Articles tagged with Optical Spectroscopy
Researchers developed a continuum model to describe the terahertz dielectric response of glasses, revealing the role of transverse shear dynamics in absorption. The model accurately reproduced experimentally measured data, providing a new framework for designing glass materials with low permittivity and low dielectric loss.
Researchers have estimated that the unknown absorber in Venus's clouds must absorb light very efficiently, occur at a high concentration, or both, with a required decadic absorption coefficient reaching approximately 1,278 cm-1 at 375 nm. This suggests that highly absorbing conjugated organic molecules could be the culprit, but the stu...
The Local Volume Mapper is capturing light to reveal the physics and chemistry of stellar birthplaces across vast expanses of the sky in unprecedented detail. Astronomers are analyzing specific spectral lines to map the precise temperature, density, chemical abundance, and motion of interstellar gas.
Astronomers have identified the most pristine star in the known universe, SDSS J0715-7334, with a metal content of less than 0.005%. This ancient immigrant was born about 80,000 light-years from Earth and has been pulled into the Milky Way galaxy over time.
Researchers integrated transient optical spectroscopy with ultrafast electron microscopy to capture both electronic and structural dynamics simultaneously. This enables the study of heterogeneous materials, phase transitions, and light-driven functional responses with implications for solar cells, quantum computing, and next-generation...
Scientists have developed a novel method to control the optical spectra of single-nanoparticle plasmons, enabling high-quality plasmonic hotspots in individual metal nanoparticles. By engineering the photonic substrate beneath the particle, researchers can reshape the electromagnetic environment and dramatically sharpen plasmon resonan...
Researchers developed a new 'frequency-multiplexed elastic metasurface' that can precisely direct elastic waves at distinct frequencies onto different locations, enhancing signal intensity by up to 48 times. This technology breaks the conventional belief that one structure can perform only one function.
Dr. Michael Davis, an astrophysicist at Southwest Research Institute, has been recognized by SPIE as a Fellow for his work on space instruments and UV imaging. He is the optics and detector scientist for NASA's Lunar Reconnaissance Orbiter and Juno mission to Jupiter.
Astronomers at Northwestern University have directly imaged a Tatooine-like exoplanet orbiting two suns, revealing unique insights into how planets form around multiple stars. The discovery provides an unprecedented look at the complex dynamics of binary systems and offers new opportunities to test theories of planet formation.
Researchers discovered how individual MXene flakes behave at the single-flake level, revealing changes in conductivity and optical response. The new spectroscopic micro-ellipsometry technique allowed for non-destructive measurements of individual MXene flakes, providing fundamental knowledge needed to design smarter technologies.
Researchers at Purdue University have developed an algorithm that recovers detailed spectral information from photographs taken by conventional cameras. The method uses computer vision, color science, and optical spectroscopy to achieve high spectral resolution comparable to scientific spectrometers.
The study discovered a giant deformation potential of 123 eV, leading to exceptionally long polarization response times and enhanced spin lifetimes. Small polaron formation was confirmed through various techniques, including optical Kerr spectroscopy, X-ray diffraction, and phonon dynamics.
A new study reports that Raman spectroscopy, a noninvasive technique, can distinguish between abnormal FCD type II tissue and healthy brain cells with remarkable accuracy. This method could provide real-time guidance for surgeons to more accurately identify and remove affected tissue during surgery.
A German-Italian team has discovered a way to simplify the experimental implementation of two-dimensional electronic spectroscopy, allowing for real-time study of electron motion in solids. By adding an optical component to Cerullo's interferometer, researchers were able to control laser pulses more precisely, enabling the investigatio...
Researchers used terahertz spectroscopy to study agave plants' ability to retain water in dry environments. They found that agaves store water in a specialized leaf structure and fructans act like molecular sponges to retain moisture. This discovery could lead to better farming practices and drought-resistant crops
Researchers develop precision techniques using optical sensors and AI to facilitate efficient and accurate food drying. The study discusses three emerging smart drying techniques, providing practical information for the food industry.
Researchers developed a miniaturized all-fiber photoacoustic spectrometer for intravascular gas detection, achieving detection limits of 9 ppb and response times as quick as 18 milliseconds. The system detects trace gases at the ppb level and analyzes nanoliter-sized samples with millisecond response times.
A new technique for detecting long wave infrared photons of different wavelengths has been developed by UCF researchers. This method, based on a nanopatterned graphene, offers dynamic spectral tunability and ultrafast response times, surpassing existing cooled and uncooled detectors.
Researchers have developed a new ultrafast laser platform that generates ultra-broadband ultraviolet (UV) frequency combs with an unprecedented one million comb lines. This achievement provides exceptional spectral resolution and could enhance high-resolution atomic and molecular spectroscopy. The new approach also produces extremely a...
