Articles tagged with Free Electron Phenomena
Scientists have created a compact device that enables ultra-narrow spectral linewidth of superradiant Smith-Purcell radiation, overcoming limitations in free electron accelerators. The device, called pump-induced stimulated S-SPR (PIS-SPR), uses a three-section system to pre-bunch electrons and emit radiation at a specific frequency.
SLAC researchers develop a laser-based shaping technique to compress billions of electrons into a length less than one micrometer, producing an electron beam with femtosecond-duration and petawatt peak power. This achievement opens up new discoveries in quantum chemistry, astrophysics, and material science.
Scientists have discovered a way to turn ordinary liquids into epsilon-near-zero (ENZ) materials by interacting them with intense femtosecond laser pulses. This creates a new class of materials with tunable light propagation properties, opening up possibilities for advances in optical sensing and communication.
Researchers at TU Wien have developed computer simulations to investigate the temporal development of quantum entanglement. They found that the 'birth time' of an electron flying away from an atom is related to the state of the remaining electron, demonstrating a quantum-physical superposition.
Researchers at MIT have directly observed edge states in a cloud of ultracold atoms, capturing images of atoms flowing along a boundary without resistance. This discovery could enable super-efficient energy transmission and data transfer in materials.
Researchers at Helmholtz-Zentrum Dresden-Rossendorf have developed a novel method to measure the structure of microbunched plasma-wakefield-accelerated electron beams using metal foil. This technique enables precise control over the electron bunches, leading to brighter and more stable light in free-electron lasers.
Researchers successfully observe and identify the reactive electron species for photocatalytic hydrogen evolution on metal-loaded oxides, shifting the paradigm on the traditionally believed role of metal cocatalysts. The electrons shallowly trapped in the in-gap states contribute to enhancing the hydrogen evolution rate.
Researchers at Ohio State University have made the first direct observation of incredibly small time delays in a molecule's electron activity when exposed to X-rays. This breakthrough reveals complex interactions between electrons and other particles, shedding light on intricate molecular dynamics.
Researchers from the Max Born Institute have developed a method to manipulate magnetism using circularly polarized XUV radiation, generating large magnetization changes without thermal effects. The study demonstrates an effective non-thermal approach to controlling magnetism on ultrafast time scales.
Researchers developed a 3D metamaterial capable of detecting polarization and direction of light, overcoming limitations of conventional optical devices. The breakthrough technology utilizes pi-shaped metal nanostructures with numerical aperture-detector polarimetry to analyze light distribution.
Researchers from EPFL have made significant strides in deciphering the electronic structure of water using computational methods that go beyond current approaches. The study accurately determines water's ionization potential, electron affinity, and band gap, essential for understanding its interactions with light and substances.
Researchers at EPFL and Max Planck Institute have successfully bridged the gap between light and electrons using a transmission electron microscope. They achieved this by generating dissipative Kerr solitons that interact with free electrons, allowing for ultrafast modulation of electron beams.
The study reveals ballistic transport of electrons in graphene, enabling fast speed and low energy consumption. By mapping the 'reflectance' of the sample with ultrafast lasers, researchers observed electrons moving ballistically in real time.
Scientists generate and control coherent polaron oscillations, enabling the manipulation of dynamic electric properties of polar liquids. The study demonstrates the importance of many-body interactions in polar molecular ensembles.
Scientists at University of Konstanz have developed a method to compress an electron beam into short pulses using femtosecond light flashes. The resulting electron pulses exhibit temporal superposition and can be used to study ultrafast phenomena in quantum mechanics, including the interaction between electrons and light.
Researchers at ETH Zurich discovered a new method to produce slow electrons through optical excitation, allowing for more efficient chemical reactions. The slow electrons, created by dissolving sodium in ammonia and exposing it to UV light, can be controlled and used to initiate reactions.
Researchers developed a new surface coating technology that significantly increases electron emission in materials, improving production of high-efficiency electron sources. This breakthrough is expected to enhance performances in electron microscopes and synchrotron radiation facilities.
A team of researchers at the Max Born Institute developed a novel method for X-ray Magnetic Circular Dichroism (XMCD) spectroscopy using a laser-driven plasma source. This breakthrough enables precise determination of magnetic moments in buried layers without damaging samples, and can monitor ultrafast magnetization processes.
Scientists successfully observe and quantify a two-dimensional electron gas at the semiconductor interface, enabling control of its performance. This breakthrough leads to the development of high-performance high-frequency/power devices with improved interface analysis and control.
Researchers at the University of Strathclyde have simulated ice-cold electron beams that can produce powerful coherent photon pulses with pulse durations in the attosecond regime. The breakthrough could lead to the development of ultra-compact X-ray lasers, reducing their size from kilometres to just tens of metres.
Scientists at Rice University, Stanford University, and UT Austin have developed a mechanism to generate solvated electrons through plasmon resonance, making it easier to turn light into these clean, zero-byproduct chemicals. This breakthrough could lead to new ways of driving chemical reactions and reducing greenhouse gas emissions.
The study, published in Physical Review X, demonstrates the quantum properties of 2D Cherenkov radiation and reveals a record-breaking electron-radiation coupling strength. Every electron emitted radiation, improving the interaction efficiency by over two orders of magnitude.
Researchers at The University of Hong Kong and MIT have developed a new method to produce stronger interactions between photons and electrons, enabling hundredfold increases in light emission. This breakthrough has potential ramifications for commercial applications and fundamental scientific research.
Scientists have developed a new method to enhance electron-photon coupling, resulting in a hundredfold increase in light emissions. The approach uses a specially designed photonic crystal to produce stronger interactions between photons and electrons.
Researchers from City University of Hong Kong developed a novel device-engineering strategy to suppress energy conversion loss in organic photovoltaics, achieving PCE over 19%. The discovery enables OPVs to maximize photocurrent and overcome the limit of maximum achievable efficiency.
A team of researchers from Synchrotron SOLEIL, France, and Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Germany, has successfully demonstrated a free-electron laser driven by plasma acceleration and seeded by additional light pulses. This achievement could lead to the development of more compact and affordable FEL systems.
Researchers have developed a hybrid plasma accelerator that combines two methods for electron acceleration, achieving better stability and higher particle density than single-accelerator systems. This innovation opens up new possibilities for precision X-ray generation and novel applications in fields like medical imaging and ultrafast...
Researchers have solved the fundamental problem of scattering in a quantum system of three charged particles, a phenomenon responsible for ionization in atomic physics. They employed exterior complex scaling to obtain accurate solutions using supercomputers, enabling detailed calculations for outgoing states and interactions.
The research team observed and recorded the relativistic motion of free electrons in electromagnetic fields, which confirms several predictions based on Einstein's theory of relativity. The discovery challenges a fundamental assumption about the Thomson cross section, a physical constant used in physics theories.
University of Michigan scientists measure how matter changes under extreme pressure using a high-resolution femtosecond laser. The experiment confirms earlier predictions about atom behavior in super-dense environments, providing insight into phase transitions and electron conductivity.