Articles tagged with Laser Spectroscopy
Researchers have developed a method to narrow the emission spectrum of an ordinary diode laser, making it suitable for spectroscopic chemical analysis. The technique uses optical microresonators to generate frequency combs, which can be used in applications such as security monitoring systems and lidars for self-driving cars.
Researchers at OIST have discovered a new method to manipulate electrons on the nanometer scale using light. By inducing electric fields on material surfaces, they can control electron flow within specific areas, potentially leading to faster and better functioning devices.
Scientists have created a non-invasive instrument that uses optical trapping and Raman spectroscopy to study individual cells in real-time. The technique allows for the analysis of cell interactions and molecular differences without damaging or labeling the cells.
Researchers successfully measured the optical excitation of atomic levels in nobelium isotopes using laser spectroscopy. The results confirm that nobelium nuclei are deformed like an American football, with a lower charge density in their center than at their surface.
A new technique enhances power output of single-mode lasers, enabling terahertz spectroscopy applications. The technique introduces a hybrid second- and fourth-order Bragg grating in the laser's optical cavity.
Researchers at PTB have successfully measured some important properties of the thorium-229 nucleus using optical methods, bringing scientists closer to developing an optical nuclear clock. This breakthrough uses laser excitation to monitor the nucleus's behavior and could lead to a more precise atomic clock.
Researchers from Swansea University have conducted the most precise direct measurement of antimatter ever made, revealing the spectral structure of antihydrogen atoms in unprecedented detail. The result surpasses previous measurements by a factor of 100, bringing us closer to testing fundamental symmetries like CPT invariance.
A new laser-based system can detect small methane leaks over an area of several square miles, allowing for continuous monitoring of costly and dangerous leaks. The technology uses frequency comb laser spectroscopy to pinpoint the location and size of leaks with high sensitivity and range.
A team of researchers at NIST developed a new laser source, called frequency combs, to detect chemicals with greater sensitivity. These lasers can pass through samples without direct contact, enabling remote spectroscopy and high-sensitivity measurements for applications such as breath analyzers, cancer detection, and explosives tracking.
A team of researchers has successfully developed an imaging technique that can monitor the movement of atomic units at a high resolution of 300 nanometers. The technology is expected to be used in the development of new materials, solar cells, and catalysts.
Researchers miniaturized dual-frequency combs on a single chip using a single laser, enabling real-time sensing and spectroscopy in field environments. The device can detect a broad range of chemicals with high precision, paving the way for commercialization in the future.
Researchers have created a novel optical biopsy method using resonance Raman scattering to detect diseases like skin cancer and brain cancer at the molecular level. This non-invasive technique provides more detailed information and can detect diseases in mere seconds.
Researchers at U-M have developed a technique to detect chemicals, including explosives and gases, quickly and accurately using a laser-based method. The new approach combines two techniques to speed up detection while preserving accuracy.
Physicists observe that electrons emitted from different initial states in a solid material arrive at the surface last, contrary to intuition. Theoretical models are revised to account for intra-atomic interactions, which affect electron motion and lead to a new understanding of photoemission.
A new breakthrough in food analysis using supercontinuum lasers can measure whole grains non-destructively and accurately predict health-promoting properties like beta-glucan content. This technology has great potential for improving the quality of food products, including bread and beer.
Researchers have created a terahertz saturable absorber using graphene produced by liquid phase exfoliation, enabling ultrafast lasers with high modulation. The devices have great potential for applications such as time-resolved spectroscopy of gases and molecules, quantum information, and ultra-high speed communication.
Researchers will construct an advanced dark matter detector based on magnetic sensors, aiming to detect invisible mass in the universe. The project brings together experts in various fields to observe dark matter directly.
Researchers at Kyushu University's CENTER FOR ORGANIC PHOTONICS AND ELECTRONICS RESEARCH (OPERA) reported a breakthrough in developing new organic thin-film lasers that can continuously emit light for up to 30 ms, outperforming previous devices.
A new laser-induced breakdown spectroscopy (LIBS) approach refines detection of mercury in landfill leachate, offering rapid results without generating hazardous chemicals. The technique's sensitivity is improved through a double-pulse setup, allowing for the detection of lower mercury concentrations.
Researchers at INRS have developed a new pulsed laser with an ultra-narrow spectral width of 105 MHz, breaking the optical bandwidth record. The compact architecture enables full-spectrum resolution in the radio frequency domain, opening up opportunities for on-chip integration and novel sensing applications.
Sushil Kumar aims to create terahertz semiconductor lasers with precise emission frequency, improving power output and beam quality. His goal is to enable various applications including chemical sensing, disease diagnosis and remote-sensing in astronomy.
