Articles tagged with Laser Physics
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.
Researchers successfully created artificial magnets using quantum matter waves of Rubidium atoms. The team's innovative method mimics the behavior of traditional magnets, allowing for clearer understanding and potential applications in fields like data storage and medical instrumentation.
Researchers from UC Berkeley report first direct measurement of gravity's effect on antimatter, specifically antihydrogen in free fall. The study suggests that antimatter does not exhibit anti-gravity and falls at the same rate as normal matter.
Researchers at the University of York and Joint Institute for High Temperatures used a petawatt laser to remove deeply bound electrons from atoms, creating a distinctive plasma state. The experiment aims to further understanding of fusion energy generation, which employs hotter plasmas than the Sun.
Researchers demonstrate acceleration of electrons by a laser in free space, a significant breakthrough with implications for fusion as a new energy source. The capture-acceleration scenario, proposed by Yu-kun Ho's group, explains how a tightly focused laser can create a channel for electrons to receive energy gain.
By using high-powered X-ray laser, researchers stripped a record 36 electrons from a xenon atom, achieving a previously unachievable positively charged state. This breakthrough will help create new states of matter and produce higher-quality images of nano-world objects.
The BELLA laser system has delivered a petawatt of power in a pulse just 40 femtoseconds long at a pulse rate of one hertz, a world record for laser performance. This achievement enables the creation of compact particle accelerators and tabletop free electron lasers for investigating materials and biological systems.
A research team at CU-Boulder has generated laser-like beams of X-rays from a tabletop device, enabling super-high-resolution imaging and providing insights into the nanoworld. The breakthrough device uses atoms in a gas to efficiently combine low-energy photons, generating high-energy X-ray photons.
Researchers at KIT have successfully manufactured a pentamode metamaterial, also known as a metafluid, which exhibits unique mechanical properties. The material's behavior is determined by varying parameters, allowing it to mimic the properties of water and other substances.
The new method uses optical pumping and magnetic barriers to extract desired atoms from a stream of elements, allowing for the isolation of crucial isotopes like lithium-7. This approach promises to be a more efficient and safer means of obtaining these vital elements for medical applications.
Researchers from NIST and UVA successfully demonstrated the use of electron tweezers to move, position and assemble tiny particles at the nanoscale. Electron tweezers have the potential to offer a thousand-fold improvement in sensitivity and resolution compared to traditional laser optical tweezers.
Research suggests that physics principles may be used to create complex crop-circle patterns, with some teams reproducing damage using handheld magnetrons and microwaves. Crop-circle artists are believed to use invisible construction lines to design their work, dispelling the need for traditional tools.
Physicists at NIST have demonstrated a super-stable laser operating in a minivan, showing its potential for field use in geodesy, hydrology and space-based physics experiments. The laser was tested with the vehicle stationary and moving at speeds of less than 1 meter per second, remaining stable enough for some applications.
Scientists have successfully created an optical analogue of Hawking radiation using a laser beam and glass target. This experiment confirms the theoretical predictions of Hawking radiation, which is emitted by black holes but difficult to detect.
University of Oregon physicists have developed a technique to slow down mechanical fluctuations in optomechanical oscillators, reducing phonon excitations to near 40 quanta. The goal is to reach the quantum mechanical ground state with minimal excitation, enabling precise nanotechnology measurements.
Researchers create Saser, a sonic equivalent to lasers producing ultra-high frequency sound waves on a nano scale. The new device has potential applications in computing, imaging, and anti-terrorist security screening.
The K-State Macdonald Lab is shifting its focus to ultrafast laser science, exploring its potential for molecular engineering, healthcare and energy innovations. Researchers are working to develop optimal laser characteristics to control reactions within molecules.
Researchers developed a new set of non-linear equations that fit both conventional and non-conventional lasers, predicting important properties from simple inputs. This unifying theory solves the long-standing problem in laser physics, providing a substantially broader perspective on laser structures.
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 developed a new method to observe weak interactions in nanoscale systems using high-powered lasers and quantum dots. The technique allows for the detection of the Fano effect, enabling scientists to explore new frontiers in quantum optics.
Researchers have developed a new technique to detect malaria infection in human blood using lasers and non-linear optical effects, eliminating the need for slides and microscopes. The technique holds promise for simpler, faster, and labor-intensive detection of the malaria parasite.
The Rutgers-Camden team has identified conditions that ensure thorough polymer coating and compiled new data on the effects of wavelengths on specific properties. The research aims to improve the coating of polymers in smoothness and uniformity, crucial for biomedical devices like pacemakers and artificial joint replacements.
Researchers used laser tweezers to measure the forces exerted by a virus's motor as it pushes DNA into its capsid. The study found that positively charged ions play a critical role in overcoming electrostatic repulsion, allowing the virus to inject genetic material into bacterial cells.
Researchers at UT Austin capture as few as sixty atoms in a laser trap, achieving repeated measurements of quantum atom statistics. The study creates a new field and places scientists one step closer to realizing quantum computing by controlling individual atoms.
Researchers have created a novel Raman laser that combines the pump source and material into a single device, enhancing efficiency by 30% and reducing size. The 'matryoshka' design enables tuning of the pump laser radiation to strong electronic resonance in the material, boosting gain by five orders of magnitude.
The US Navy has successfully upgraded its free electron laser to a record-breaking 10 kW power level, enabling new possibilities in manufacturing, medical research, biology, and basic physics. The upgrade marks a significant milestone in the FEL program's development and opens doors to various applications.
Researchers at UCLA created a 30-cm diameter plasma laser by applying a nonuniform magnetic field. Meanwhile, scientists have made rapid advances in detecting dark matter using weak gravitational lensing experiments. A paper also examines the emerging behavior of complex systems in electronic bidding on online auction sites like eBay.
Marlan Scully's new engine design uses a quantum heat bath to produce power, driving a piston with less wasted energy than in the Carnot model. The engine employs lasers, mirrors, and quantum coherence to capture energy from exhaust gases, improving efficiency.
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 at Texas A&M University have devised a method to stop light, utilizing the EIT phenomenon to slow down photons in a gas cell. This breakthrough could enable new applications for quantum computing and modern nonlinear optics.
Researchers at University of Rochester's Laboratory for Laser Energetics successfully completed the first full-scale test of polarization smoothing on the world's most powerful laser, Omega. The technique generated 70% more fusion neutrons than without and moves closer to self-sustaining fusion.