The new issue of Optica Quantum features 10 research articles on quantum information science and technology. New methods for compensating scattering and aberrations in entangled photon systems have been proposed, and ultrafast nonlinear wave mixing spectroscopy schemes employing coherent light pulses and vacuum modes are being explored.
Scientists have developed a groundbreaking 2D electro-polaritonic platform that integrates detection with the same material, overcoming limitations of traditional optical techniques. This breakthrough enables spectrally resolved electrical detection of nanoresonators and significantly enhances photodetection efficiency.
Scientists developed a technique to engineer LHPs with controlled size distribution of quantum wells, improving efficiency and stability in LEDs and lasers. By controlling nanoplatelets' growth, they achieved excellent energy cascades, enhancing photovoltaic performance and stability.
The study found that individuals with higher melanin levels experience decreased signal quality and lower oxygen saturation readings. To enhance reliability, researchers advocate for incorporating melanin level measurements and using specific wavelengths less absorbed by melanin.
A new wearable laser device can non-invasively monitor changes in brain blood flow and volume, offering a simple way to assess stroke risk. The device uses speckle contrast optical spectroscopy to detect early physiological signs of increased stroke risk.
Researchers have developed a new technique to study anisotropic materials, capturing full complexity of light behavior in these materials. The method revealed detailed insights into how light scatters differently along various directions within materials, allowing retrieval of scattering tensor coefficients.
Researchers at the University of Warsaw developed a quantum-inspired super-resolving spectrometer that uses latent information carried by photons to improve spectral resolution. The device offers over a two-fold improvement in resolution compared to standard approaches and has potential applications in optical and quantum networks.
Researchers developed a new spectroscopy method using tunable lasers, enabling precise tracking of the laser's color at every point in time. The technique offers higher power and spectral stability compared to existing methods, making it suitable for various applications including LIDAR and spectroscopy.
Researchers developed CECEM spectroscopy to measure chirality's 'handedness', which affects biological molecule function. The technique offers high spectral resolution, saving time and reducing errors in chiroptical analysis.
Scientists developed a miniaturized micro-spectrometer to detect multiple toxic and greenhouse gases, offering increased control over individual exposure. The technology uses machine learning and metasurface spectral filter arrays to create a compact sensor that can be integrated into wearable devices.
A team of researchers from the University of Maryland has developed a novel way to produce and observe carbenes, a class of highly reactive molecules necessary for life. They successfully formed a carbene called hydroxymethylene (HCOH) by breaking down methanol with pulses of ultraviolet radiation.
Scientists have developed a powerful tool to investigate molecular dynamics in real-time, tracing the evolution of gas-phase furan and uncovering its ring-opening dynamics. The technique, based on attosecond core-level spectroscopy, provides an extremely detailed picture of the relaxation process.
The IRIS beamline at BESSY II has been extended with a nanoscope, enabling the imaging and spectroscopy of structures smaller than a thousandth of a human hair. This upgrade allows researchers to study biological systems, catalysts, polymers, and quantum materials with unprecedented resolution.
Researchers developed a technology to detect infectious disease viruses in real-time using a single nano-spectroscopic sensor. The system uses molecular fingerprinting and can detect specific substances with tailored detection, enabling rapid and precise analysis.
Researchers pioneer technique to control polaritons, unlocking potential for next-generation materials and surpassing performance limitations of optical displays. The breakthrough enables stable generation of polariton particles with enhanced brightness and color control.
Researchers used operando spectroscopy to study the oxygen evolution reaction in iridium oxide catalysts. The team found that binding of reaction intermediates to the electrode was controlled by long-range interactions between the intermediates and the solution, which depended on pH.
Researchers developed a compact swept-source Raman spectroscopy system for identifying both chemical and biological materials. The portable system addresses limitations of bulky dispersive Raman spectrometers, providing accurate results comparable to conventional systems.
Researchers have developed a miniaturized optical sensor that can detect glucose levels in human blood plasma with comparable sensitivity to laboratory-based sensors. The device operates wirelessly using a coin battery and has demonstrated its viability in detecting glucose levels between 50-400mg/dL.
Researchers at the Max Planck Institute of Quantum Optics have successfully developed a new technique for deciphering the properties of light and matter, enabling precise spectroscopy under low-light conditions. This breakthrough opens up possibilities for novel applications in photon-level diagnostics, precision spectroscopy, and biom...
Researchers at Max Born Institute have successfully implemented high-resolution linear-absorption dual-comb spectroscopy in the ultraviolet spectral range. This breakthrough enables experiments under low-light conditions, paving the way for novel applications in precision spectroscopy and biomedical sensing.
