Figure caption: Directional electron acceleration on glass nanospheres. A femtosecond laser pulse (coming from the left) hits a glass nanosphere. The light releases electrons (green) from the group of atoms.
A team of physicists and chemists has studied the interaction of light with tiny glass particles. The relationship between strong laser pulses and glass nanoparticles is a special one - one that could influence medical methods, as scientists from Rostock, Munich, and Berlin have discovered. The interplay between light and matter was studied by a team of physicists and chemists from the Laboratory of Attosecond Physics (LAP) at the Max Planck Institute of Quantum Optics (MPQ) and Ludwig-Maximilians-Universität Munich (LMU), from the Institute of Physics of the University of Rostock, and from Freie Universität Berlin. The researchers studied the interaction between strong laser pulses and glass nanoparticles, which consist of multiple millions of atoms. Depending on how many atoms were contained in the nanoparticles, these objects reacted differently over attosecond timescales (an attosecond is a billionth of a billionth of a second). Depending on their size, so-called near-fields (electromagnetic fields close to the particle surface) were induced by the laser pulses, resulting in a controlled directional emission of electrons. These findings could eventually extend cancer therapy and imaging methods in medicine.
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