Articles tagged with Optics
Aarhus University researchers have developed a transparent layer with silver nanorings that adapts to sunlight intensity, controlling heat entry through glass without dimming the view. The thermoplasmonic effect reduces near-infrared transmission, lowering cooling demand and CO₂ emissions in energy-efficient buildings.
Researchers at TU Wien and Institut Langevin create fingerprint matrix technique to overcome problem of multiple scattering, allowing detection of objects even in dense cloud or murky water. The method has been tested on metal objects buried in sand, medical markers, and muscle fibers, with promising results.
The team developed a new method to produce ultrafast squeezed light, which can fluctuate between intensity and phase-squeezing by adjusting the position of fused silica relative to the split beam. This breakthrough could lead to more secure communication and advance fields like quantum sensing, chemistry, and biology.
Researchers create nanoscale slots to tune phonon vibrations, enabling ultrastrong coupling and hybrid quantum states in lead halide perovskite. This breakthrough could improve energy flow and performance in optoelectronics.
A new imaging method, HyFMRI, combines fluorescence and MRI to measure neuronal and astrocytic activity while mapping hemodynamic responses. This allows for direct measurement of local neural activity, crucial for functional neuroscience research.
UC Riverside-developed FROSTI system allows precise control of laser wavefronts at extreme power levels, opening a new pathway for gravitational-wave astronomy. This technology expands the universe's view by a factor of 10, potentially detecting millions of black hole and neutron star mergers with unmatched fidelity.
Researchers developed a novel method to regulate phosphorescent carbon dots by modulating the self-assembly of cyclodextrin through ultrasonic means. The resulting materials exhibit long-lived excited states, enhancing signal-to-noise ratio and tissue penetration for non-invasive imaging. Ultrasonic responsiveness is positively correla...
A new 3D imaging technique combines intensity diffraction tomography with adaptive optics to track subcellular structures over extended periods. This approach achieves high spatiotemporal resolution and molecular specificity, enabling the study of cellular dynamics.
Researchers discovered that ultrafast magnetization switching proceeds with a speed of about 2000 meters per second, not uniformly throughout the material. A moving boundary propagates through the film, sweeping through the entire layer in roughly 4.5 ps.
Scientists have developed a new plasmonic nanocavity that enhances two-photon upconversion from 2D excitons by 2440-fold. The nanostructure's resonance wavelength can be adjusted to optimize light collection and emission directionality, leading to improved efficiency in nonlinear photonic devices.
Exciton-polaritons in perovskites enable ultra-efficient photoluminescence, polariton lasing, and low-power laser applications. Perovskite semiconductors facilitate strong coupling at room temperature through simple methods, paving the way for robust and scalable photonic technologies.
Researchers developed a novel approach to visualize and quantify polluting nanoplastic particles in live intestinal organoids. The phasor-FLIM method demonstrates improved sensitivity and specificity for detecting internalized nanoparticles, allowing for accurate quantification of different types.
Researchers have demonstrated a portable, noninvasive technology that can detect metabolic changes linked to Alzheimer's disease by measuring cytochrome c oxidase activity. The study found that including oxCCO measures improved the ability of the brain-monitoring tool to capture clinically relevant brain changes.
Researchers have developed a high-performance mid-infrared imaging system without lenses, capturing clear pictures over large distances and in low light. The system uses an optical pinhole inside a nonlinear crystal to form an image, which is then converted into visible light, allowing for distortion-free and large-depth imaging.
A new system developed by Penn researchers allows light to be guided through tiny crystals with minimal scattering or reflection. This breakthrough paves the way for more efficient and controllable photonic chips, enabling faster data transmission and reduced errors.
The new Harvard device can turn purely digital electronic inputs into analog optical signals at high speeds, addressing the bottleneck of computing and data interconnects. It has the potential to enable advances in microwave photonics and emerging optical computing approaches.
AI-driven inverse lithography technology optimizes lithography modeling and mask optimization, improving resolution and overcoming computational bottlenecks. The integration of AI enables rapid synthesis of high-fidelity mask patterns, enhancing imaging quality and laying the foundation for large-scale industrial adoption.
Researchers demonstrate real-world integration of QKD and 110.8 Tbit/s classical coherent optical communication over multi-core fibers, reducing noise and achieving stable quantum key generation. This work enables scalable integration of QKD and classical communication in future multi-core fiber networks.
Researchers have sculpted photon spin into a three-dimensional toron, a knot-like structure that combines point-defect monopoles with swirling skyrmion tubes. This breakthrough enables the creation of robust optical circuits that could carry more data than current fiber links.
Researchers create topological exceptional points using on-chip all-dielectric metasurfaces, eliminating Ohmic losses and suppressing zero-order diffraction background. The platform enables precise control of topological phases and polarization decoupling for next-generation wearable AR devices and advanced optical display technologies.
