(born 6 May 1941, Bratislava) is a Slovak physicist and senior research fellow at the Slovak Academy of Sciences (SAS).
He is Doctor honoris causa of University of Salento, Italy, Slovak University of Technology in Bratislava, University of Constantine the Philosopher in Nitra, Slovakia, and Alexander Dubcek University in Trencín, Slovakia.
He occupied positions of the Director of the Institute of Physics of SAS for the period of 9 years and was the President of SAS 14 years (1995–2009).
He was the Acting President of the All European Academies (federation of European academies of sciences and arts) and the Acting President of the Central European Academy of Sciences and Arts.
At present, he is a member of Senate and Vice-president of the European Academy of Sciences and Arts with the headquarters in Salzburg.
He has chaired the Editorial Board of the Slovak Encyclopaedia Beliana since 1992.
His research field covers physics of semiconductors and metals, electronic devices, laser technology, X-ray optics, nanoscience and nanotechnology.
He published more than 400 scientific papers, 8 patents and 10 books of non-fiction literature.