Articles tagged with Laser Spectroscopy
Researchers at Max Planck Institute develop technique to interrogate molecules on surfaces with spectroscopic precision, reaching the ultimate quantum limit. This breakthrough enables study of molecule-surface interactions and molecular quantum technologies.
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.
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 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.
The study measures ultrafast electron dynamics in hydrogen molecules, observing oscillations in hole localization that depend on the delay between attosecond pulses. Entanglement occurs at the expense of electronic coherence in the remaining ion.
A University of Virginia researcher is developing an alternative method to remove nitrate from wastewater by converting it into valuable chemical products. The project uses electrocatalysis and modulation excitation spectroscopy to optimize the conversion process, aiming to reduce energy consumption and environmental impact.
Researchers have confirmed the Standard Model of particle physics with unprecedented accuracy, solving the proton radius puzzle and verifying predictions up to the 13th decimal place. The new results set a new benchmark in measuring the energy levels of hydrogen atoms.
A University of Houston optometry researcher warns of the dangers of red-light laser myopia therapy for children, citing vision damage reports and the need for rigorous safety validation. The professor's quality improvement study found that two popular devices exceeded national standards for safety classifications.
A nanostructure composed of silver and an atomically thin semiconductor layer can be turned into an ultrafast switching mirror device, displaying properties of both light and matter. This discovery could lead to dramatically increased information transmission rates in optical data processing.
Researchers at the Max Born Institute developed a laboratory-scale soft-X-ray instrument to study ultrafast processes of emergent textures in magnetic materials. They observed nanoscale magnetic maze domains and discovered complex reorganization patterns on picosecond to nanosecond timescales.
Scientists at Max Born Institute develop technique to generate µJ-level tunable few-fs UV pulses in VUV range. They successfully characterized few-fs pulses tuned between 160 and 190 nm using electron FROG, revealing pulse duration of 2-3 fs.
A UNF chemistry professor has been awarded a NSF grant to build a custom LIBS system and develop new calibration strategies. The project aims to improve trace-level analyte detection and transform not only LIBS but also other analytical technologies.
Using extreme ultraviolet high-harmonic interferometry, researchers tracked changes in the electronic bandgap of silica glass and magnesium oxide under strong laser excitation. The study found a shrinking bandgap in silica and a widening bandgap in magnesium oxide.
Researchers use innovative technique to measure vibration frequency of H₂⁺ ion, improving accuracy by three orders of magnitude. The measurement enables precise calculation of fundamental natural constants, including proton-to-electron mass ratio.
Researchers have made a significant breakthrough in controlling ultrafast spin dynamics by accelerating demagnetization speed with external magnetic fields. This discovery opens up new avenues for designing multifunctional spintronic devices with field-programmable operations.
Scientists generate collective molecular vibrations in a liquid by placing an electron ultrafast. These vibrations govern the electric behavior of the liquid and can be tuned to adapt its properties. The study reveals new insights into polar liquids' dynamics.
Birgitta Schultze-Bernhardt is developing a portable device that can determine the concentration of several gaseous pollutants in ambient air with utmost accuracy, measuring three pollutants simultaneously. The device will enable real-time monitoring of pollution levels in cities and industrial areas.
Physicists at Harvard SEAS have created a compact, on-chip mid-infrared pulse generator that can emit short bursts of light without external components. This device has the potential to speed up gas sensor development and create new medical imaging tools.
Zheming Wang, a PNNL scientist, has been recognized by the American Association for the Advancement of Science as an AAAS Fellow. His research focuses on the chemistry underlying radioactive and advanced energy materials, with notable contributions to studying f block elements.
Researchers developed a compact, solid-state laser system that generates 193-nm coherent light, marking the first 193-nm vortex beam produced from a solid-state laser. This innovation enhances semiconductor lithography efficiency and opens new avenues for advanced manufacturing techniques.
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
For the first time, scientists have measured the quantum state of electrons ejected from atoms after absorbing high-energy light pulses. This technique provides a new way to study the interaction between light and matter, with potential applications in various fields of research.
Researchers developed a highly sensitive laser gas sensor using a four-prong quartz tuning fork, outperforming traditional sensors in terms of sensitivity and signal-to-noise ratio. The new design improves detection performance for trace gases such as acetylene, enabling applications in industrial production, medical diagnosis, and fir...
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.
The research proposes a method for narrowing the QCL linewidth via optical feedback, reducing complexity and enhancing SNR. The approach results in high-precision spectral measurements of greenhouse gases like N2O.
Researchers from the University of Liverpool and international collaboration measure nuclear radius of nobleium and fermium isotopes using laser spectroscopy. The study reveals smooth trends in charge radii and reduced influence of shell effects at superheavy element levels.
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...
