Current Attosecond News and Events

Current Attosecond News and Events, Attosecond News Articles.
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White turns into (extreme-)ultraviolet
Researchers from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) have developed a new method to modify the spectral width of extreme-ultraviolet (XUV) light. By employing a novel phase-matching scheme in four-wave mixing, they could compress the spectral width of the initial broadband light by more than hundred times. The detailed experimental and theoretical results have been published in Nature Photonics. (2021-01-25)

Clocking electron movements inside an atom
Hard X-ray free-electron lasers (XFELs) have delivered intense, ultrashort X-ray pulses for over a decade. One of the most promising applications of XFELs is in biology, where researchers can capture images down to the atomic scale even before the radiation damage destroys the sample. In physics and chemistry, these X-rays can also shed light on the fastest processes occurring in nature with a shutter speed lasting only one femtosecond - equivalent to a millionth of a billionth of a second. (2021-01-19)

Attosecond interferometry in time-energy domain
Analogous to the conventional spatial double-slit experiment, the time domain Young's experiment can be realized by using temporal slits for diffraction instead, and fringes in the energy domain are expected. As a time-energy domain interferometric device, the temporal Young's interferometer is anticipated to possess advantageous time resolving capability and holds the promise of tracking ultrafast processes. Scientists from China developed an all-optical attosecond few-slit interferometer and demonstrated its applications in time-energy domain high precision measurement (2020-11-24)

Attosecond boost for electron microscopy
A team of physicists from the University of Konstanz and Ludwig-Maximilians-Universität München in Germany have achieved attosecond time resolution in a transmission electron microscope by combining it with a continuous-wave laser -- new insights into light-matter interactions. (2020-11-11)

uOttawa researchers find cheaper, faster way to measure the electric field of light
Researchers at the University of Ottawa have created a new method to measure the temporal evolution of electric fields with optical frequencies. The new approach, which works in ambient air, facilitates the direct measurement of the field waveform and could lead to breakthroughs in high-speed electronics. (2020-10-16)

Electron movements in liquid measured in super-slow motion
Electrons are able to move within molecules, for example when they are excited from outside or in the course of a chemical reaction. For the first time, scientists have now succeeded in studying the first few dozen attoseconds of this electron movement in a liquid. (2020-08-21)

UCF researchers generate attosecond light from industrial laser
University of Central Florida researchers are making the cutting-edge field of attosecond science more accessible to researchers from all disciplines. Their method to help open up the field is detailed in a new study published today in the journal Science Advances. (2020-08-21)

New compressor delivers above-terawatt 1.5-cycle pulses at kilohertz repetition rate
Researchers at the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) have reached a new milestone in few-cycle pulse generation, breaking a 10-year-old record and achieving 1.5-optical-cycle-long laser pulses with 1.2 terawatt peak power by a new high-energy hollow fiber compressor beamline. The intense pulses will be used to generate intense attosecond harmonic radiation for nonlinear XUV spectroscopy studies. (2020-06-23)

Attosecond physics: Quantum brakes in molecules
Physicists have measured the flight times of electrons emitted from a specific atom in a molecule upon excitation with laser light. This has enabled them to measure the influence of the molecule itself on the kinetics of emission. (2020-05-20)

X-ray vision through the water window
Physicists at ETH Zurich have developed the first high-repetition-rate laser source that produces coherent soft x-rays spanning the entire 'water window'. That technological breakthrough should enable a broad range of studies in the biological, chemical and material sciences as well as in physics. (2020-04-08)

Tiny double accelerator recycles energy
A team of DESY scientists has built a miniature double particle accelerator that can recycle some of the laser energy fed into the system to boost the energy of the accelerated electrons a second time. The device uses terahertz radiation, and a single accelerating tube is just 1.5 centimetres long and 0.79 millimetres in diameter. Dongfang Zhang and his colleagues present their experimental accelerator in the journal Physical Review X. (2020-03-20)

Photons and electrons one on one
The dynamics of electrons changes ever so slightly on each interaction with a photon. Physicists at ETH Zurich have now measured such interplay in its arguably purest form -- by recording the attosecond-scale time delays associated with one-photon transitions in an unbound electron. (2020-03-20)

