Both of interest. Got references where one can read further??
There is a list of publications upon the page for the retired department chair Leif Holmlid, covering published papers from 2004 to the start of 2021. His total research history covers a large territory with contributions dating to the 1970 time frame.
The listing is a valid starting point for relevant background. He has due to ill health, largely passed the torch to others, so more recent paper co-authors tend to lead the experimental effort.
https://www.gu.se/en/about/find-staff/leifholmlid
https://publons.com/researcher/2826392/leif-holmlid/publications/