Articles tagged with Optics
This paper introduces a novel one-step vapor purification technique to achieve high-purity vapor atmospheres and reduce impurities in thermally evaporated devices. The approach successfully suppressed defect formation and improved stability in perovskite LEDs and OLEDs.
Scientists have found a way to create chiral light in free space using structured beams, enabling simpler control over spin and twist. This breakthrough could lead to new ways of encoding information in light, with potential applications in quantum communication and sensing technologies.
Researchers have introduced laser reflective tomography to overcome the speed-resolution trade-off in NLOS imaging, achieving kilometer-scale high-resolution imaging without scanning mechanisms. This innovative approach combines single-point detection with multi-angle projection data for accurate scene reconstruction.
A team of researchers has found that the energy of light used to excite spin defects in hexagonal boron nitride affects their performance, leading to a threefold boost in contrast and calculated DC magnetic field sensitivity. The study also reveals a trade-off between emission stability and signal strength.
Researchers investigated phosphate double-bond character in solid and liquid phases using oxygen K-edge X-ray absorption spectroscopy. The study found that the double-bond character increased with increasing negative charge in the solid phase, but decreased in aqueous solutions due to interactions between phosphates and Na+ ions.
A team of scientists developed a minimalist optical system for achromatic imaging based on a monolithic integrated meta-axicon cluster. The novel imaging paradigm combines natural wideband consistency and computational imaging technology to achieve large-aperture, wide field of view (FOV), broadband achromaticity, and high resolution.
Researchers developed light-transmitting hydrogel fibers to detect early breast cancer in narrow ducts. The soft fibers guide visible and near-infrared light with low optical loss, retaining optical properties over time.
Researchers developed a perovskite/In0.47Ga0.53As thin-film heterojunction to create high-sensitive DUV-SWIR photodetectors with optimal stability and performance. The device achieved 98.9% retention of initial performance after 30,000 cycles.
Researchers developed a simple oxide system with intrinsic self-recoverable mechanoluminescence without external energy input. The material exhibits strong near-infrared emission under mechanical stimulation, featuring reversible ionization and recapture process enabling consistent emission over thousands of loading cycles.
Researchers developed a laser Speckle-based Curvature Optical Metrology (SCOM) instrument to measure two-dimensional surface curvature of X-ray mirrors. The system offers a compact, flexible alternative to traditional height-based interferometric methods.
Researchers developed a novel single-active-region mid-infrared QCL architecture that achieves broad spectral coverage and high gain uniformity. The diagonal multi-state-to-continuum active region design enables strong coupling between upper lasing levels, substantially broadening the gain bandwidth of the active region.
A research team led by David Norris developed pixels that can both steer light and analyse it, allowing for the creation of camera-displays with combined functions. These so-called bidirectional pixels use surface waves to control light intensity, polarisation, and oscillation phase.
A team of researchers has reported a generalized Doppler effect that enables simultaneous capture of rotation magnitude and direction with high accuracy. The approach uses spin-orbit coupling to encode motion information into multiple degrees of freedom, resulting in substantially larger frequency shifts than conventional methods.
Researchers have created stable patterns of light called optical skyrmions using a laser and a small circular disc, generating up to four related topological field patterns simultaneously. This method offers a simpler way to generate, study and adjust optical skyrmions, which hold potential for future data storage and computing systems.
A new paper reports a record-breaking optical vortex array with 3,070 phase-coherent vortices at a peak power of 58 megawatts. The system uses a novel three-mode representation and multibeam interference geometry to achieve scalability.
Engineered NIR-II-responsive plasmonic nanozymes degrade extracellular DNA and induce hyperthermia, destabilizing biofilm integrity. Biocompatible surface functionalization ensures seamless integration with bone implants.
Researchers at Penn State developed photomemristors that adjust sensitivity based on light levels, like the human eye. These devices can process light data faster and more accurately than traditional systems in mixed lighting environments.
