Øystein Fischer (born 9 March 1942 in Bergen, died 19 September 2013) was a Norwegian physicist and specialist in the field of superconductivity.
After having worked as a technical research assistant for the laboratory Nera A/S in Bergen, Norway, Fischer studied physics at the Swiss Federal Institute of Technology in Zurich.
With his team, Fischer launched the first artificial superlattices of superconductor cuprates, the pioneering work of many developments in new areas of thin films and oxide interfaces.
From 1986, Fischer assigned a part of his team to work in scanning tunneling microscopy which allowed him to probe the fundamental properties of high temperature superconductors.
Fischer initiated the Geneva Creativity Center whose purpose is to stimulate discussion between the academic and industrial sectors and to find innovative solutions for future technological challenges.