Electrons in rapid motion
Researchers observe quantum interferences in real-time using a new extreme ultra-violet light spectroscopy technique. (2020-02-14)

Shaping waveforms
Researchers have succeeded for the first time in temporally shaping the electric field of an attosecond pulse. (2020-02-13)

An ultrafast microscope for the quantum world
Processes taking place inside tiny electronic components or in molecules can now be filmed at a resolution of a few hundred attoseconds and down to the individual atom. (2020-01-29)

Scientists invent a new method of generating intense short UV vortices
An international group of scientists, including Skoltech Professor Sergey Rykovanov, has found a way to generate intense 'twisted' pulses. The vortices discovered by the scientists will help investigate new materials. The results of their study were published in the prestigious journal, Nature Communications. (2020-01-23)

Laserphysics: At the pulse of a light wave
Physicists in the Laboratory for Attosecond Physics at Ludwig-Maximilians-Universitaet (LMU) in Munich and at the Max Planck Institute for Quantum Optics (MPQ) have developed a novel type of detector that enables the oscillation profile of light waves to be precisely determined. (2020-01-10)

Attosecond control of an atomic electron cloud
Researchers at SAGA Light Source, the University of Toyama, Hiroshima University and the Institute for Molecular Science have demonstrated a method to control the shape and orientation of an electron cloud in an atom by tuning the attosecond spacing in a double pulse of synchrotron radiation. (2020-01-07)

Spectroscopy: A fine sense for molecules
Scientists at the Laboratory for Attosecond Physics have developed a unique laser technology for the analysis of the molecular composition of biological samples. It is capable of detecting minimal variations in the chemical make up of organic systems. (2020-01-01)

Electronics at the speed of light
A European team of researchers including physicists from the University of Konstanz has found a way of transporting electrons at times below the femtosecond range by manipulating them with light. This could have major implications for the future of data processing and computing. (2019-12-23)

A momentous view on the birth of photoelectrons
The creation of photoelectrons through ionisation is one of the most fundamental processes in the interaction between light and matter. Yet, deep questions remain about just how photons transfer their linear momentum to electrons. With the first sub-femtosecond study of the linear photon momentum transfer during an ionisation process, physicists at ETH Zurich provide now unprecedented insight into the birth of photoelectrons. (2019-12-05)

SLAC scientists invent a way to see attosecond electron motions with an X-ray laser
Researchers at the Department of Energy's SLAC National Accelerator Laboratory have invented a way to observe the movements of electrons with powerful X-ray laser bursts just 280 attoseconds, or billionths of a billionth of a second, long. (2019-12-02)

Few-cycle pulses break the 300 W barrier
A team led by researchers from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI), Laser-Laboratorium Goettingen (LLG) and Active Fiber Systems (AFS) has generated multi-millijoule 3-cycle pulses at 318 W average power level. These results mark a significant milestone in few-cycle laser technology paving the way towards industrial applications. The report appeared in Optica as a Memorandum. (2019-11-13)

A milestone in ultrashort-pulse laser oscillators
With the demonstration of a sub-picosecond thin-disk laser oscillator delivering a record-high 350-W average output power, physicists at ETH Zurich set a new benchmark and pave the path towards even more powerful lasers. (2019-11-12)

The hidden ability of synchrotron radiation to perform coherent control
Researchers have discovered that synchrotron radiation from relativistic electrons has a hitherto unremarked ability to manipulate populations and pathways in matters. There is no technical restriction on the application of this brand-new coherent-control concept at shorter wavelengths as far as the hard x-ray range. (2019-11-07)

Physics: An ultrafast glimpse of the photochemistry of the atmosphere
Researchers at Ludwig-Maximilians-Universitaet (LMU) in Munich have explored the initial consequences of the interaction of light with molecules on the surface of nanoscopic aerosols. (2019-10-11)

A metronome for quantum particles
Physicists in Vienna have found a way to measure the elusive quantum phase of electrons. This enables a new, better view of important phenomena used in photosensors or photovoltaics. (2019-10-01)

Intriguing discovery provides new insights into photoelectric effect
The discovery that free electrons can move asymmetrically provides a deeper understanding of one of the basic processes in physics: the photoelectric effect. It was first described by Albert Einstein and explains how high frequency light releases electrons from a material. The results have been published in Physical Review Letters. (2019-10-01)

