text: *2006 –  Research Prize of the Chemistry Faculty of the University of Bochum
  *2006 –  Benjamin Franklin Medal in Physics (with Jan Peter Toennies) from the Franklin Institute.
  *2003   – Creativity Award from the NSF 2003-5
  *2004	– Texas A&M University, Frontiers in Chemical Research Lecturer
  *2004	– Moscowitz Lecturer at the University of Minnesota, October 2004
  *2003	– Distinguished Visiting Professor, University of Florida, Gainesville.
  *2003	– Earle K. Plyler Prize for Molecular Spectroscopy from the American Physical Society (with Kevin K. Lehmann).
  *2002	– Peter Debye Award in Physical Chemistry from the American Chemical Society
  *2001	– H. E. Gunning Lecturer, Dept. of Chem., University of Alberta
  *2000	– Elected Foreign Member of The Royal Netherlands Academy of Arts and Sciences
  *2000	– Honorary Science Doctorate from the University of Waterloo
  *1999	– Samuel M. McElvain Lecturer, University of Wisconsin–Madison
  *1997	– Elected Fellow of The Royal Society (United Kingdom)
  *1996	– Recipient of an Honorary Doctorate in Physics from the University of Genoa
  *1995	– Recipient of a Senior Fellowship of the Alexander von Humboldt Foundation
  *1995	– Recipient of the 1995 Lippincott Award of the Optical Society of America, the [http://www.coblentz.org/ Coblentz Society], and the Society for Applied Spectroscopy
  *1986	– Senior Killam Fellowship.