A team of researchers from the University of Melbourne and Hanyang University has discovered a new method for creating spiral whirlpools of light through Van der Waals materials. This breakthrough could lead to more efficient and secure optical communication systems, including Australia's NBN.
A team of scientists has unveiled a MoS2-based phototransistor that sets new records in optical gain and sensitivity. The device detects light pulses containing tens of photons and identifies disease biomarkers at attomolar concentrations, outperforming current gold standard assays.
The research team developed an analytical model using lattice networks to understand the mechanism of twisted photonic crystals, allowing for efficient light beam control and concentration. The device has potential applications in tracking satellites, improving lasers, quantum computing, optical memories, and enhancing photocatalysis.
Researchers developed a scalable versatile integrated photonic chip to handle static and dynamic temporal tasks, achieving high efficiency in processing various neural network models like CNN, FCNN, and PGRNN. The chip leverages multi-wavelength channels and dual-input-port structures for flexible all-optical processing.
Researchers at TU Wien developed a novel microscopy method that allows for gentle imaging of sensitive biological structures and quantum particles. The new technique stores light in an optical resonator where the sample is also located, providing clearer signals than other methods.
Researchers have developed a novel label-free multiphoton photoacoustic microscope to detect endogenous NAD(P)H in brain cells, achieving remarkable imaging depths of up to 1100 μm. This technology enables real-time monitoring of metabolic dynamics in brain cells, offering new insights into neurodevelopment and disease mechanisms.
The innovative design eliminates optical path difference-induced errors, enabling simultaneous 3D measurement within a compact module. The technology boasts 0.25 nm resolution and outstanding linearity, making it a promising candidate for future semiconductor fabrication and atomic-scale production.
Researchers develop quantum correlation-enhanced dual-comb spectroscopy to detect molecular signals below quantum noise limits. The technique achieves a 2.6x increase in measurement speed and high-resolution spectra, opening new frontiers in ultrasensitive molecular detection.
Researchers found that Brillouin scattering processes in few-mode fibers are fundamentally different from single-mode regime, with higher ultrasound frequencies and lifted symmetry restrictions. This opens a new engineering playground for better laser sources and sensor systems.
Researchers have developed a novel radio-photovoltaic cell design that achieves high power output and exceptional long-term stability. The innovative WLC structure realizes a 3-fold improvement in energy conversion efficiency, making it suitable for nuclear battery applications.
Researchers propose a passive quantum compressed sensing-based single-photon dynamic imaging technique for long-distance drone detection. The method improves imaging sensitivity and robustness against noise, enabling frequency-domain sparse signal reconstruction based on discrete photon detection events.
Researchers predict and experimentally demonstrate novel intrinsic HOTIs in homogeneous photonic metamaterials, with hinge states protected by higher-dimensional topological invariant. The discovery provides deeper insights into the interplay between geometry-induced gauge fields and topological invariants.
A new method called ISM-FLUX streamlines MINFLUX by using a 5x5 SPAD array detector to capture spatiotemporal information from fluorescence photons, allowing for precise localization over larger areas without losing accuracy. This innovation enables faster and more user-friendly molecular-scale imaging in biology.
A study found no association between semaglutide treatment and diabetic retinopathy, but suggested a potential link to nonarteritic anterior ischemic optic neuropathy. Further research with larger sample sizes is needed to clarify this risk.
Researchers developed a non-mechanical bioimaging device that uses electrowetting to produce high-resolution images of the retina and cornea. The device has shown promise in detecting eye conditions like age-related macular degeneration and glaucoma, as well as heart disease.
Researchers developed an indirect photopatterning approach to create micrometer-scale RGB pixel patterns in single phase network structure, enabling high resolution full-color OLEDs with over 3000 ppi. This method avoids destructive factors and can be conducted using conventional photolithography setups.
The team created a broadband, polarization-insensitive unidirectional imager that operates in the visible spectrum and suppresses image formation in the reverse direction. The device incorporates diffractive structures fabricated through wafer-scale lithography on high-purity fused silica.
A new phosphor-free LED lamp rich in yellow-green spectrum was developed to study its photo-biological effects on human health. The findings show significant enhancements in visual performance and circadian rhythm under illumination from this lamp, revealing the unique benefits of yellow-green spectrum.
Cara Green joins Optica Foundation with over a decade of fundraising experience, focusing on student development and community partnerships. The Optica Foundation supports innovative programs for the next generation of optics leaders.
The applications of OLEDs in wearable electronics include precise light sources for pulse oximeters, targeted light therapy for wound healing, and real-time physiological monitoring. However, challenges persist due to material efficiency, comfort, and signal detection issues, requiring further research to enhance performance.
Researchers have developed bipolar-barrier tunnel heterostructures for high-sensitivity mid-infrared photodetection. The design suppresses majority carriers and facilitates efficient tunneling of photogenerated carriers, achieving outstanding room-temperature specific detectivity.
