Articles tagged with Laser Physics
The detection of high-frequency gravitational waves would offer insights into the early Universe's phases, inaccessible to electromagnetic wave investigations. Currently, technological challenges limit the sensitivity of proposed projects to six orders of magnitude lower.
Scientists have developed a new type of ultrafast laser oscillator that generates sub-50 fs pulses with broad spectral widths, exceeding the emission bandwidth of traditional gain media. The technique is pulse-energy and average-power scalable and applicable to other types of gain media.
A new collection of papers provides insights into laser-matter interactions, which can induce highly nonlinear properties in matter. Researchers are developing new ways to use these interactions for biomedical imaging, particle acceleration, and precise etching techniques.
A study led by Przemyslaw Nogly at PSI has detailed insight into the mechanism of a light-driven chloride pump in bacteria, revealing how light energy converts to kinetic energy and transports chloride ions inside cells. The pump uses two molecular gates to ensure one-way transport, with the process taking around 100 milliseconds.
Quantum entanglement is studied in attosecond laser laboratory experiments, where neutral hydrogen molecules are ionized using an attosecond pulse. The experiment reveals a competition between vibrational coherence and entanglement, demonstrating the breakdown of local realism.
Researchers at Washington State University have created a technique to observe matter wave caustics in atom lasers, resulting in curving cusps or folds. These findings have potential applications for highly precise measurement and timing devices, including interferometers and atomic clocks.
Researchers propose a method using optical cavities to enhance atom interferometers, enabling extreme momentum transfer for detecting dark matter and gravitational waves. This could facilitate breakthroughs in fundamental physics and future applications.
Femtosecond laser precision engineering enables micro/nano-structure creation with high resolution and dry processing. Key challenges include achieving small heat affected zones and ensuring sufficient processing speeds for industrial needs.
Researchers at Harvard have successfully observed quantum spin liquids, a previously unseen state of matter that has been elusive for nearly 50 years. By manipulating ultracold atoms in a programmable quantum simulator, the team was able to create and study this exotic state, which holds promise for advancing quantum technologies.
Scientists at Paderborn University have demonstrated the spatial confinement of a light wave to a point smaller than the wavelength in a topological photonic crystal. This finding enables novel unidirectional waveguides that transmit light without back reflection, even with arbitrarily large disorder.
A team led by Prof. Dr. Maria Hoflund developed a method to focus broadband XUV radiation with a high demagnification factor, enabling the creation of high-intensity XUV pulses with attosecond pulse duration.
Researchers have successfully created an experimental model of a skyrmion particle in a beam of light, providing a real system to demonstrate the behavior of this elusive type of fundamental particle. The study reveals the intricate structure and topological properties of skyrmions, which can be distorted but not broken.
A team of researchers has developed a simple and efficient method of quantum encryption using single photons, which can detect any attempt to hack the message. The breakthrough brings us closer to securing our data against quantum computers' potential attacks.
Researchers at Harvard SEAS developed a new silicon coating that counters chromatic dispersion in transparent materials like glass. The ultra-thin coating uses precisely designed silicon pillars to capture and re-emitting red light, allowing slower-moving blue light to catch up.
A team at Tampere University has created a metamaterial eENZ mirror that can control the correlation properties of light, switching between high and low correlation states. By manipulating polarization, they achieve near-perfect coherence switching.
Researchers at Chalmers University of Technology have developed a unique optical amplifier that offers high performance, is compact enough to integrate into a chip just millimeters in size, and does not generate excess noise. This breakthrough technology has the potential to revolutionize both space and fiber communication.
Researchers from DTU develop Fano laser, harnessing bound-state-in-the-continuum to improve coherence. This advancement enables ultrafast and low-noise nanolasers for high-speed computing and integrated photonics.
Researchers at the University of Bonn developed a method to visualize laser beams in a vacuum, allowing for precise alignment of individual atoms. This breakthrough enables faster and more accurate quantum optics experiments, potentially leading to advancements in computing and materials science.
Researchers at Tata Institute of Fundamental Research used extreme magnetic pulses to create large-scale spin patterns, potentially useful for terahertz frequency range electronic devices. The induced spin patterns are robust and stay 'arrested' for up to ten days.
Researchers have directly measured the interaction between an ultraviolet laser and a relativistic electron beam in a dipole magnet. The study shows that energy modulation of the electron beam can be effectively tailored, leading to precise bends in the pathway and improved FEL pulse properties.
