Articles tagged with Laser Spectroscopy
Researchers employed laser-induced breakdown spectroscopy, FTIR, and Raman spectroscopy to analyze gemstones from the Arabian-Nubian Shield. The study distinguished natural gems from synthetics and isolated elements contributing to their quality, shedding light on ancient trade routes.
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.
Researchers at Heinrich-Heine University Duesseldorf have measured the wave-like vibration of atomic nuclei with record-breaking precision, confirming the accuracy of quantum theory. The study also explores the possibility of a new fundamental force between protons and deuterons in connection with Dark Matter.
Researchers develop a new technique to detect circulating tumor cells in blood, overcoming noise issues with existing methods. The dual-ratio approach enhances penetration range and accuracy, paving the way for quicker diagnosis of metastasis.
Researchers successfully fabricate a microlens on a single-mode polarization-stable VCSEL chip using 2-photon-polymerization 3D printing, reducing beam divergence from 14.4° to 3° and enabling compact optical gas sensors with improved performance.
Researchers discovered bimetallic tartrate complexes with unique structures, formed by insufficient ligand, leading to improved sensor characteristics for microbiosensors. The study showcases the potential of laser-induced chemical liquid phase deposition for creating nanostructures with various applications.
Researchers developed a polarization-angle-resolved Raman microscope to visualize disorder effects on ferroelectric polarization. The study reveals slow response of nanometer-scale electric polarization, enabling significant charge storage and enhanced dielectric properties.
The InVADER Mission successfully deployed a high-tech laser laboratory on the ocean floor, marking a paradigm shift in ocean research and exploration. The Laser Divebot collects compositional data without disturbing the environment, removing the need for physical samples.
An international team of researchers has developed a new method to study the thorium-229 isotope using lasers in the visible wavelength range. This approach could lead to precise measurements of the isomeric state's energy level, enabling tests of fundamental physics questions and potentially paving the way for a nuclear clock.
Researchers developed Plasma-grating induced breakdown spectroscopy (GIBS) and Multidimensional plasma grating induced breakdown spectroscopy (MIBS) techniques to overcome LIBS limitations. These novel methods exhibit heightened sensitivity and accuracy in detection, particularly for solution detection.
Researchers develop innovative data compression scheme to facilitate multispeckle diffuse correlation spectroscopy with high pixel resolutions, enabling non-invasive measurement of brain blood flow. The scheme uses field-programmable gate array compression to alleviate computational burdens and expand the use of SPAD cameras in biomedi...
A 6-year grant of $1.65 million will support a training program for ultrafast laser science and technology, connecting university researchers and industry partners across Canada. The TrUST project aims to develop knowledge networks and practices in this field, promoting socio-economic development and innovation.
Researchers at West Virginia University are exploring iodine-based thrusters as an alternative to traditional fuel sources, aiming to reduce dependence on rare noble gases. They plan to develop diagnostic technology to measure the performance of these thrusters, paving the way for widespread use in space exploration.
A team of physicists and physical chemists from the University of Würzburg and the University of Ottawa has developed a new method to separate single and multiple excitations in laser spectroscopy. This breakthrough resolves a decades-old problem, enabling accurate analysis of materials and fundamental physical phenomena.
Scientists developed a sensitive nanostructured silver surface to detect arsenic in water, food and soil using surface-enhanced Raman spectroscopy (SERS). The new technique is more sensitive and easier to produce than existing methods, making it ideal for on-site field assays.
A water droplet acts as a model of an atom when illuminated by laser light, allowing researchers to study resonance phenomena and energy levels. The droplet's size changes due to evaporation, creating a visible 'optical atom' that can be used to analyze water quality and detect pollutants.
Researchers have developed a new spectroscopy technique called filament- and plasma-grating-induced breakdown spectroscopy (F-GIBS), which improves the sensitivity of trace metal detection in liquid samples. The technique uses fluid jets to analyze aqueous solutions and achieves high precision by avoiding detrimental influences of liqu...
Scientists have successfully filmed the impulsive response of bound electrons to intense XUV pulses using a new photoelectron spectroscopy. The technique provides a novel method for time-resolved imaging of ultrafast bound-state electron processes in intense laser fields.
Researchers at the University of Ottawa have developed a new technique to differentiate the mirror images of a chiral molecule, a problem that was believed to be unsolvable for nearly 20 years. The team used linear polarized helical light beams to enhance sensitivity and observed differential absorption in achiral molecules.
Researchers studying exotic atom muonium aim to detect deviations from the Standard Model, which could reveal new physics. By measuring energy levels with unprecedented precision, they may uncover evidence for additional particles or forces that explain the muon's misbehavior.