A new study published in JAMA Network Open reveals that patients with type 2 diabetes prescribed semaglutide or tirzepatide are at increased risk of nonarteritic anterior ischemic optic neuropathy and other optic nerve disorders. The overall risk is low, but highlights the need for close monitoring of these conditions.
Researchers create novel method to control ghost hyperbolic phonon polaritons by launching waves with specially shaped gold nano-antennas, extending travel distance from 20 micrometers to 80 micrometers. This breakthrough enables new technologies such as efficient heat management and reliable quantum information systems.
Researchers discovered topological properties persist in quasi-periodically modulated optical lattices, governed by Fibonacci numbers. The team proposed approximating true quasi-periodic lattices with periodic sequences, leading to the discovery of Fibonacci-derived Chern numbers that dictate beam transport velocity.
Optical vortices have been found to contain a complete skyrmionic texture when Maxwell's longitudinal field is retained. This discovery opens up new possibilities for high-dimensional OAM communication and topologically protected routing in planar photonics.
A team of scientists has successfully demonstrated a more practical and robust method for quantum key distribution, which could lead to secure and cost-effective communication networks worldwide. The breakthrough uses composable security and achieves a secure key rate using simple telecom hardware combined with digital postprocessing.
Scientists create a spatiotemporal light system that emulates the behavior of potential-free Schrödinger equations, generating localized wavepackets without potential energy constraints. This breakthrough could provide new insights into quantum physics and applications in studying light-matter interactions.
A new microscopy technique, Confocal² Spinning-Disk Image Scanning Microscopy (C²SD-ISM), has been developed to overcome limitations of existing super-resolution techniques in deep tissue environments. The system achieves high-fidelity super-resolution with a lateral resolution of 144 nm and performs 3D imaging over large volumes.
Researchers have successfully demonstrated soliton microcombs in X-cut LiNbO3 microresonators, overcoming the challenge of Raman nonlinearity. This breakthrough enables the monolithic integration of fast-tunable, self-referenced microcombs for applications in optical communication, computation, timing, and spectroscopy.
Prof. Andreas Macke receives the Elsevier van de Hulst Prize for Light Scattering, recognized for his work on ice crystal scattering properties and models. Dr Moritz Haarig wins the AS&T Young Scientist Award for outstanding presentation at the International Electromagnetic and Light Scattering Conference.
Researchers have identified diatoms as the dominant microorganisms in a previously mysterious area of the Southern Ocean. The study's findings suggest that diatoms are responsible for the high levels of reflectance observed in satellite images, providing new insights into carbon cycling and ocean biology.
A study found that semaglutide and liraglutide use are associated with a higher risk of nonarteritic anterior ischemic optic neuropathy in older patients with type 2 diabetes. The GLP-1 receptor agonists showed varying levels of risk, with liraglutide posing the greatest threat.
Researchers developed a low-cost visual microphone that listens with light instead of sound, capturing tiny vibrations on surfaces caused by sound waves and turning them into audible signals. The system uses single-pixel imaging to detect sound and can recover high-quality audio using everyday objects like paper cards and leaves.
Researchers from Trinity College Dublin develop a method to harness structural colour using microfabrication technique, enabling ultra-sensitive materials for environmental sensing and biomedical diagnostics. The breakthrough also paves the way for next-generation medical sensors that can track biochemical changes in real-time.
Researchers developed a new 3D printing method that creates strong, high-quality silicon carbide (SiC) ceramic parts at lower temperatures. The method uses vat-polymerization and adds silica to improve material quality, resulting in comparable strength to ceramics sintered at higher temperatures.
A new microscopy technique allows scientists to observe active cells, even in the presence of diseases, and understand how drugs interact with living tissues. The technique has been made available to the scientific community as Open Science, enabling rapid dissemination and further innovation.
Researchers developed a new scattering-type scanning near-field optical microscopy (S-SNOM) technique achieving 1-nm resolution, enabling atomic-scale imaging of materials. This enables studying of atomic defects and nanoscale structures with unprecedented precision.
Researchers have successfully created photon pairs whose entanglement can be tuned, from fully entangled to not entangled at all, by leveraging the asymmetry of the surface. The process uses an asymmetric metasurface made of indium gallium phosphide and exploits optical resonances to enhance efficiency.
Researchers propose sparse-view irradiation processing VAM (SVIP-VAM) to reduce projection data and computation time. The method enables structure manufacturing with a reduced number of projections, increasing the feasibility of sparse-view printing.
Researchers at Chuo University have developed chemically enriched photo-thermoelectric (PTE) imagers using semiconducting carbon nanotube (CNT) films, achieving enhanced response intensity and noise reduction. This enables efficient remote and on-site inspections with palm-sized wireless circuits.