Researchers studied fermium isotopes with different neutron numbers, revealing a steady increase in nuclear charge radius across the neutron number 152. The experimental results confirmed theoretical predictions on nuclear shell effects and paved the way for further laser spectroscopic studies of heavy elements.
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.
A study of human skeletal remains from the Tudor warship Mary Rose reveals that handedness may influence clavicle bone chemistry as people age. The analysis found increased mineral content and decreased protein content in right clavicles compared to left, suggesting repeated stress on the right side during activities like sailing.
Researchers designed a multipass cell with dense spot patterns to enhance laser absorption spectroscopy gas sensors. The new design achieved high sensitivity and selectivity, enabling the detection of methane at low levels.
Researchers developed femtosecond-fieldoscopy, enabling precise measurement of liquid quantities and detecting target molecules in aqueous environments. The technique opens up possibilities for label-free bio-imaging and advanced biomedical applications.
Scientists at the University of Tokyo have developed a new system that increases the measurement rate of Raman spectroscopy, a technique used to identify molecules. This improvement enables faster identification of molecules and cells, with applications in biomedical diagnostics and material analytics.
Researchers at HSE University identified universal critical indices for calculating fibre laser characteristics and operating regimes. The study enables predictions of laser parameters and facilitates optimisation for various applications.
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.
A new structure of light has been discovered that can accurately measure chirality in molecules, a property of asymmetry important in physics, chemistry, biology, and medicine. This 'chiral vortex' provides an accurate and robust form of measurement, allowing for the detection of chiral biomarkers.
A new SERS microfluidic system was developed by Shanghai Jiao Tong University researchers, achieving a detection limit lower than 10 ppt of harmful substances. The system uses femtosecond laser-induced nanoparticle implantation into flexible substrate for sensitive and reusable microfluidics detection.
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.
Scientists have developed a method to accelerate spectroscopic analysis, enabling real-time measurements. The technique utilizes compressed sensing and strategically randomized measurement points to reconstruct signals with fewer data points, overcoming the challenge of temporal overlap between pulses.
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.
This article discusses ultrafast plasmonic materials for all-optical switching and pulsed lasers, highlighting their potential in photonics applications. Researchers have explored various ultrafast plasmonic systems, including metasurfaces made of noble metals and phase-change hybrid materials.
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.
A new type of frequency comb, called a microcomb, is developed by Stanford researchers that can be used to measure light with unprecedented precision. The device is innovatively small, ultra-energy efficient, and exceptionally accurate, making it suitable for widespread adoption in everyday electronics.
Researchers successfully cooled positronium atoms to record-low temperatures of 170 K, significantly reducing their transverse velocity component. This achievement has far-reaching implications for precision spectroscopy and the study of quantum electrodynamics.
A team of researchers from the Max Born Institute has demonstrated a new approach to all-attosecond pump-probe spectroscopy using a compact intense attosecond source. This enables the investigation of extremely fast electron dynamics in the attosecond regime, which is not accessible by current attosecond techniques.
Scientists use a special microscope to break up the bond between electrons and holes in semiconductors, revealing that hole interactions determine charge transfer processes. The findings have implications for future computer and photovoltaic technologies.
Researchers developed a compact microscope using a single photon avalanche diode array detector, enabling super-resolution imaging with improved signal-to-noise ratio and spatial resolution. The system also combines fluorescence lifetime measurements for enhanced structural specificity.
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 have developed a new approach to monitor ultrafast charge motion in strongly correlated solids, demonstrating phase transitions within femtoseconds. The technique offers sub-cycle temporal resolution and opens up new avenues for investigating ultrafast phenomena in correlated materials.
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 observe changes in water molecule movement near a metal electrode depending on the magnitude and polarity of the applied voltage. The study provides crucial insights into electrochemical reactions and paves the way for designing more efficient battery technologies.
Researchers at Rice University have discovered a way to transform a rare-earth crystal into a magnet by using chirality in phonons. Chirality, or the twisting of atoms' motion, breaks time-reversal symmetry and aligns electron spins, creating a magnetic effect.
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.
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.
Lehigh University researchers have developed a technique using machine learning and advanced spectroscopy to characterize waste feedstocks for gasification-produced hydrogen. This process has the potential to eliminate hazards associated with stored coal waste and reclaim valuable resources, while also emitting fewer pollutants than tr...
Scientists at the University of St Andrews have developed an electrically driven organic semiconductor laser, overcoming a decades-long challenge. This breakthrough has significant implications for various industries, including communication, medicine, and manufacturing.
Scientists have successfully measured the speed of molecular charge migration in a carbon-chain molecule, revealing a movement of several angstroms per femtosecond. The study used a two-color high harmonic spectroscopy scheme with machine learning reconstruction to achieve a temporal resolution of 50 as.