Researchers at UNIST have developed a method to measure nanometer-sized samples within a transmission electron microscope, utilizing nano-thermometers based on cathodoluminescence spectroscopy. The technique offers improved accuracy and spatial resolution compared to conventional methods.
Researchers developed a novel machine learning-based approach to analyze diffuse reflectance spectroscopy data, achieving higher accuracies and speeds than existing methods. The 'wavelength-independent regressor' model overcomes use-error limitations by incorporating diverse datasets, making it suitable for clinical settings.
Researchers have developed a novel 'nano active control platform' to control excitons and trions, providing valuable insights into the optical properties of two-dimensional semiconductors. The breakthrough discovery enables real-time analysis of nano-light properties with exceptional spatial resolution.
Researchers at UC San Diego used terahertz time-domain spectroscopy to observe anomalous terahertz light amplification in Ta2NiSe5, uncovering its exciton condensate properties. This technique may allow for the discovery of new light-induced phenomena and their potential applications in entangled light sources.
Researchers use water as a nonlinear medium to create a supercontinuum white laser covering an impressive spectral range from UV to far infrared. The resulting ultrabroadband source has potential in ultrafast spectroscopy, hyperspectral imaging, and scientific research.
Researchers developed a method to observe single protein vibrational spectra using near-field optical microscopy, enabling detailed analysis of extremely small samples. The technique represents a major breakthrough for ultra-high sensitivity and super-resolution infrared imaging, as well as single-molecule vibrational spectroscopy.
Researchers develop a versatile imaging system for targeted spectroscopy in the eye fundus, allowing for continuous color imaging and spectral measurements. The system enables users to select targets and move them to any location within the eye fundus region without realignment or fixation changes.
Researchers have identified a population of massive stars stripped of their hydrogen envelopes by their companions in binary systems. These hot helium stars are believed to be the origins of hydrogen-poor core-collapse supernovae and neutron star mergers, shedding new light on a long-theorized phenomenon.
Researchers from Rice University and Durham University discovered a rotating disc of material circling a massive young star outside the Milky Way. The finding provides strong evidence for the formation process of high-mass stars, which are several times bigger than the Sun.
Researchers from China University of Petroleum apply terahertz spectroscopy to characterize oil shale's anisotropy, organic distribution, and fingerprint spectrum. The method enables simultaneous characterization of main oil generation zones and natural gas zones.
Astronomers using the JWST have created the deepest spectrum of a distant galaxy ever seen, revealing the presence of eight distinct elements including nickel. The study helps scientists understand how galaxies mature and evolve over time, with surprising findings on the chemical composition of ancient galaxies.
Researchers have successfully excited a scandium-45 nuclear isomer using X-ray pulses, paving the way for the creation of the world's most precise clock. The breakthrough has significant implications for fields such as nuclear physics, satellite navigation, and telecommunications.
Researchers from Fudan University and others report a new method to analyze lattice vibrations and excitations in materials using terahertz difference frequency mixing. The technique offers sub-monolayer sensitivity for studying interface properties of complex oxides.
Scientists generate and control coherent polaron oscillations, enabling the manipulation of dynamic electric properties of polar liquids. The study demonstrates the importance of many-body interactions in polar molecular ensembles.
Scientists have developed a nonrelativistic and nonmagnetic mechanism for generating terahertz waves, harnessing the electrical anisotropy of two conductive oxides. This approach produces signals comparable to commercial terahertz sources and offers a high terahertz conversion efficiency.
Researchers found that adding niobium oxide to silicate glass increases bond density and connectivity, enhancing mechanical and thermal stability. This discovery could lead to the development of innovative glass formulations for various applications, including optics, medicine, and data transmission.
Astronomers have confirmed that Maisie's galaxy is among the earliest galaxies detected by the James Webb Space Telescope. The galaxy, first spotted last summer, is estimated to be 390 million years after the Big Bang, making it one of the four earliest confirmed galaxies observed.
Researchers at UBC Okanagan's Integrated Optics Laboratory develop imaging systems that apply terahertz radiation, enabling fast and accurate characterization of biological specimens. This technology holds promise for improving diagnostic imaging and detecting carcinogenesis.
A new technique combining ultrafast physics and spectroscopy reveals the dance of molecular 'coherence' in unprecedented clarity. This shows a vibrational effect, rather than motion for the functional part of the biological reaction that follows.
Researchers have discovered a way to utilize nonlinear scattering media for optical computing and machine learning. They created a novel theoretical framework involving third-order tensors, which can represent the complex relationships between input and output signals. This breakthrough has potential applications in real-world settings...
The study investigated high harmonic spectroscopy as a method to observe topology in materials. Despite thorough analysis, the researchers found that non-topological aspects of the system dominated its response, suggesting that topology may play a minor role.