A UCF team led by Assistant Professor Arkadiy Lyakh has developed a simpler process for creating quantum cascade lasers, offering comparable performance and better efficiency. The new method uses only two different materials, making production more practical.
Physicists devise a method to control optical solitons in microresonators, allowing for stable pulse generation and spectral comb formation. This enables precise measurement of optical frequencies, including those in the radio wave range.
A new, broad-band tunable infrared laser from Northwestern University offers high-power rapid tuning and has implications for detecting drugs and explosives. The robust, all solid-state laser can be rapidly tuned to capture unique spectral fingerprints of gases.
Researchers created an efficient diode-pumped eye-safe laser using GdAl3 single crystals co-doped with Er and Yb. The laser emits safe wavelengths for human eyes and has advantages in telecoms due to low atmospheric losses.
Researchers at the University of Bath created a new type of laser that can emit mid-infrared light between 3.1 and 3.2 microns, a range previously difficult to achieve. The breakthrough uses silica hollow-core fibers to confine light and enable gas-mid-IR interaction.
Researchers at the University of Bath created a new laser capable of pulsed and continuous mid-infrared emission between 3.1-3.2 microns, overcoming a major challenge in laser development. The achievement uses silica hollow-core fibers to confine light and gas, enabling efficient interaction and mid-IR emission.
Researchers have developed a technique that enables the detection of single molecules of contaminants, explosives, or diseases using a combination of surface-enhanced Raman scattering (SERS) and a slippery surface. This innovation has vast applications in analytical chemistry, molecular diagnostics, environmental monitoring, and nation...
Researchers at City College of New York have introduced a new optical window, dubbed the Golden Window, which enables deeper brain tissue imaging. This breakthrough has significant implications for the noninvasive study of the brain and breasts, reducing scattering that causes blurring in previous methods.
Researchers measured variations in energy transition within cadmium atom isotopes, identifying physical cause of shift within nucleus. Two main factors influence hyperfine structure: magnetic field from electrons and nuclear electric quadrupole moment.
A team of physicists has successfully cooled highly-charged ions to sub-Kelvin temperatures, forming a Coulomb crystal that opens up new fields in laser spectroscopy. This breakthrough enables precision tests of quantum electrodynamics, measurement of nuclear properties, and laboratory astrophysics.
Scientists at Berkeley Lab have developed a unique microring laser cavity that can produce single-mode lasing even from conventional multi-mode laser cavities. This breakthrough holds implications for optical metrology, interferometry, data storage, spectroscopy, and communications.
Researchers have developed a new method using laser-induced breakdown spectroscopy to distinguish between gutter oil and safe, edible oil. The technique uses principal component analysis and artificial neural networks to detect toxic substances like bacteria and heavy metals.
Scientists at the Ames Laboratory used ultra-fast laser spectroscopy to examine the electronic properties of iron-based superconductors, finding evidence of an electronically-driven nematic order. This breakthrough sheds light on the transition from normal to superconducting states and holds potential for advancing energy technologies.
Researchers have developed new techniques using lasers, LEDs, and optics to visualize and analyze the skin's structure and function. These methods hold promise for various medical applications, including burn treatment, cancer detection, and wound healing.
Researchers at CERN have successfully measured the ionization potential of astatine, a radioactive element with limited knowledge. The study used a novel laser-based technique to determine its binding energy, shedding light on its chemical behavior and potential applications in cancer therapy.
Researchers are exploring X-ray imaging on the attosecond timescale to better understand chemical reactions and interactions. Key findings include the importance of multidimensional nonlinear x-ray spectroscopy and the need for precise beam characteristics.
Four Pacific Northwest National Laboratory scientists, Nigel Browning, Allison Campbell, Anthony Peurrung, and Douglas Ray, have been elected as AAAS fellows. They were recognized for their contributions to electron microscopy, thin film synthesis, radiation detection, and national security programs.
A new sensor uses a phenomenon called photoacoustic effect to detect and identify chemicals, including nerve agents. The system can identify multiple agents simultaneously in real-time, with potential applications for detecting hazardous gases.
LAMIS, a green chemistry alternative for laser spectroscopy, can precisely date the geological age of Martian samples. By analyzing molecular isotopes, LAMIS offers a faster and less expensive method compared to traditional mass spectrometry technologies.
The Manchester FLITES project aims to produce first-ever images of chemical species in aero-engine exhaust plumes using novel fibre lasers. The four-year study will focus on lowering carbon dioxide emissions, enhancing turbine-related research and development capacity.