A nonvolatile phase-programmable spintronic terahertz emitter has been developed, allowing for ultrafast programming of terahertz wave phases. The device demonstrates reversible write-read-reset processes and spatial terahertz phase patterning with high signal-to-noise ratios.
Researchers developed a new method to observe nanoscale spin waves, directly detecting short-wavelength magnons using resonant soft X-rays. The technique, called magnon momentum microscopy (MMM), reveals strong nonlinear interactions and four-magnon scattering processes in magnetic materials.
A novel asymmetric alloying method enables the creation of carbon-centered gold(I)-silver(I) chiral bicapped square antiprism polyhedral clusters, exhibiting phosphorescence and distinct chirality-dependent properties. The approach offers a new paradigm for precise alloying and stereocontrol of metal clusters.
Researchers developed an interferometric second-harmonic generation imaging approach to identify antiparallel domains and detect hidden structural defects in hBN thin films. The study finds that SHG intensity is closely associated with differences in crystal orientation and destructive interference between domains.
A digital 'super-brain' with physics-based knowledge significantly speeds up the design and development of optical components, such as those for quantum computers and camera lenses. By integrating physical principles into machine learning algorithms, researchers reduce simulation time from months to days.
Scientists have developed a method to measure the electronic structures of liquid water and organic molecules using soft X-ray absorption spectroscopy. By controlling the thickness of the liquid layer, they obtained XAS spectra of both the bulk liquid and the solid-liquid interface.
Researchers at Colorado State University have measured a hydrogen proton's radius to be 0.84 femtometers, resolving the long-standing scientific discrepancy that has puzzled scientists for years. The finding confirms the Standard Model theory and opens a door for further study, revealing subtle issues in earlier measurements.
Scientists at The University of Osaka have successfully fabricated protein networks in living cells using a focused laser beam. The approach allows for non-invasive control over network formation and exhibits dynamic motions similar to those observed in living cells.
A novel solar-thermal desalination process produces fresh water in an energy-efficient way, eliminating brine and chemical additives. The technology leverages the 'coffee ring' effect to extract salts from seawater, producing nearly 100% of the salts in solid form.
Researchers developed a system integrating convolutional neural networks and all-optical passive diffractive decoders for super-resolution image projection. The hybrid platform achieved significant improvements in image synthesis over extended depth, reducing data requirements without additional power constraints.
A new laser-based process is set to revolutionize photonics manufacturing by removing manual calibration, which accounts for over half of production costs. The technology promises faster, cheaper, and precise manufacturing at sub-micron tolerances.
Researchers developed an all-optical artificial synapse that uses light to mimic neural learning and perform in-sensor image processing. The device shows paired-pulse facilitation and depression, allowing it to both enhance and suppress signals, a requirement for realistic neural behavior.
Researchers use a single rubidium atom trapped in an optical tweezer as a scanning probe to image fine structures of light patterns with spatial resolution surpassing the diffraction limit. The technique successfully visualizes both light intensity and polarization distributions at the nanoscale.
The SPIE Scholarship Program provides support to 85 students studying optics, photonics, or related fields with scholarships ranging from $3,000 to $11,000. The program aims to build a sustainable photonics industry through high-impact support for students and emerging leaders.
A team at Polytechnique Montréal has developed a new material that enables direct light processing on silicon chips, reducing the need for signal conversion and amplification. This breakthrough could help sustain the next wave of AI at scale by giving light a larger role in data processing.
Researchers have developed an on-chip platform using ferroelectric spherulites to generate stable, broadband optical skyrmions across the entire visible spectrum. This breakthrough merges high-capacity data transmission with topological protection, opening new avenues for classical and quantum communication technologies.
Researchers at the University of Rochester developed a solar-thermal desalination process that produces fresh water in an energy-efficient way, eliminating brine and requiring no chemical additives. The technology extracts nearly 100% of salts in solid form, producing table salt and precious minerals like lithium.
