential applications as nanomedicine for antibacterial treatments.
A new technique, FBS-IDT, enables high-resolution imaging of intracellular tau aggregates in their native environments. It demonstrates potential correlations between tau fibrils and lipid accumulation, offering a cost-effective solution for neurodegeneration research.
Scientists develop a new technique for in-plane anisotropic excitation and propagation of hyperbolic polaritons, breaking mirror symmetry without low crystalline symmetry. This enables dynamic control over light guiding and propagation on the nanoscale.
Researchers have developed a novel technique to reduce rigid tip length in endoscopes using flat meta-optics. The new design enables full-color imaging with a wide field of view, long depth of field, and short rigid tip length, opening up new possibilities for minimally invasive operations and experimental surgeries.
A team of scientists has developed soft, bi-directional neural interfaces using non-conventional polymers to transmit infrared light, allowing for simultaneous stimulation and recording of brain activity. The developed implants show minimal tissue inflammation and can be used in chronic experiments to study brain circuitry.
Researchers developed a machine learning technique called APT that significantly reduces data acquisition and computation time for imaging integrated circuits. This enables detailed images to be captured in just a few minutes, compared to hours or days using traditional methods.
Researchers utilized terahertz emission spectroscopy to explore properties and dynamics of quantum materials, such as superconductors and magnets, as well as graphene and metal nanostructures. The method revealed hidden material behaviors, enabling the discovery of exotic properties and phenomena in emerging materials.
The team created a new technique using Compton scattering to generate high-resolution images of biological structures at very low X-ray doses. This method allows imaging to be performed at less than 1% of the X-ray damage threshold of the specimen, enabling images with a resolution of 70 nanometres.
Spatiotemporal vortices of light feature azimuthal phase dependence and are associated with optical OAM. Researchers have made significant progress in understanding and controlling these phenomena for various applications.
Researchers have developed an unsupervised learning-based optical fiber imaging system that can recover high-fidelity images from degraded or scrambled speckle patterns without paired labeling. The system, named Restore-CycleGAN-GALOF, achieves nearly artifact-free and robust full-color image transport through a meter-long optical fibe...
Researchers discovered nonlocal effects in large semiconductor nanocrystals, reducing Auger recombination rate exponentially, achieving high biexciton efficiency of up to 80% in CsPbBr3 nanocrystals. This discovery provides a guideline for fabricating advanced quantum emitters.
Researchers developed apochromatic X-ray lenses with sub-micrometer accuracy, achieving focus over an X-ray energy range from 7 to 12 keV. The technology holds promise for laboratory and accelerator-based applications in materials science, energy sciences, and biology.
Researchers have developed a single sensing-storage-processing node using solution-processable MoS2-based metal–oxide–semiconductor devices, mimicking the human visual system. The device can optically sense, store, and process data, improving response time, area, and energy efficiency.
Researchers from Zhejiang University have developed a compact spectrometer that integrates multiple taper tips for hyperspectral imaging. The spectrometer utilizes complex leaky modes speckles projected from a curved microfiber taper tip to uniquely determine the wavelength of the input signal.
A team of researchers has proposed a new method for dispersion control using a single metasurface device, enabling an ultra-thin spectrometer with nanometer resolution. The device uses gold nanorods with spatially variant orientations to accurately map wavelengths to different positions on the focal plane.
A team of scientists has proposed a dispersive Jones matrix method for independent phase manipulations on any desired orthogonal polarization channels at predefined discrete wavelengths. This enables the generation of achromatically focusing spots over three pairs of arbitrarily chosen orthogonal polarizations on spatially separated ch...
Researchers have made a significant breakthrough in wave chaos research, unveiling a new platform for studying dynamical localization transitions in periodic cavity arrays. The study explores the wave chaos of deformed optical microcavities coupled to crystalline momentum, revealing potential implications for quantum information and co...
A diffractive optical network-based multispectral imager offers virtual spectral filter arrays, preserving spatial information and yielding an image cube without reconstruction algorithms. The system achieves ~79% average transmission efficiency across distinct bands.