The ALPHA Collaboration has successfully stored a total of 309 antihydrogen atoms for up to 1,000 seconds, far exceeding the time ordinary atoms can be magnetically confined. This achievement opens a path to new experiments with antimatter and measures matter-antimatter asymmetry with precision.
Researchers at EPFL and EMPA developed a technique to improve control over laser parameters, including wavelength and polarization. This innovation boosts high-speed optical fiber communications with reduced errors, while also enabling energy-efficient lasers and precise spectroscopic applications.
Scientists have developed a powerful new technique to visualize the underpaintings of famous artworks by Rembrandt, Caravaggio, and Rubens. The scanning macro X-ray fluorescence analysis allows for detailed imaging of the composition of underpaintings without harming priceless artwork.
Researchers at TUM developed a new method to measure photocurrent in nanoscale photodetectors with picosecond precision, enabling faster detection of electrons. This breakthrough has significant implications for the development of optoelectronic components such as nanoscale photodetectors and solar cells.
Researchers at Harvard-Smithsonian Center for Astrophysics have created an 'astro-comb' to help detect lighter planets around distant stars. The technique sharpens spectroscopy, enabling more accurate pinpointing of planet locations and opening possibilities for detecting more Earth-like planets.
Lisa Mauer, a Purdue University researcher, has developed an inexpensive and rapid method for detecting melamine in infant formula using infrared lasers and light spectroscopy. The technique can identify trace amounts of melamine at one part per million, significantly reducing the risk of contamination.
Researchers have proposed a novel optical clock concept that enables more stable clocks, sub-natural linewidth laser spectroscopy, and long coherence time lasers. The lasing behavior of the active optical clock is described by the modified Schawlow-Townes linewidth formula, which narrows the linewidth due to collective emission from ga...
A University of Pennsylvania team has successfully demonstrated a noninvasive optical device to monitor cerebral blood flow in acute stroke patients. The technology uses diffuse correlation spectroscopy to detect physiological changes, providing continuous bedside monitoring of brain blood flow and metabolism.
A new study shows that a sensitive laser instrument developed at the Idaho National Laboratory can detect minuscule traces of cells in Martian minerals. The technique uses a 'point-and-shoot' laser method to preserve more of the rock and reduce contamination risk, with high sensitivity crucial for NASA's search for life on Mars.
Researchers at CCNY have demonstrated the efficacy of Cytate as a fluorescence marker to detect prostate cancer. The contrast agent exhibited greater fluorescence when applied to cancerous tissue, with a peak ratio of 3.57 between cancerous and normal tissues.
Researchers at City College of New York (CCNY) have developed new near-infrared broadband lasers with tunability ranges around triple those of earlier crystals. The lasers can operate in two telecom windows, spanning 460 nanometers, and have potential applications in telecommunications, biomedical imaging, and remote sensing.
Researchers discovered a new technique to visualize the electronic structure of pigment-protein complexes, enabling better understanding of how plants transfer energy. This breakthrough could lead to designing future experiments to study individual energy relaxation pathways in photosynthesis.
Researchers at Harvard University have developed a new photonic device that uses an optical antenna to concentrate light and improve spatial resolution, leading to increased storage density in optical data storage platforms. The device could also be used in biology and engineering applications such as microscopy and spectroscopy.
Richard Zare receives $100,000 Wolf Prize for his ingenious applications of laser techniques in analytical chemistry. He has developed novel methods for detecting single molecules and exploring chemical properties.
A novel laser technique has been developed to identify and quantify toxic molecules, such as trichloroethylene, in the environment. The method enables quantitative studies of real-world surface processes without requiring ultrahigh vacuum conditions.
Scientists use Raman spectrometer to analyze minerals, gases and liquids on the sea floor, tracking carbon dioxide levels and distinguishing between gas and liquid forms. The device could potentially trap carbon dioxide in clathrate hydrates, a promising method for climate change mitigation.
The Optical Society of America honored its 2002 award winners, recognizing their significant contributions to various fields of optics. Notably, James P. Gordon received the Frederic Ives Medal for his seminal work on quantum electronics, while Emil Wolf was awarded the Esther Hoffman Beller Award for his influential educational work.
Researchers have discovered a new method for measuring the molecular properties of materials, allowing them to study nanostructures in unprecedented detail. The Gradient-Field-Raman (GFR) spectroscopy technique reveals unique vibration patterns that couldn't be explained by previous methods.
Researchers at the University of Illinois have developed a multidimensional technique that enhances vibrational spectroscopy, allowing for unprecedented detail in studying molecular vibrations. This new method enables femtosecond-resolved snapshots of molecular motions, providing insights into the fundamental mechanics of molecules.