Scientists develop 3D volumetric optical encryption using dual-light emitting fluorescent-phosphorescent materials, concealing real info with transient phosphorescence. The technique enables secure data protection and could be used in wearable sensors and displays.
Researchers have demonstrated an achromatic diffractive liquid-crystal optics system with ultrathin formfactor and light weight, improving color performance and overcoming chromatic aberration in virtual reality displays.
A team of scientists creates a universal paradigm for achieving high-efficiency exceptional point (EP) in the visible using interlayer loss to control the interplay between lossy structure and scattering lightwaves. The bilayer framework demonstrates perfect retroreflection and absorption, with efficiencies of 88% and 85%, respectively.
A team of scientists has developed a chip-integrated metasurface-based Full-Stokes polarimetric imaging sensor inspired by the mantis shrimp eye, achieving high accuracy and large field of view. The sensor operates at visible wavelengths with ultra-compact footprint and CMOS compatibility.
Researchers developed a dielectric metasurface for amplifying upconversion emissions in lanthanide-doped UCNPs, showcasing ultrabright emission at dual bands. The polarization-controlled dual-band upconversion bursts demonstrate ultra-high degrees of polarization.
Researchers developed lithographically defined asymmetric and symmetric Mie-scatterers for subwavelength control of wave transmission and reflections. The device platform enables pre-defined chiral light propagation and backscattering-free resonances, needed for various applications such as frequency combs and photon blockade.
Researchers demonstrate high levels of Raman amplification at 2.2 μm using a highly nonlinear silicon core fiber platform, extending the reach to 4 mm and beyond via cascaded processes. The work provides a crucial step towards compact and tunable mid-infrared systems.
Researchers have experimentally observed nonlinear photonic disclination states in waveguide arrays, which can enhance nonlinear effects and enable stable lasing. These findings may lead to new ideas for developing compact optical functional devices.
Researchers have developed infrared avalanche photodiodes using bulk and 2D materials, offering improved detection efficiency and flexibility in heterostructure design. The devices exhibit exceptional capabilities such as mechanical flexibility and strong light-matter coupling.
Scientists use a new imaging technique to visualize collagen fibrils in intact human corneas, showing the main direction of lamellae changes with depth. This study enables characterizations of corneal structure and behavior, paving the way for understanding diseases like keratoconus.
A team of scientists has developed an intense four-octave-spanning ultraviolet-visible-infrared full-spectrum laser source using a cascaded architecture of gas-filled hollow-core fiber, lithium niobate crystal, and chirped periodically poled lithium niobate crystal. The system leverages the synergic action of second-order nonlinear eff...
Scientists have developed speckle diffraction tomography, which enables high-resolution images of thick biological samples with lateral resolution up to 500 nanometers. The technique offers full-field quantitative imaging capabilities, revealing nanoscale features in complex specimens.
A new AI-executable, end-to-end-automated XPCS workflow enables the study of spontaneous dynamics in complex fluids. The technique uses a spatially-coherent X-ray beam to probe dynamics at all length scales.
New plasmonic metafiber EOMs integrate devices on optical fiber facets, eliminating coupling complexity and reducing losses. The modulation speed reaches up to 1000 MHz with a bias voltage of ±9 V.
The article introduces a new design method for on-chip metalens that enables efficient optical interconnection between devices with large scaling ratios. The optimized metalens achieves high transmission efficiency, lower stray light, and improved focusing efficiency compared to traditional waveguide tapers.
Researchers developed FPI-based phase demodulation for heterodyne LITES, improving SNR and detecting gas concentrations accurately. The method reduces interference and provides linear response, long-term stability, and independent signal peak-to-peak values.
The article discusses measurement techniques for aspheric surface parameters, including general fitting and center-of-curvature-based methods. These methods assess the quality of aspheric surfaces and provide direction for processing and suitable targets for processing.
A team of researchers led by Professor Aydogan Ozcan has developed methods for designing all-optical universal linear processors of spatially incoherent light. These processors use successive diffraction of light to perform arbitrary linear transformations without external digital computing power, enabling fast and energy-efficient com...
A new platform for integrated spectrometers has been proposed using solution-processable semiconductors, enabling ultra-narrowband detection and spectral tuning. The platform exploits conjugated-BIC photonics, allowing for high spectral resolution and wide tunability.
Researchers at Xiamen University developed a topological spin light-emitting diode to manipulate the quantum state of light. The breakthrough enables the creation of large-scale, room-temperature stable chiral photon sources without external magnetic fields, paving the way for miniaturization and device integration in quantum technology.
A team of scientists has developed a technique that uses high-frequency terahertz radiation to slow down amyloid deposition in Alzheimer's disease. The research found that the radiation can modulate protein conformation and delay fibrillation, presenting a promising strategy for treating the disease.
A new multifunctional metalens has been developed to structure quantum emissions from solid-state single photon emitters. The metalens can simultaneously tailor directionality, polarization, and orbital angular momentum degrees of freedom, enabling the generation of high-dimensional single-photon hybrid quantum states.
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.