Researchers at the University of Rochester used x-ray spectroscopy to study radiation transport in dense plasmas. They found that atomic energy level changes do not follow conventional quantum mechanics theories, instead conforming to a self-consistent approach based on density-functional theory.
Scientists at Swinburne University of Technology and FLEET collaborators observe and explain signatures of Fermi polaron interactions in atomically-thin WS2 using ultrafast spectroscopy. Repulsive forces arise from phase-space filling, while attractive forces lead to cooperatively bound exciton-exciton-electron states.
Researchers from the Institute of Physical Chemistry, Polish Academy of Sciences, recorded double Hopf bifurcation behavior of light during laser operation. They also demonstrated real-time experimental observation of the phenomenon and proposed a new methodology to interpret the observed dynamics.
Researchers developed a new analytical instrument using an ultrafast laser to measure hydrogen concentration and temperature, advancing greener hydrogen-based fuel studies. The instrument's capabilities will help develop more environmentally friendly propulsion engines.
Researchers at Texas A&M University created a device that harnesses quantum fluctuations to enhance spectroscopy results in Brillouin microscopy, increasing image clarity and accuracy. The new source significantly improves the signal-to-noise ratio, allowing for better visualization of biological structures and properties.
Researchers characterize material properties of IP-Q using Raman spectroscopy and nanoindentation, revealing elastic parameters and their effects on acoustic behavior. The study optimizes elastic parameters for TPP-fabricated structures, benefiting applications in life science, mobility, and industry.
Researchers observed a novel type of excitation, called a polaron, where collective oscillations of the electron and its screening cloud arise at terahertz frequencies. These oscillations persist for tens of picoseconds and are impulsively triggered by ultrafast electron localization.
The researchers successfully demonstrated attosecond-pump attosecond-probe spectroscopy to study non-linear multi-photon ionization of atoms. The experiment showed that the absorption of four photons from two attosecond pulse trains led to three electrons being removed from an argon atom.
A new technique uses air lasing and coherent Raman spectroscopy to detect greenhouse gases with high sensitivity and multi-component measurement capabilities. The detection reaches a level of 0.03% and can distinguish between CO2 isotopes.
A team of scientists developed a method to generate molecular triplets in colloidal nanocrystals through rapid spin-flip, which can be used for photochemical applications such as photon upconversion and singlet oxygen generation. The study demonstrates the potential of solution-processed semiconductor materials for new fields.
Researchers developed a new reagent-free detection technique for SARS-CoV-2 using Raman spectroscopy and machine learning. The method shows an accuracy of 80% in detecting COVID-19 infections from saliva samples, overcoming limitations of RT-PCR testing.
Researchers have successfully cooled a pair of highly charged ions to an unprecedentedly low temperature of 200 µK using quantum algorithms. This achievement brings the team closer to building an optical atomic clock with highly charged ions, which could potentially be more accurate than existing clocks.
A team of researchers at Shinshu University has successfully observed proton transfer between the titania surface and a dye molecule during UV light irradiation. The study used time-resolved fluorescence spectroscopy to measure the formation of basic hydroxyl groups on the titania surface, which accepts protons from the dye.
A lung model mimicking complex anatomy has enabled the assessment of respiratory volumes using a gas-in-scattering-media absorption spectroscopy (GASMAS) technique. The study demonstrates the feasibility of GASMAS to sense changes in gas volume in a controlled environment, paving the way for potential clinical applications.
A team of scientists developed a photon-counting distributed free-space spectroscopy (PDFS) to analyze atmospheric gas composition. The method provides range-resolved spectra of CO2 and HDO over 6 km, offering insights into chemical processes in the atmosphere.
Researchers at the University of Konstanz have discovered that MXenes can be switched repeatedly between a flat and a rippled shape by applying femtosecond laser pulses. This discovery could lead to improved energy storage capacity, enhanced catalytic or antibiotic activity, and new applications in sensing and active plasmonic devices.
Researchers developed a novel detector system using superconducting nanowire single-photon detectors to measure cerebral blood flow. The SNSPD-DCS system showed significant improvement in signal-to-noise ratio compared to conventional SPAD-based DCS, allowing for clearer detection of arterial pulses.
For the first time, scientists have successfully used transient grating spectroscopy with ultrafast X-rays to explore material properties at the atomic level. This method allows for the observation of individual atoms and selective measurement of specific chemical elements in a mixture of substances.
Plasma-grating-induced breakdown spectroscopy (GIBS) overcomes the drawbacks of traditional LIBS techniques, achieving a signal intensity enhancement of more than three times. This technique utilizes a plasma grating to improve measurement stability and sensitivity.
Researchers demonstrate graphene heterogeneous fiber micro resonator, generating dissipative soliton mode-locked laser combs with dynamic tunability. The graphene device provides opto-electric stabilization, reducing phase noise to instrument-limited floor, -130 dBc/Hz at 10 kHz offset.