Study on attosecond timescale casts new light on electron dynamics in transition metals
A team of scientists from the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg and the Department of Physics at ETH Zurich in Switzerland, together with the Center for Computational Sciences of University of Tsukuba, has unraveled the light-induced electron-localization dynamics in transition metals at the attosecond timescale. The team investigated for the first time the many-body electron dynamics in transition metals before thermalization sets in. Their work has now appeared in Nature Physics. (2019-08-06)

What happens when you explode a chemical bond?
Light-induced breakage of chemical bonds can lead to damage in the body and environment, but techniques for studying this photochemical reaction have been limited to before and after snapshots. With attosecond lasers and a technique to probe the energy states of photoexcited molecules, UC Berkeley chemists have made a movie of the process preceding breakup. The technique will help study biological molecules that absorb light without breaking bonds, such as rhodopsin in the retina. (2019-07-11)

Experimental physicists redefine ultrafast, coherent magnetism
For the first time ever, experimental physicists have been able to influence the magnetic moment of materials in sync with their electronic properties. The coupled optical and magnetic excitation within one femtosecond corresponds to an acceleration by a factor of 200 and is the fastest magnetic phenomenon that has ever been observed. (2019-06-26)

Twisting whirlpools of electrons
Using a novel approach, EPFL physicists have been able to create ultrafast electron vortex beams, with significant implications for fundamental physics, quantum computing, future data-storage and even certain medical treatments. (2019-05-06)

New holographic technique opens the way for quantum computation
EPFL physicists have developed a method based on the principles of holograms to capture 3D images of objects beyond the reach of light. (2019-05-03)

Laser physics: Downsizing the particle accelerator
Munich physicists have succeeded in demonstrating plasma wakefield acceleration of subatomic particles in a miniaturized, laser-driven model. The new system provides a broader basis for the development of the next generation of particle accelerators. (2019-03-27)

Laser physics -- Attosecond photoelectron spectroscopy accelerated
Laser physicists have succeeded in reducing the acquisition time for data required for reliable characterization of multidimensional electron motions by a factor of 1000. (2019-02-05)

How molecules teeter in a laser field
When molecules interact with the oscillating field of a laser, an instantaneous, time-dependent dipole is induced. This very general effect underlies diverse physical phenomena. Now scientists from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) report on an experiment in the Journal of Physical Chemistry Letters, where the dependence of the driven-dipole response on the bound state of an electron in a methyl iodine molecule is revealed. (2019-01-17)

Physicists edge closer to controlling chemical reactions
A team of researchers has developed an algorithm for predicting the effect of an external electromagnetic field on the state of complex molecules. The new algorithm, presented in a paper in The Journal of Chemical Physics, enables researchers to look inside large polyatomic molecules, observe and potentially control electron motion therein. (2018-12-10)

Atomic jet -- the first lens for extreme-ultraviolet light developed
Scientists from the Max Born Institute have developed the first refractive lens that focuses extreme ultraviolet beams. Instead of using a glass lens, which is non-transparent in the extreme-ultraviolet region, the researchers have demonstrated a lens that is formed by a jet of atoms. The results, which provide novel opportunities for the imaging of biological samples on the shortest timescales, were published in Nature. (2018-11-28)

Attosecond pulse leads to highest molecular level probe resolution
Devising a source of ultra-fast X-ray pulsating in the attosecond range is no mean feat. It enables physicists to probe dynamic processes in matter with unprecedented time resolution. Now, a team of physicists from China has exploited an optical phenomenon, opening the door to creating high-order oscillations in existing light sources and a beam source pulsating in an ultra-fast manner to reach the attosecond range. (2018-10-01)

Team of researchers determines absolute duration of photoelectric effect for the first time
It provides the basis for solar energy and global communications: the photoelectric effect. Albert Einstein described it over a century ago. For the first time, scientists from the Technical University of Munich (TUM), the Max-Planck Institute of Quantum Optics (MPQ), and the TU Wien have now measured the absolute duration of the light absorption and of the resulting photoelectron which is released from a solid body. (2018-09-19)

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