Articles tagged with Laser Physics
Researchers at TU Wien and University of California San Diego have discovered a new quantum regime of coherent X-ray generation with higher energies, breaking the conventional energy cutoff limit. The effect is attributed to the interaction between two electrons in helium atoms, which release their energy simultaneously.
Physicists at TU Dortmund University demonstrate non-local synchronization of electron-nuclear spin oscillations, opening routes to controllable spin networks. Many time crystals can form in the same material and synchronize their oscillations, even at distances exceeding one thousand times the size of an individual oscillator.
Researchers at DTU Electro have developed a method to double the usable wavelength range of ultra-low-noise supercontinuum lasers in a single fiber. This breakthrough enables stable broadband light with exceptionally low noise, benefiting medical imaging, gas sensing, and spectroscopy. The new source spans from 0.86 to 2.90 micrometers...
Scientists have developed a table-top technique using all-attosecond transient absorption spectroscopy to study the oscillatory motion of an electron vacancy in xenon ions. The results provide insights into the underlying dynamics of light-induced processes.
Exceptional points in non-linear systems follow a universal geometric order, according to a new study published in Nature Communications. The findings have implications for the design of highly sensitive sensors and could lead to a deeper understanding of non-Hermitian Physics.
Researchers at the University of Michigan have created a device that enables control of electron flow using laser light, potentially leading to advancements in sensing, imaging, and telecommunications. The phenomenon relies on quantum interference, allowing for directional control of electrons.
Researchers at Texas A&M University have developed a technique that maps chemical changes directly, using natural molecular vibrations. This allows for the observation of biological processes in real-time, giving researchers a more complete picture of how diseases emerge and evolve.
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 observe a fully coherent quantum dance between light-induced electronic excitations and crystal lattice vibrations in perovskite nanocrystals. The interaction between excitons and phonons is found to remain well-defined at low temperatures, enabling the evolution of quantum coherence for up to 10 picoseconds.
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.
Researchers at Colorado State University have measured a hydrogen proton's radius to be 0.84 femtometers, resolving the long-standing scientific discrepancy that has puzzled scientists for years. The finding confirms the Standard Model theory and opens a door for further study, revealing subtle issues in earlier measurements.
Researchers at the University of Rochester developed a solar-thermal desalination process that produces fresh water in an energy-efficient way, eliminating brine and requiring no chemical additives. The technology extracts nearly 100% of salts in solid form, producing table salt and precious minerals like lithium.
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.
Researchers have developed a new procedure to speed up elaborate computer simulations analyzing matter under extreme conditions. The method, which uses mathematical transformation into imaginary time, enables faster evaluation of X-ray scattering experiments, improving fields like fusion research and laboratory astrophysics.
Researchers at University of Witwatersrand and University of East Anglia have discovered a way to control light by exploiting its natural geometry. Light can develop chiral behavior, meaning it acts like left or right hand, while traveling freely through space, without mirrors or special materials.
A team of international researchers observes and controls how angular momentum is transferred and conserved within a crystal lattice using terahertz laser pulses. The experiment reveals a surprising effect: during the angular momentum transfer, the direction of rotation reverses due to the rotational symmetry of the material.
Patrizio Antici, a specialist in applied photonics, has been awarded the prestigious Friedrich Wilhelm Bessel Award for his cutting-edge research in laser and plasma physics. The award highlights his impact on energy and materials sciences, reflecting a collective effort grounded in scientific excellence and collaboration.
Researchers have developed a unified mathematical model explaining two types of 'breathing' solitons in ultrafast lasers, overcoming decades-old puzzle. The new framework accurately predicts complex behaviors and reveals underlying mechanisms.
A new laser method allows researchers to study radioactive elements like neptunium and fermium, which have rugby ball-shaped atomic nuclei. The technique provides crucial information about the size and shape of atomic nuclei, essential for understanding actinide properties.
Scientists at Chiba University developed a simple method to generate high-quality optical bottle beams that remain concentrated over long distances. The technique uses a binary axicon and a flat multilevel diffractive lens to create sharp light structures.
