Worlds fastest, shortest laser pulse created

Scientists have successfully created the worlds shortest X-ray laser pulse with a duration of just 43 attoseconds, an advance that will allow us to observe electrons in slow motion. In order to fully understand the dynamics during a chemical reaction, scientists must be able to study all movements of atoms and molecules on their basic time scale.

Molecules rotate in the range of picoseconds, their atoms vibrate in the range of femtoseconds, and the electrons move in the range of attoseconds. Researchers from ETH Zurich in Switzerland succeeded in generating the worlds shortest laser pulse with a duration of only 43 attoseconds. This laser pulse is the shortest controlled event that has ever been created by humans. The researchers can now observe in high detail how electrons move within a molecule or how chemical bonds are formed.

Attosecond spectroscopy could contribute to the development of more efficient solar cells since it is now for the first time possible to follow the process of excitation through sunlight up to the generation of electricity step by step. Such targeted interventions in chemical reactions have not been possible until now, since the time scale of electron movement in molecules was previously unreached.

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