Researchers Nathalie Picque and Theodor Hänsch developed dual-comb spectroscopy to detect spectral patterns even in extremely low light conditions. This technique enabled the recording of broad spectra with over 100,000 colors in near complete darkness.
Researchers have created a novel ultrafast coherent light source in the extreme ultraviolet wavelength region with multi-MHz range repetition rates. The system utilizes intracavity high-order harmonic generation and achieves a repetition rate of 3 MHz, suitable for applications such as ultrafast XUV spectroscopy.
Researchers have made the first-ever measurements of liquid water at extremely cold temperatures, revealing that it exists in two distinct structures that co-exist and vary in proportion dependent on temperature. This discovery provides long-sought experimental data to explain water's bizarre behavior at low temperatures.
Researchers developed a new technique using Laser Raman spectroscopy to analyze mineral-organic aggregations (MOA) for estimating thermal maturity levels in high and over-mature marine shales. This method provides an alternative solution for evaluating maturity in lower Paleozoic and Precambrian shales with rare organic matter.
Researchers have developed a novel powder method for efficiently evaluating electro-optic coefficients, enabling the discovery of promising new crystals. The approach uses second harmonic generation, infrared reflectance spectrum, and Raman spectroscopy to predict electro-optic coefficient magnitude.
University of Rochester researchers have created a new device that enhances ultrafast laser pulses, producing the shortest pulse ever from a gain-free fiber source. The technology has significant implications for various engineering and biomedical applications, including spectroscopy and frequency synthesis.
The 'Gamma Factory' initiative aims to develop a high-intensity gamma rays source using accelerated ion beams and laser beams. This will enable detailed investigations into atomic nuclei and facilitate breakthroughs in spectroscopy.
Researchers from Peter the Great St.Petersburg Polytechnic University and Tsinghua University created a dynamic light scattering method to determine immune complex sizes in blood serum. The new method can detect diseases, such as autoimmune disorders and cancer, by analyzing changes in immune complex concentrations.
The new LRC approach enables the investigation of superheavy elements with extreme sensitivity, even at low production quantities. By combining laser spectroscopy and ion mobility spectrometry, researchers can unveil element-specific emission spectra, providing valuable insights into the electronic structure of these exotic atoms.
Researchers at Harvard University have successfully generated frequency combs using turbulence in light, contradicting current laser theory. The discovery could lead to more efficient and compact devices for applications such as telecommunications and portable sensing.
Researchers have developed a novel scheme for THz dual-comb spectroscopy that requires only a single laser source while maintaining exceptional resolution. The use of adaptive sampling technique minimizes timing instability and allows for accurate detection of small variations in the absorption profile of materials.
Graphite exhibits stronger interplanar bond strength than previously believed, with an elastic constant of nearly 50 GPa, due to a short-range correlation effect selectively strengthening the potential energy surface. This discovery was made using a new ultrasonic measurement technique on defect-free monocrystalline graphite.
Tropical forests are losing carbon storage potential over time due to changes in structure and function at forest edges. Along these boundaries, the study found aboveground carbon storage declines of 22% up to 100 meters from the edge.
The Ferdinand-Braun-Institut presents its developments in diode lasers and UV LEDs, including high-power stacks for industrial laser technology and a compact dual-wavelength system for SERDS spectroscopy. The institute also exhibits a terahertz camera sensor with high sensitivity and fast response time.
Researchers use millimeter-wave spectroscopy to observe reaction products, determining the structure of the transition state for the first time. The study identifies two different transition states and suggests additional mechanisms may be involved.
A team of researchers has generated multi-millijoule 3-cycle pulses at an unprecedented average power level of 318 W, paving the way for industrial applications. The achievement marks a significant milestone in few-cycle laser technology and opens up new possibilities for highly parallelized material processing.
Researchers from the University of Bayreuth and Göttingen have discovered a way to control ultrashort laser pulses, enabling precise material analyses and medical procedures. The new technique involves manipulating soliton pairs in laser pulses, allowing for efficient adjustment of pulse intervals.
Researchers used an extremely bright mid-infrared laser to perform spectroscopic ellipsometry, capturing high-resolution spectral information in under a second. The new approach offers insights into quickly changing properties of samples and could improve manufacturing processes and scientific discoveries.
Frequency combs are widely-used tools for measuring and detecting different frequencies of light. Researchers from Harvard SEAS have found that some lasers use a variational principle to maintain constant intensity in the face of changing frequencies.
Michigan State University researchers have measured the nuclei of three protein-rich calcium isotopes, revealing unique patterns in their charge radii. The findings, which challenge existing theories, are attributed to a better understanding of proton interactions at large distances outside the nucleus.