今日上海
上海超短强激光实验装置研究取得突破 - 2021年06月29日
Local researchers making 'molecular movies' with ultrafast lasers
There's nothing surprising about using lasers to take pictures of molecules. But how about taking films? It's not just talk.
Last Thursday, in the city's innovation highland of Zhangjiang, researchers fired an ultra-intense ray of light at testing samples to take X-ray photos. It took just 100 femtoseconds.
One femtosecond is equal to one quadrillionth of a second. Think of it this way: nothing is faster than light in a vacuum, but even so, in one femtosecond, it can travel only 300 nanometers – about the diameter of a virus.