A new laser source generates a specific type of light source called a frequency comb in the mid-infrared region, paving the way for miniaturization. The device overcomes engineering challenges to produce bright, stable, and compact frequency combs.
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.
Researchers from the University of Warsaw and other institutions created optical tornadoes by combining spatially variable birefringence with an optical microcavity. This allows for the creation of miniature light sources with complex structures, potentially enabling simpler and more scalable photonic devices.
Engineers at Harvard create microcombs on photonic chips, enabling compact, programmable frequency combs for precision measurement and telecommunications applications. The breakthrough makes electro-optic microcombs more practical, energy efficient, and diverse.
A team from Tokyo Metropolitan University successfully detects laser-assisted electron scattering using circularly polarized light, shedding light on atomic scale helicity and its impact on electron-matter interaction. The signal agrees with theory, but further work is needed to improve detection efficiency and accuracy.
Attosecond pulses rely on ultrafast lasers, which face performance bottlenecks in pulse energy, duration, wavelength, and repetition rate. Key technological routes include increasing pulse energy and peak power through amplification architectures and combining strategies.
This study reveals that a femtosecond laser can induce a rise in electronic temperature, transiently blocking optical absorption and enabling multicolor modulation from a single material platform. The discovery opens a new pathway toward ultrafast, broadband, and energy-efficient photonic devices.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have discovered a new way to generate ultra-precise, evenly spaced laser light combs on a photonic chip. This breakthrough could miniaturize optical platforms like spectroscopic sensors or communication systems.
By changing the physical structure of gold, researchers can drastically change its interaction with light, leading to enhanced electronic behavior and improved absorption of light energy. This study demonstrates the potential of nanoporous gold as a new design parameter for engineering materials in advanced technologies.
Scientists at SwissFEL have developed a technique known as X-ray four-wave mixing, allowing them to access coherences in matter for the first time. This breakthrough has the potential to illuminate how quantum information is stored and lost, ultimately aiding the design of more error-tolerant quantum devices.
Researchers at the Paul Scherrer Institute have successfully implemented mode-locking to generate coherent trains of X-ray pulses with unprecedented temporal structure. This achievement enables attosecond science and opens up new experimental possibilities, including precise timing of phenomena in gases, liquids, and solids.
Researchers at Lund University have developed a compact and elegant way to stretch ultrafast laser pulses using a diffraction grating, allowing for precise control over pulse duration. This enables full characterization in a single shot, without the need for pre-compensation optical elements.
Researchers have demonstrated how controlling the structure of photons in space and time enables tailored quantum states for next-generation communication, sensing, and imaging. This breakthrough offers new pathways for high-capacity quantum communication and advanced technologies.
Researchers have demonstrated that non-circular VCSEL cavity designs can fundamentally improve performance by redefining boundary conditions. The pentagonal VCSEL showed over twice the power density of traditional circular VCSELs, while the mushroom-shaped VCSEL offered high power and low spatial coherence.
A new study uses X-ray microcomputed tomography to image and analyze 3D chaotic microcavities without harming them. The team found that distorted shapes lead to Arnold diffusion, confirming a long-standing theoretical prediction about 3D chaotic light dynamics.
Researchers have developed a new system that combines laser amplification and bandwidth, achieving 80% efficiency in a compact and versatile design. The system uses a multipass procedure to synchronize pulses and generate pulses shorter than 50 femtoseconds.
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.
Scientists at Max Born Institute and DESY develop a plasma lens that focuses attosecond pulses, improving the study of ultrafast electron dynamics. The technique offers high transmission rates and allows for focusing light across different colors.
Physicists at Umeå University developed a laser made entirely from biomaterials, including birch leaves and peanut kernels. The environmentally friendly laser performs just as well as artificially engineered lasers and could be used for bioimaging, diagnostics, and optical tagging.
Researchers developed a laser-emission vibrational microscopy technique for rapid screening of hyperlipidemia, measuring viscosity of microdroplets in over 5,400 droplets in 90 minutes. The approach enables high-throughput analysis of biological fluids with promise for mechanical biomarker discovery and low-cost clinical diagnostics.
