Articles tagged with High Harmonic Generation
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.
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.
Scientists confirm decades-long prediction by measuring the color-changing effect of light in chiral carbon nanotubes. The material converts light at a rate two to three orders of magnitude greater than conventional materials.
Researchers have generated a 19.2-attosecond soft X-ray pulse, creating a camera capable of capturing elusive electron dynamics in unprecedented detail. This breakthrough enables direct observation of processes driving photovoltaics, catalysis, and emerging quantum devices.
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.
A research team at Yokohama National University developed a method to study titanium's electronic structure using high harmonic generation. They found that the orientation of electrons affects the material's strength, flexibility, and bonding behavior.
Researchers demonstrated the quantum optical properties of high-harmonic generation in semiconductors, aligning with theoretical predictions. The experiment showed entanglement and squeezing in the emitted light, which are key resources for many quantum technologies.
A new structure of light has been discovered that can accurately measure chirality in molecules, a property of asymmetry important in physics, chemistry, biology, and medicine. This 'chiral vortex' provides an accurate and robust form of measurement, allowing for the detection of chiral biomarkers.
The ELI ALPS facility provides state-of-the-art tools for studying ultrafast phenomena. The plasma and gas-based high-repetition-rate attosecond XUV beamlines at ELI ALPS enable researchers to advance multidisciplinary research in ultrafast phenomenon with enhanced signal-to-noise ratio.
Scientists have developed a novel universal light-based technique to control valley polarization in bulk materials, overcoming previous limitations. The discovery enables the manipulation of valley population without being restricted by specific material properties.
Scientists have made significant progress in understanding ultrafast electron dynamics by tracking the motion of electrons released from zinc oxide crystals using laser pulses. The research team combined photoemission electron microscopy and attosecond physics technology to achieve temporal accuracy, enabling them to study the interact...
Researchers at the University of Colorado Boulder have developed a new technique using doughnut-shaped beams of light to take detailed images of objects too tiny to view with traditional microscopes. This approach could help scientists improve nanoelectronics by inspecting semiconductors without damaging them.
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 have developed a method to generate mid-infrared pulses with dual-wavelength spectral shaping, enabling flexible tunability in both temporal and spectral domains. This allows for enhanced High-Harmonic generation (HHG) control, opening new possibilities for applications such as electron dynamics and light-matter interaction.
Researchers at TU Wien have created a new, simpler method for producing intense, high-energy X-ray pulses using ytterbium lasers and a gas medium. This technique increases the efficiency of X-ray radiation production, allowing for better monitoring of chemical reactions in real-time and more efficient nanostructure production.
Researchers use novel interferometric technique to measure time delay between H2 and D2 isotopes, finding phase shift of nearly 3 attoseconds caused by nuclear motion. The study uses high harmonic generation and advanced theoretical modeling to validate the method.
Researchers at Kyoto University have discovered a scaling law that determines high-order harmonic generation in the perovskite material Ca2RuO4. The phenomenon, which was first observed in atomic gas systems, has been found to be highly dependent on temperature and gap energy.
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.
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 from Germany, China, Israel and Vietnam cracked the code on attosecond collision dynamics in solids. By analyzing high harmonic generation (HHG) in solids, they unveiled the structure and dynamics of information encoded within the band structure.
Scientists confirmed that topological insulators produce a unique signature from their surface when exposed to circularly polarized laser light. This discovery was made possible by high harmonic generation, which enhances the signal coming from the surface and gives it a distinctive signature.
Engineered nanostructures overcome problems in gas-based high-harmonic generation, enabling scientists to observe molecular dynamics with a single laser shot. The record-breaking conversion efficiency covers a wide range of photon energies, opening up new opportunities for studying matter at ultrahigh fields.
Researchers at ETH Zurich have developed a high-repetition-rate laser source producing coherent soft x-rays spanning the entire 'water window', enabling new applications in chemistry and biology. The system, capable of 100 kHz repetition rates, demonstrates a significant improvement over existing sources.
Researchers have developed a new tabletop method to characterize ultrafast magnetic storage devices, which could lead to faster information processing technologies. The method uses high-harmonic generation of laser light in iron thin films to measure electron spin on a quadrillionth-of-a-second time scale.
Scientists at the Max Born Institute refined our understanding of strong-field processes like high harmonic generation and laser-induced electron diffraction. The study shows that returning electrons retain structural information on their initial molecular orbital, contradicting a commonly held assumption.
François Légaré, an INRS researcher, has been awarded the 2015 Herzberg Medal for his work in ultrafast molecular imaging. His research team made significant breakthroughs in dynamic imaging, capturing images of molecular reactions at unprecedented resolution.