A new MIR all-optical modulator based on an acetylene-filled hollow-core fiber has been developed, enabling gas sensing and medical diagnostics in the mid-infrared range. The device utilizes the photo-thermal effect to achieve phase modulation, allowing for ultra-broadband modulation devices from NIR to MIR.
Scientists have developed a novel fabrication method for large-area and high-precision aspheric micro-lens arrays via single beam exposure DLWL, enabling high flexibility in design. The approach produces AMLA with dimensions of 30 × 30 mm² within 8 hours, exceeding 100 mm²/h writing speed.
A team of scientists has developed a novel method to demonstrate a high-purity longitudinal femtosecond laser field, enabling the creation of 10nm features in sapphire with unprecedented resolution. The technique uses an 800nm wavelength femtosecond laser source and spatial light modulators to produce a high-quality annular beam with r...
Scientists have developed a new composite material that exhibits excellent gamma-ray shielding performance, 10 times higher than epoxy. Crystal plane engineering plays a crucial role in regulating the electron density of MAPbI3/epoxy composites, improving their ability to absorb radiation.
Researchers developed a quantum receiver that uses adaptive learning to improve signal decoding in noisy environments. The upgraded receiver achieved record-high efficiency and robust interference visibility, with improved performance compared to conventional designs.
Researchers investigate generating and performing terahertz structured light using flat photonic elements for object inspection and recognition tasks. Flat photonic elements offer advantages in creating non-diffracting beams that preserve internal structure, enabling high-resolution imaging with minimal background signal.
Researchers developed a noncontact method to characterize Si surface properties, including surface potential and charge density. The technique uses terahertz emission spectroscopy and offers rapid, sensitive, and semiquantitative characterization of Si surfaces.
Scientists have discovered that breaking symmetries in nanophotonic materials can control thermal emission, enabling narrowband, directional, or polarized emissions. This can improve the efficiency of energy conversion and harvesting applications by exploiting the magneto-optical effect and spatiotemporal modulation.
Researchers establish a relation between angular diversity and spatial footprint using a transmission matrix framework for wide-FOV metalenses. A thickness bound is determined based on diffraction-limited focusing quality, allowing for compact systems with enhanced imaging capabilities.
Scientists have demonstrated mechanical bound states in the continuum (BICs) in an individual optomechanical microresonator, reducing energy dissipation and enhancing performance. BICs exist for a wide range of supporting structure geometries, enabling versatile applications in micro/nanoelectromechanical systems.
VEViD, a physics-based algorithm, corrects poor illumination and low contrast in images captured in low-light conditions. The algorithm improves visual quality for human perception and increases accuracy of computer vision algorithms.
Researchers discovered that topological insulators outperform graphene in generating terahertz electromagnetic waves, enabling efficient nonlinear terahertz photonics technology. The study achieved orders of magnitude improvement in output power approaching the milliwatt regime.
A team of scientists has developed optically-generated focused ultrasound (OFUS) for non-invasive brain stimulation with ultrahigh precision, surpassing the reach of traditional transcranial focused ultrasound (tFUS). OFUS uses a soft optoacoustic pad to generate an ultrasound pulse with a spatial resolution of 0.1 mm.
A team of scientists developed a new model to overcome optical measurement instruments' diffraction effects, enabling local improvement of lateral resolution and magnification enhancement. The model reliably reproduces measurement results and demonstrates the relative improvement of lateral resolution.
Researchers have developed a semi-nonlinear etchless lithium niobate waveguide that harnesses bound states in the continuum to achieve efficient second-harmonic generation. The device boasts low propagation losses and large nonlinear modal overlap, enabling high conversion efficiency.
Researchers have developed a unique anapole probe to measure photonic spin structures, enabling advancements in spin photonics. The probe can characterize topological spin properties associated with magnetic fields, opening doors for applications like data storage and metrology.
