World's quickest laser pulse can track electrons in slow motion
 

The race to produce ever-faster laser pulses has set a new record, and it could lead to breakthroughs in our understanding of atom-level physics. A team at ETH Zurich has shortened an X-ray pulse to just 43 attoseconds (10-18 seconds), which is quick...

https://www.engadget.com/2017/10/29/...ack-electrons/