Science Daily  April 26, 2023 Researchers in Germany have shown that by superimposing two laser fields of different strengths and frequency, the electron emission of metals can be measured and controlled precisely to a few attoseconds. So far, scientists have only been able to determine laser-induced electron dynamics precisely in gases with an accuracy of a few attoseconds. Quantum dynamics and emission time windows have not yet been measured on solids. Instead of just a strong laser pulse, which emits the electrons a pointy tungsten tip, they also used a second weaker laser with twice the frequency. The electrons then […]