Aarhus University Seal

Steen Brøndsted Nielsen



Primary affiliation

Steen Brøndsted Nielsen CV

Areas of expertise

  • Mass spectrometry
  • Fluorescence spectroscopy
  • Biospectroscopy
  • Molecular physics
  • Circular dichroism

Contact information

Telephone number
Email address


PhD University of Copenhagen (2000). (Student visits University of Oslo, University of Alberta, and Yale.) Post doc Aarhus University and Princeton University. Invited Guest Professor Université Paris 13, Université Paris13, Université de Caen Basse Normandie, and Université Paris-Sud 11 (Orsay). JILA Visiting Fellow, University of Colorado, Boulder. dr scient Aarhus University.



My group explores the intrinsic photophysics of isolated molecular ions in vacuo using state-of-the-art equipment. We have designed and built two setups for fluorescence spectroscopy of mass-selected ions, LUNA (LUminescence iNstrument in Aarhus) and LUNA2, the latter operating at cryogenic temperatures. As an example, we have revealed the true color of oxyluciferin, the molecular anion responsible for light emission from fireflies, click beetles, and railroad worms.   

Teaching activities

Courses on mechanics; thermodynamics; electrodynamics; biophysics; photobiophysics; energy and climate; modern physics for chemists; group theory and electronic structure of molecules.


Professor Henrik G. Kjærgaard, University of Copenhagen

Professor Mogens Brøndsted Nielsen, University of Copenhagen

Dr. Mark H. Stockett, Stockholm University

Dr. James N. Bull, University of East Anglia


Selected publications

Use arrow keys on your keyboard to explore

Selected activities

Use arrow keys on your keyboard to explore