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Image: Peter Seidel
Nobel Prize in Physics 2023
Year of election: | 2016 |
Section: | Physics |
City: | Munich |
Country: | Germany |
Research Priorities: Attosecond physics, high-field physics, real-time observation of fundamental electron processes, development of laser systems, petawatt field synthesizers (PFS)
Ferenc Krausz is a Hungarian-Austrian physicist. He is considered the father of attosecond physics, which monitors and studies ultra speed motions of electrons. Based on his research, numerous fields of study have been founded – such as the high-resolution microscopy of living organisms. Furthermore, he developed lasers that aid in the diagnosis of cancer and ophthalmic diseases.
Together with his team, Ferenc Krausz was the first to produce and measure an attosecond light pulse, with an attosecond being one billionth of a billionth of a second (0.000,000,000,000,000,001 Seconds). Ferenc Krausz can monitor an electron’s movement within an atom in real time with the help of these attosecond light pulses. He and his team also developed the laser systems and components that enable them to do so. Electrons move with a speed of about one thousand kilometres per second. The attosecond flash functions not unlike an extremely rapid photo flash that freezes motion at a given point in time. Thus, the researchers around French Krausz were able to measure that an electron needs between seven and twenty attoseconds to traverse the atom envelope. The specific velocity depends on the extent that the atoms interact with each other and the nucleus.
With a sufficiently high intensity, the attosecond light pulse can sever electrons from their atomic bonding and accelerate them close to light speed. This opens the door to high-field attosecond physics. Ferenc Krausz aims to develop a petawatt field synthesizer (PFS) by combining different lasers to produce light pulses of one quadrillion watt (Petawatt). This would enable him and his team to visualise these processes with even more detail.
With the help of the tools developed by him, Ference Krausz was able to observe fundamental processes of electrons such as charge transport, tunnelling, and the photoelectric effect in real time. These technologies can be used in the development of quantum computers and supra conductors. But they can also be applied in medicine with the early diagnosis and treatment of malignant tumors. These laser-based techniques are not only more gentle than radiotherapy but also more precise.