Karl Joachim Ebeling

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Karl Joachim Ebeling 2013

Karl Joachim Ebeling (born October 27, 1949 in Hehlen ) is a German physicist and was President of Ulm University from 2003 to 2015 . His scientific achievements are mainly in the field of optoelectronics .

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Ebeling studied physics in Göttingen from 1969 to 1973 and received his doctorate in 1976 with summa cum laude on high-frequency holography of laser-generated cavitation bubbles. rer. nat. From 1976 to 1977 he worked as a postdoc at the University of Ulm, then went back to Göttingen, where he completed his habilitation in physics in 1984. During guest stays at the Bell Laboratories in Holmdel , USA, he discovered the single-mode oscillation of coupled semiconductor lasers under high-frequency modulation. He was also involved in the development of the first monolithic two-element semiconductor laser and developed a general theory for multi-element semiconductor lasers.

From 1985 to 1989 he was professor at the Institute for High Frequency Technology at the TU Braunschweig as head of the High Frequency Semiconductor Department. Here he is concerned with optical signal processing in integrated optical systems, narrow-band, tunable semiconductor laser systems for coherent optical message transmission and molecular beam epitaxy .

In 1989 he followed the call of the University of Ulm and took over the development and management of the new optoelectronics department. He researched and developed quantum structured III-IV semiconductors, integrated optoelectronic semiconductor components, fiber optic transmission systems and optical signal processing as well as semiconductor components based on gallium nitride . His working group with surface emitters (VCSEL) achieved particular importance . In 2001 it was the basis of a university spin-off (ULM Photonics GmbH) for the development, production and worldwide sales of new types of vertical laser diodes for various areas of application. The company, which has meanwhile been taken over by the Philips Group and has around 40 employees, is located in the Ulm Science Park and is still closely associated with the university.

From 1995 to 2001 he was Vice Rector for Research at Ulm University. From April 2001 to mid-2003 he was given leave of absence to work as research director at the chip manufacturer Infineon . During this time he also dealt with ultra-short channel transistors as elements of electronic nanotechnology, long-wave vertical laser diodes, processor architectures, polymer and molecular electronics as well as electronic bio and neurochips. In 2003 he returned to Ulm University after being elected rector. In May 2009 he was unanimously re-elected as President for a second term beginning in October of the same year for a further six years. From April 2012 to March 2014 he was chairman of the Baden-Württemberg State Rectors ' Conference.


Ebeling has been a full member of the math and science class of the Heidelberg Academy of Sciences since 1998 , and since 2010 also a member of the German Academy of Science and Engineering (Acatech) . In May 2010 he was also appointed by the Federal Government to the National Platform for Electric Mobility and was jointly responsible for leading the working group for young people and qualifications. He is a member of the supervisory board of the German University in Cairo (GUC).


  • Karl Joachim Ebeling: Integrated Optoelectronics: Waveguide Optics Photonics Semiconductors. Springer-Verlag, Berlin 1992, ISBN 978-0-387-54655-1 .

Web links

Individual evidence

  1. Prof. Ebeling - Rector designatus of the University of Ulm on uni-protocol.de of June 7, 2003.