Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Controlling ultrafast electrons in motion

24.02.2016

The fully coherent free electron laser FERMI paves the way to control ultrafast electron motion

An international team has used the light produced by the Free Electron Laser FERMI at the research Centre Elettra Sincrotrone Trieste in the AREA Science Park to control the ultrafast movement of electrons. The experiment, published in the journal Nature Photonics, opens the way to the study of more complex processes which occur in nature on the scale of attoseconds (billionths of a billionth of a second), such as photosynthesis, combustion, catalysis and atmospheric chemistry.


Scheme of the experiment: pulses of light (waves) emit electrons (green) from a neon atom (violet).

Image courtesy of Maurizio Contran, Department of Physics, Politecnico di Milano.

Chemical, physical and biological processes are intrinsically dynamic, because they depend not only on the atomic and electronic structure of matter, but also on how they evolve in time. Ahmed Zewail won the Nobel prize (1999) for "femtochemistry": the observation and control of dynamic chemical processes using ultrafast laser pulses, of a few millionths of a billionth of a second (femtoseconds). This is the scale of time on which atoms make or break bonds in chemical or biological processes, such as photosynthesis or combustion.

Nature however can be still "faster". The atoms in a molecule move on the scale of femtoseconds, but the electrons, which are the basis of chemical bonds, are much faster and in the processes they cause, they move a thousand times faster, that is, tens or hundreds of attoseconds (a billionth of a billionth of a second).

"Like many in the scientific community", explains Kevin Prince, first author of the article just published, "we have also been working for years to develop innovative analytical methods with attosecond resolution to study and control fast dynamics. With this work, that exploits the exceptional properties of the laser light from FERMI, we can say we have finally achieved our goal."

The result was achieved by an international team of researchers from Italy (Elettra-Sincrotrone Trieste, the Politecnico of Milano, the IFN, IOM and ISM institutes of CNR and ENEA), Japan (Tohoku University), Russia (Lomonosov Moscow State University), USA (Drake University, Des Moines, Iowa) and Germany (Technical University of Berlin, University of Freiburg, European XFEL, Hamburg, Max Planck Institute for Nuclear Physics, Heidelberg).

They used a beam of light of two wavelengths (that is, two different colours) and managed to control the direction of emission of electrons ejected from an atom by the light. The experiment had a time resolution of 3 attoseconds, which now makes possible the study and control extremely fast processes.

"This result opens a new avenue to study and control ultrafast processes that involve electron motion on the time scale of attoseconds. We are dreaming about controlling more complex processes such as photocatalytic processes where the charge transfer plays a key role" said Kiyoshi Ueda, who with his group at Tohoku University, contributed to planning and conducting the experiment, and analysing the results.

###

This research have been published in the international journal Nature Photonics. To read more go to Ellettra's website: http://www.elettra.eu/science/top-stories/controlling-electrons-with-attosecond-time-resolution.html.

See also: http://www.medea-horizon2020.eu/

Contact:

Dr. Kevin Prince
Elettra Sincrotrone Trieste, 34149 Trieste, Italy
Email: Prince@Elettra.eu
Tel: +39-040-3758584; +39-335 6949522

Prof. Kiyoshi Ueda and Dr. Denys Iablonskyi
IMRAM, Tohoku University, Sendai, Japan
Email:ueda@tagen.tohoku.ac.jp denys@tagen.tohoku.ac.jp
Tel: +81-(0)22-217-5481 (Ueda)
+81-(0)22-217-5483 (Iablonskyi)

Prof. Giuseppe Sansone
Politecnico di Milano, 20133 Milan, Italy
Email: giuseppe.sansone@polimi.it

Media Contact

Kiyoshi Ueda
ueda@tagen.tohoku.ac.jp
81-222-175-481

 @TohokuUniPR

http://www.tohoku.ac.jp/en/ 

Kiyoshi Ueda | EurekAlert!

More articles from Physics and Astronomy:

nachricht Further Improvement of Qubit Lifetime for Quantum Computers
09.12.2016 | Forschungszentrum Jülich

nachricht Electron highway inside crystal
09.12.2016 | Julius-Maximilians-Universität Würzburg

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>