*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.