Physicists at University of Gothenburg create modern version of classical experiment to directly visualize electron quantization. A single levitated droplet is used to demonstrate the minimum, indivisible amount of charge, making it visible with naked eye.
Laser physicists have built the first compact two-stage plasma-based accelerator, accelerating particles to near-light speed within a few millimeters. The hybrid plasma accelerator has shown more than three orders of magnitude higher acceleration fields than conventional accelerators.
An Australian-led team of physicists successfully created sloshing quantum liquids, revealing wavy motion and superfluid properties. The experiment provided insights into the speed of sound and potential effects on superfluidity, shedding light on a promising hybrid light-matter system for ultra-low-energy electronics.
A new design concept aims to increase laser peak power by compressing pulse duration instead of increasing energy, pushing the record to the Exawatt class. The design uses a two-beam pumped WNOPCPA and carefully optimized phase-matching to avoid pump interference.
A team of scientists and students from the University of Sheffield has published blueprints for a cheaper single-molecule microscope, making the technique more accessible to labs worldwide. The smfBox microscope is capable of single-molecule measurements and works as well as commercially available instruments.
The Center for Matter at Atomic Pressures (CMAP) will investigate the properties of matter under high pressures, shedding light on the formation and evolution of planets. The research aims to uncover novel properties of materials and their potential applications.
Researchers found that a fundamental principle of lasers, compensating for losses with amplified light, is only an approximation. A tiny excess loss due to luminescence inside the laser provides the key to understanding the spectral linewidth.
An international team of researchers used the proton radiography technique to visualize Weibel instabilities in a laser-driven plasma. They highlighted two variants of the instability and demonstrated precision imaging techniques that surpass other methods.
Physicists have measured electron flight times in a molecule to study the influence of the molecule on photoemission time. The measurements reveal a delay attributable to the molecular environment that becomes larger as the energy of the light pulses is reduced.
Researchers have developed a compact, room temperature, widely tunable terahertz laser that outperforms existing sources. The laser offers high power and wide tuning range in a robust design, unlocking new applications in science and technology.
Physicists at the University of Colorado Boulder have discovered a way to tie microscopic knots within liquid crystals, a type of material used in electronics. The researchers found that by applying voltage, they can expand or shrink the knots and even form complex shapes.
Researchers from MIPT and Ioffe Institute discover Weyl semimetals as ideal gain media for lasers, eliminating Auger recombination. This breakthrough could lead to more efficient lasers in the visible and infrared range, and even terahertz applications.
A new study reveals that charged particles can emit bright flashes of gamma rays by interacting with the quantum vacuum, challenging a long-held assumption about the nature of empty space. The researchers used high-powered lasers and strong magnetic fields to create conditions where Cherenkov emission could occur in vacuum.
Researchers have developed a technique to miniaturize plasma wakefield acceleration, allowing for the creation of compact, high-energy particle accelerators. This technology has the potential to revolutionize particle accelerator design and enable smaller, more accessible facilities.
Researchers have discovered chiral surface excitons, particles that spin like planets and annihilate each other on the surface of solids, emitting photoluminescence. The finding has potential applications for devices such as solar cells and electronic displays.
Physicists at Rice University have successfully cooled a neutral plasma using lasers, a technique that could lead to new insights into exotic states of matter and potentially even breakthroughs in quantum computing. The achievement sets the stage for simulators of super-dense stars like Jupiter and white dwarf stars.
Researchers from the University of Gothenburg have developed a new method to improve the use of optical tweezers, allowing for more accurate measurements with less data and faster processing. This breakthrough enables the technique to be used in pharmaceutical research and study systems that are not in equilibrium.
The University of Nebraska-Lincoln is a founding member of LaserNetUS, a national research network for high-intensity lasers. The network provides access to the country's most powerful lasers, enabling researchers to study extreme conditions and applications such as medicine and manufacturing.
A team of researchers at Technical University of Munich has developed a new method to measure the time between X-ray photon absorption and electron emission. The study reveals that photoelectrons can be generated in around 40 attoseconds, which is twice as fast as expected. This breakthrough could lead to advancements in photocathodes ...
Researchers aim to improve theoretical and numerical models of intense laser-particle interactions to analyze experiments probing quantum effects. The new research will also help understand exotic phenomena in strong magnetic fields found in astrophysical objects like magnetars.
