K-State's fast laser research and theory building on Einsten's work by timing electrons emissions

Ultrafast laser research at Kansas State University has allowed physicists to build on Nobel Prize-winning work in photo-electronics by none other than Albert Einstein.Einstein received the Nobel Prize in 1921 for his theoretical explanation in 1905 of the so-called photo-effect -- that is, the emission of electrons from a metal surface by incident light.In Einstein's time, laboratory light sources provided light of very low intensity in comparison with modern lasers like those at K-State.

"It's a feat that would be impossible without high-intensity lasers like those at K-State's J. R. Macdonald Laboratory," Thumm said.
"Fifty attoseconds is about the time resolution needed to resolve the motion of electrons in matter," he said.
"It was a celebrated model, and it's still in textbooks as an explanation that light is made up of photons," Thumm said. "You can talk to a lot of physics students who get it wrong."
"In this case it's not the horse's hooves but the electrons that we're seeing," Thumm said.

Fast Laser Research And Theory Building On Einsten's Work By Timing Electrons Emissions

Theorists have developed a model that allows them to compute not just the energy of photo-emitted electrons, but also the times after their release at which they can be detected. Within their ...

Fri 22 May 09 from ScienceDaily

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