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David JONAS
Office Phone: 303 492 3818
E-mail: David.Jonas@colorado.edu
FAX: 303 492 5894
Lab: Ekeley W155
Lab Phone: 303 492 6983
Group Website:
Ph.D.: Massachusetts Institute of Technology, 1992
Postdoctoral Fellow: NSF Fellow at University of Chicago, 1992-94
David and Lucile Packard Fellow in Science and Engineering, 1996-2001
University of Colorado Junior Faculty Development Award, 1996
Camille and Henry Dreyfus New Faculty Award, 1995
Fast Electronic and Vibrational Dynamics
Fast electronic motions are important in photochemistry, photosynthesis, interfacial electron transfer, and in some proposed next generation photovoltaics. In 1998, our group used femtosecond lasers to demonstrate the first optical analogs of early two-dimensional NMR experiments. Our approach is now widely used to measure fast electronic and vibrational motions in disordered environments such as liquids, proteins, and semiconductors, but more work is needed to develop 2D spectroscopy as an analytical technique. We have used 2D femtosecond spectroscopy to probe the fastest electronic motions within molecules, the vibrations coupled to those motions, and the coupled motions of the environment. Topics of interest include electronic dynamics at "conical intersections" between electronic potential surfaces, surface enhanced Raman scattering on metallic nano-particles, multiple exciton generation in semiconductor quantum dots, and other approaches to higher efficiency solar energy conversion.
Selected Publications
"Two-Dimensional Electronic Spectroscopy", John D. Hybl, Allison W. Albrecht, Sarah M. Gallagher Faeder, and David M. Jonas, Chem. Phys. Lett. 297, 307-313 (1998).
"Pump-Probe Polarization Anisotropy Study of Doubly Degenerate Electronic Reorientation in Silicon Naphthalocyanine" Allison Albrecht Ferro, and David M. Jonas, J. Chem. Phys. 115, 6281-6284 (2001).
"Polar Solvation Dynamics in the Femtosecond Evolution of Two Dimensional Fourier Transform Spectra" John D. Hybl, Anchi Yu, Darcie A. Farrow, and David M. Jonas, J. Phys. Chem. A 106, 7651-7654 (2002).
"Two-Dimensional Femtosecond Spectroscopy" David M. Jonas, Annu. Rev. Phys. Chem. 54, 425-463 (2003).
"Optical Analogs of 2D NMR" David M. Jonas, Science 300, 1515-1517 (2003).
"Three-dimensional view of signal propagation in femtosecond four-wave mixing with application to the boxcars geometry", Nadia Belabas and David M. Jonas, J. Opt. Soc. Am. B 22, 655-674 (2005).
"2D Correlation Analysis of the Continuum in Single Molecule Surface Enhanced Raman Spectroscopy", Amy A. Moore, Michele L. Jacobson, Nadia Belabas, Kathy L. Rowlen, David M. Jonas, J. Am. Chem. Soc. 127, 7292-7293 (2005).
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