Researchers have successfully written an electrical circuit into a crystal, enabling the creation of transparent and reconfigurable electronics. The phenomenon, called persistent photoconductivity, can be erased and reconfigured using heat and light, similar to an Etch A Sketch.
Physicists at Washington State University have created a fluid with negative mass, defying Newton's Second Law of Motion. By cooling rubidium atoms to absolute zero, they were able to create a state where the particles behave like waves and synchronize in unison, resulting in negative mass.
Victor Malka is a renowned researcher in laser plasma acceleration, who has demonstrated controlled quiver motion to produce intense and bright electron beams. His work has numerous applications in medicine, security, and imaging methods.
Researchers have demonstrated a new type of laser using bound states in the continuum, which can be more compact and energy-efficient. This technology has the potential to revolutionize telecommunications and computing applications.
Researchers discovered a material exhibiting macroscopic quantum effects, shedding light on the relationship between classical and quantum worlds. Topological insulators may hold the key to understanding this fundamental scientific riddle.
The journal aims to provide cutting-edge reviews and tutorials on plasma physics, benefiting graduate students and young researchers. Published exclusively online by Springer, it will cover various fields of plasma physics, including natural and laboratory plasmas.
A new laser-based uranium enrichment technology may provide a hard-to-detect pathway to nuclear weapons production. The separation of isotopes by laser excitation (SILEX) process could enable covert laser enrichment plants, posing proliferation concerns comparable to gas centrifuge development.
Researchers at Kansas State University have developed a new class of fiber-based lasers that can produce high-intensity light without requiring large amounts of power. The lasers use gas molecules to emit light and are portable, making them suitable for applications such as measuring distances and detecting gases in the atmosphere.
An international team of scientists including UMD physicists confirms Einstein's prediction of gravitational waves in a binary black hole merger event. This detection marks a major breakthrough in the field of gravitational wave research and offers insights into gravity and the universe.
Researchers at UTA have developed a new platform that uses ultrafast near-infrared lasers to deliver gene therapy to damaged areas of the retina, enabling vision restoration in patients with macular degeneration. The laser-based method has been shown to be more effective than traditional chemical gene delivery systems.
Researchers successfully mimic quantum entanglement using a laser pointer, doubling data speed in laser communication. The team demonstrated nonseparability of the laser beam's shape and polarization, enabling encoding of two bits of information.
The MAINZ Graduate School of Excellence has awarded Visiting Professorships to Dieter Jaksch, a renowned theoretical physicist, and Thierry Valet, a leading industry-based physicist in spintronics. The recipients will spend up to twelve months at the graduate school, sharing their expertise with doctoral candidates.
Researchers at ANU have developed a method to create laser-induced micro-explosions in silicon, resulting in the formation of two entirely new crystal arrangements and potentially four more. The new materials exhibit complex structures and altered electronic properties, including an altered band gap and superconductivity.
Researchers at Lawrence Livermore National Laboratory have created a record high number of positrons using lasers, which could help study gamma-ray bursts and extreme astrophysical processes. The team used three laser systems to produce nearly a trillion positrons, opening opportunities for antimatter research.
Researchers successfully demonstrate a new technique combining a solar telescope with a laser frequency comb to analyze distant stars with unprecedented accuracy, potentially leading to the discovery of Earth-like planets. The technique enhances spectral analysis and advances research in astrophysics.
Princeton engineers found that carefully restricting power delivery to certain areas within a laser can boost its output significantly. By targeting specific modes, they showed improvements in efficiency ranging from 100-fold to 10,000-fold, allowing for more control over frequency and spatial pattern of light emission.
Researchers created a reversible laser tractor beam that can repel and attract particles, moving them up to 20 centimeters with a single laser beam. The technique uses energy heating and polarization control to manipulate particles, offering new possibilities for atmospheric pollution control and tiny particle retrieval.
Brazilian physicists are taking advantage of increased funding to lead global research projects, including the Pierre Auger Observatory. However, they still face issues with science education and recognition, hindering their progress as a leading international community.
Researchers at the University of Otago have created a system that can precisely split minute clouds of ultracold atoms into 32 daughter clouds. The 'optical tweezers' unit uses intense laser beams to manipulate and control the atoms, enabling new tools for probing microscopic structures.
Researchers at the University of Adelaide have developed a new type of laser that can detect very low concentrations of gases in exhaled breath and the atmosphere. The laser's high power and efficiency make it suitable for detecting gases such as methane and ethane, which are important in global warming.