A team of scientists developed a near-infrared spectropolarimeter based on an electrically-tunable liquid crystal metasurface. The system simultaneously measures polarization and spectral information using a tunable metasurface with high-quality-factor guided-mode resonances combined with a computational reconstruction algorithm.
A new common path interferometer combining Fizeau and Twyman-Green principles has been developed to measure complex precision optics with improved accuracy. The Tilted Wave Interferometer overcomes reference wave problems, enhancing flexibility and reducing measurement time.
Scientists demonstrate dynamic scalar optical hopfions, proposing a method to encode and transfer topological information. The discovery may spur interest in exploring novel methods for light-matter interaction and optical manipulation.
A team of scientists has developed a novel photonic neural network accelerator based on a non-volatile Opto-Resistive RAM Switch, achieving programmable nonlinear activation functions. The accelerator demonstrates superior performance in MNIST handwritten digit recognition tasks, with accuracy rates up to 91.6%, reduced power consumpti...
Researchers propose innovative solution to identify physical items uniquely and securely. Cholesteric spherical reflectors (CSRs) are used to create 'fingerprints' on surfaces, making them detectable by robots and AR devices but invisible to humans.
Researchers have developed a method to manufacture large SiC mirrors with high accuracy, enabling the creation of the world's largest aspherical mirror. The team successfully polished a 4.03m diameter SiC mirror using a home-built MRF24 polishing machine and proposed a PVD cladding process to improve substrate surface quality.
Scientists developed a method to introduce carbonized polymer dots into quasi-2D perovskite photodetectors, improving their flexible stability without losing photo-response. The devices showed lower dark current and detectable light intensity, paving the way for high-performance flexible optoelectronic devices.
Researchers develop single metasurface to realize color-selective 3D polarization structures, offering unprecedented control over polarization with color information in 3D space. The discovery has potential applications in vector beam generation, virtual reality, and information security.
Researchers have developed bifacial monolithic all-perovskite tandem solar cells with significantly higher output power potential. The design uses transparent conductive oxide as rear electrodes, enabling the harvest of light on both sides of the device.
Researchers have demonstrated the first electrically pumped QD laser grown by molecular beam epitaxy in narrow oxide pockets patterned on CMOS compatible Si substrate. The devices show improved reliability and potentially exceed performance of previously demonstrated lasers.
Researchers uncover hidden physics in electromagnetic optical forces, introducing complex Maxwell stress tensor theorem, revealing reactive strength of orbital momentum and imaginary Lorentz force.
Researchers have created III-nitride/MoSx core-shell nanostructures with negative and positive photoresponsivity under different wavelengths, demonstrating a new universal photodetector architecture. This breakthrough enables spectrally sensitive photoelectrochemical photodetectors for various applications.
Scientists overcome barriers in conventional LED technology by creating III-nitride submicron-scale green µLEDs with a bottom-up approach. The devices feature arrays of nanowires with a core-shell multiple-quantum-well structure, which alleviate color instability and maintain peak wavelength stability despite changes in current injection.
Researchers have developed a new type of microcomb that generates dissipative solitons with flat-top spectral shape, enabling high-capacity optical communication. The new design also achieves self-starting operation, high mode efficiency, and low output power, making it suitable for real-world applications.
Scientists developed a new method using surface-enhanced Raman scattering (SERS) to monitor the effects of photodynamic therapy on tumor cells. The method, which involves Au@CDs cascade nanozymes, enables real-time monitoring of reactive oxygen species (ROS) levels in the tumor microenvironment.
Researchers developed a new technique to measure geometric phases in thermal atoms, exploiting superradiance lattices. By analyzing energy spectra and anti-crossings, they reconstructed the Zak phase of energy bands.
Researchers developed an innovative technology using Lanthanide-doped EV-targeting Nanoscopic Signal-amplifiers to super-resolve single small extracellular vesicles. This enables ultra-sensitivity in the quantitative detection of tumor-secreted nanoparticles, promoting early-stage cancer diagnosis and treatment decisions.
