At
DTU Fotonik, research is conducted into the applications of light, including various forms of laser technology. This requires dark conditions. Therefore, some of the laboratories in the department’s new buildings are located below ground level.
This laboratory is home to the ‘Ultrafast Infrared and Terahertz Science’ research group. The research group works with generating ultrafast light impulses in the infrared and terahertz regions. These impulses can be used for ultrafast spectroscopy. This setup illustrates a 200 gigawatt invisible infrared laser which is directed at a very hot focal point. This way, air molecules are ionized into plasma, creating the pink and orange colours in the background.
The focal point is the small, white star-like spot in the centre of the picture.