Dual-comb spectroscopy enables precise, rapid, and broadband measurements using two optical frequency combs with slightly different repetition frequencies. This technique has been implemented across the electromagnetic spectrum, from terahertz to visible range, with ongoing efforts towards ultraviolet range.
Scientists have developed a new form of covert communication called thermoradiative signatureless communication, achieved by balancing electroluminescence with negative luminescence in mid-infrared LEDs. This approach can blend into thermal background, leaving no trace for eavesdroppers and offering added security.
Researchers developed an optically programmable dual-band perovskite single-pixel detector that acts as both a detector and decryption key, successfully encrypting color images with unparalleled security. The device's unique optical programmability enables it to distinguish between hidden information in different imaging modes.
Scientists develop on-chip system generating singlet oxygen at molar-level concentrations, exceeding conventional methods by six orders of magnitude. The approach enables position- and pixel-selective cytotoxicity without additional molecular sensitizers.
Scientists have directly imaged the effect of short current pulses on skyrmions, finding that they break up into disordered patterns before re-forming in a predictable manner. This discovery opens up new possibilities for computing concepts like probabilistic computing.
A new approach enables computers and machines to capture images at higher resolution and faster speed, making it impervious to reflective surfaces. The technology uses a virtual screen created by repurposing the surroundings of specular objects.
Scientists confirm decades-long prediction by measuring the color-changing effect of light in chiral carbon nanotubes. The material converts light at a rate two to three orders of magnitude greater than conventional materials.
Researchers develop a novel adhesive based on liquid-like chalcogenide glass, enabling seamless bonding of high-index optical components and improving transmission and power delivery. The new material achieves significant enhancements in laser power delivery and durability under high-power conditions.
The TransEuroOGS project establishes a network of interoperable optical ground stations across Germany, Greece, Ireland, and Luxembourg to enable quantum-secure space-to-ground communication. The project aims to address challenges in secure transnational communication using quantum key distribution.
Researchers develop a powerful, compact solution for all-optical image processing using meta-operators that perform complex tasks like edge detection and 3D hologram reconstruction. The platform enables real-time computation without digital post-processing.
Osaka Metropolitan University researchers developed a light-driven method to rapidly collect microscopic targets, outperforming traditional techniques. The technique concentrates bacteria between 1000-10,000 times faster than existing approaches, paving the way for early disease detection and analysis of nanoparticles.
Researchers investigated the effect of laser-beam diameter on two-photon stimuli and found that accurate focusing is crucial for detection. The study revealed that beam geometry plays a key role in determining visibility thresholds, with precise alignment necessary to maximize photon density reaching the retina.
A large cohort study found a modestly increased risk of nonarteritic anterior ischemic optic neuropathy associated with GLP-1 receptor agonist use. In contrast, SGLT2 inhibitor use was not linked to an increased risk. The findings warrant heightened vigilance for GLP-1 RA users.
Researchers have developed an electrically switchable continuous phase liquid crystal Fresnel zone plate, enabling efficient focus control for augmented reality headsets, compact cameras, and adaptive optical instruments. The device achieves a 80% increase in focal intensity compared to traditional binary Fresnel lenses.
Researchers have developed a single-pulse anisotropic amorphization lithography technique to create regular sheet-like structures inside all-inorganic dielectric crystals. The method uses ultrafast laser pulses to induce controlled phase transitions, enabling high-purity amorphization and precise control over structure formation.
Researchers at the University of East Anglia have discovered that light can be programmed using its natural geometry, allowing for the creation of structured light with unique properties. This breakthrough has far-reaching implications for fields such as medicine, data transmission, and quantum technologies.
Researchers introduce generalized perfect spatiotemporal optical vortices with topological-charge-independent sizes and fully controllable geometric shapes. The new method achieves higher modulation efficiency and improved energy utilization, exceeding 90%.
A new device combines high-performance single-photon generation with multidimensional state engineering, enabling flexible control over photon properties. The integrated platform delivers record-breaking source performance and opens up opportunities for resilient quantum entanglement and high-dimensional quantum communication.