Researchers designed an optical black hole cavity using transformation optics, eliminating radiation loss in WGM cavities. The conformal optical black hole (OBH) cavity realizes infinite radiation Q-factor and enhances field confinement, paving the way for surface field manipulation.
A new study explores the use of light radiation to disrupt viral functionalities and eliminate viruses, including HIV, influenza, and SARS-CoV-2. The researchers reviewed rapid advances in physical irradiation methods for viral inactivation, showcasing recent validation experiments toward efficient viral elimination.
Researchers have developed a quasi-3D plasmonic structure on fiber tips, enabling high-sensitivity detection of refractive index changes and physical adsorption. The device's noise-equivalent detection limit reaches 10^-7 RIU, outperforming existing sensors.
A team of scientists has developed a novel fabrication method for aspheric micro-lens arrays, enabling large-area and high-precision creation. The single beam exposure DLWL technology satisfies the high optical performance requirements.
Researchers have developed a new method for detecting ultrafast electronic processes using entangled photons, enabling high-resolution Raman spectroscopy. The technique overcomes the diffraction limit and allows for sensitive detection of molecular excitations on the femtosecond scale.
Researchers developed lanthanide-doped fluoride nanoparticles that exhibit superior photostability, low toxicity and convenient device processability. These particles also show promising applications in biomedicine and optical information encoding, enabling broadband detection in theory.
Researchers have developed an ultrahigh-efficiency and low-noise scheme of quasi-parametric chirped-pulse amplification (QPCPA), achieving 56% energy efficiency for signal conversion. This process greatly suppresses parametric superfluorescence noise, enabling high repetition-rate operation and potential peak powers over 50 PW.
Researchers develop a novel method to generate FMCWs and control their spatial propagation behaviors simultaneously using a reflection-type STCM. The proposed method reduces system complexity and cost compared to traditional FMCW signal generation methods.
The article discusses recent advances in self-assembled liquid crystal architectures for soft matter photonics, including smart displays, optical imaging, and light field modulation devices. The review highlights the potential of these materials for broadening knowledge and promoting diverse photonic applications.
Scientists have developed a new chip that can transfer different optical states to switch light flows using supersymmetry. The approach enables broadband continuous transformation of light spatial characteristics, opening up avenues for advanced photonic functionalities.
Researchers have developed a sensitive setup for detecting luminescence spectra in rare-earth doped crystals, enabling remote measurements of magnetic fields with high precision. The detection capabilities allow for accurate measurement of magnetic fields down to 17 μT and direction determination.
Rare-earth based materials are used for high-resolution brain imaging and efficient diagnosis of brain diseases through magnetic resonance imaging, computed tomography imaging, and fluorescence imaging technologies. Additionally, they can be used for targeted therapy, overcoming the blood-brain barrier.
Researchers have discovered a nonlocal effect of anion segregation in mixed halide perovskite alloys, leading to the formation of a ring-shaped structure with potential applications for direct light charging. This phenomenon may not be an adverse effect but rather a useful mechanism for energy storage.
A new approach to brain imaging has been developed that allows for the observation of brain structures and functions without removing any part of the skull. This technique, called Through-Intact-Skull (TIS) window, enables continuous cortical monitoring at high resolution and on a centimetre-scale.
Researchers developed a method to integrate plasmonic metasurfaces on optical fibre tips, enabling advanced applications like planar waveshaping and super-resolution imaging. The new metafibers provide 'all-in-fibers' optical systems for sensing, imaging, communications, and more.
Researchers have developed a method to increase precision in luminescent nanothermometers using dimensionality reduction. By automating the selection of a thermometric parameter, they achieve thermometric approaches with precision below 0.1 degrees Celsius.
The study proposes merging bound states in continuum (BICs) using higher topological charges, significantly enhancing Q factors and suppressing scattering loss. The approach enables steerable BICs with designed momentum, improving performance for direction-related applications.