Researchers developed a novel fluorotellurite glass, TBAY, with high nonlinear efficiency, allowing for miniaturization of mid-infrared laser systems. The new fiber generated tunable Raman soliton and dispersive waves beyond 4 μm in centimeter-long lengths.
Researchers developed a strong-field laser passivation strategy to create super-corrosion-resistant stainless steels. The technique forms a hybrid Fe3O4/Fe2O3/Cr2O3 passivation layer with unique micro/nanostructures, greatly suppressing pitting corrosion and inhibiting metal surface exposure.
Researchers developed luminescent ceramic-converted laser diodes with superior thermal stability, high-power endurance, and improved luminescence efficiency. The resultant ceramics achieve unprecedented efficiency and enable record output power under blue laser excitation.
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.
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.
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 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.
Researchers developed a novel robust saturable absorber by integrating a nanocavity heterostructure onto the fibre end facet, achieving single-pulse generation in approximately 85% of configurations. This enhances environmental tolerance and compactness for communication systems, high-precision sensing, and bio-photonics.
A team of scientists observed the earliest steps of ultrafast charge transfer in a complex dye molecule, with high-frequency vibrations playing a central role. The experiments showed that these vibrations initiate charge transport, while processes in the surrounding solvent begin only at a later stage.
Researchers at Umea University have demonstrated a custom-built laser facility generating ultrashort laser pulses with extreme peak power and precisely controlled waveforms. The Light Wave Synthesizer 100 (LWS100) spans 11 meters in length, capable of producing 100 terawatts for a few millionth of a billionth of a second.
A team of researchers developed a reliable method to create donut-like, topologically rich spin textures called skyrmion bags in thin ferromagnetic films. The success rate of generating such textures using single laser pulses is significantly higher than magnetic-field-driven approaches.
Researchers at Macquarie University developed a new technique to narrow laser linewidth by factors exceeding 10,000 using diamond crystals and Raman scattering. This breakthrough could revolutionize quantum computing, atomic clocks, and gravitational wave detection with improved spectral purity.
The researchers created a novel method for using cholesteric liquid crystals in optical microcavities, enabling the formation and dynamic tuning of photonic crystals. This breakthrough research has the potential to revolutionize photonic engineering by opening up new perspectives in the manipulation of light.
Researchers have developed a novel single-shot diagnostic technique called RAVEN, allowing for the complete capture of ultra-intense laser pulses in real-time. This method enables scientists to fine-tune laser systems and bridge the gap between experimental reality and theoretical models.
Fraunhofer Institute for Applied Solid State Physics has developed a semi-automated process for producing quantum cascade laser modules with MOEMS and EC, simplifying production and reducing costs. The technology enables spectral tunability and high brilliance, making it suitable for various spectroscopy applications.
Dr. Jonas Ohland will lead the ALADIN project to develop stable, efficient lasers for inertial confinement fusion. The goal is to improve beam guidance and reduce manual intervention, benefiting not only fusion research but also other high-power laser applications.
Researchers at U of A create a transistor that operates at speeds over 1,000 times faster than modern computer chips. The breakthrough uses quantum effects to manipulate electrons in graphene, enabling ultrafast processing for applications in space research, chemistry, and healthcare.
Researchers at Ateneo de Manila University create hydrophobic surfaces using electrospun polymer fibers to hold water droplets in a dome shape, allowing for dynamic adjustment of magnifying power. This discovery has potential practical applications in science classrooms, remote areas, and research labs.
Researchers demonstrate ultrafast transparency switching across multiple wavelengths using single laser excitation in germanium, opening possibilities for advanced optical technologies. The study highlights the potential of Ge as a key material for ultrafast optical switching with promising applications in high-speed data transmission ...
Harvard physicists develop an optical vortex beam that twists and changes shape, resembling spiral shapes found in nature. The 'optical rotatum' has potential applications in controlling small particles and micro-manipulation, and its creation is made possible with a single liquid crystal display.