What’s in a Femtosecond of Laser Light? A Map of Electron Energy
A team of researchers at the California Institute of Technology has observed electrons in action, creating maps that show the energy fields of excited electrons over time on silver and copper surfaces. Using an electron microscope, the scientists focused the beam on a silver nanoparticle with a larger graphene backing for a femtosecond (one millionth of one billionth of a second, or really, really, *really* short). The energy gain (or loss) is then calculated from the time delay between the pulses of laser light and electrons. The researchers call the technique “ultrafast spectrum imaging,” which actually fails to capture in language how fast it is.
Click through for article. Full pdf of research paper here. (Requires subscription to Science.)
Femtosecond spectroscopy! Yay!
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