Miller Fellow, UC Berkeley 2005-2007
Ph.D., Harvard University, 2004
A.M., Harvard University, 2001
A.B., Princeton University, 1999
929 East 57th Street
Chicago, IL 60637 USA
Research in the Engel Group focuses on excited state reactivity including excitonic transport, non-radiative relaxation to photochemical products, and new methods to image excited state dynamics. Excited states in the condensed phase have an extremely high chemical potential thereby making them highly reactive and difficult to control. Our control strategy involves exploiting coherent response of the environment to the excitation event. In particular, we develop methodologies to manipulate two fundamental components of excited state dynamics: exciton migration and non-radiative relaxation.
Our approach is inspired by biological systems optimized by evolution to exploit manifestly quantum mechanical phenomena to drive coherent energy transfer, to steer trajectories through conical intersections and to protect long-lived quantum coherence. Currently, we are focusing on four key scientific efforts: (1) new techniques to image excited state dynamics, (2) understanding mechanisms of quantum transport in photosynthesis, (3) dynamics of conical intersections in the condensed phase, and (4) engineering quantum dynamics in new classes of synthetic materials.
The Engel Group program explores the interface between biology and quantum mechanics by creating new tools to explore design principles of coherent processes in proteins. Photosynthetic light harvesting and photoenzymatic dynamics exploit coherent protein motions for chemical control in a way that we do not yet fully understand. For example, Photosynthetic antenna complexes operate with near perfect quantum efficiency and steer excitonic motion with exquisite precision. These complexes exploit both incoherent (Förster) energy transfer along with coherent (wavelike) motion of energy in a process called Environmentally Assisted Quantum Transport that offers quantum efficiency superior to either mechanism alone. The Engel group seeks to isolate and copy the microscopic details of this process. In particular, we want to know if the process is a result of evolutionary fine-tuning and, regardless, how we can enable coherent energy transfer in synthetic systems for light harvesting, sensing, and communications.
To probe these systems, we design new femtosecond spectrometers to observe how electronic states couple to one another much the way COSY NMR explores nuclear spin coupling. Exploiting this analogy, we recently developed the first optical analog to MRI for rapid detection electronic couplings. The Engel group is strongly interdisciplinary; graduate students matriculate through Chemistry and the Biophysical Sciences while postdoctoral scholars have PhDs in Chemistry or Physics. The group contains pure theorists, organic chemists, inorganic chemists, physical chemists, physicists, and biophysicists. Engel and his lab members collaborate with physicists, biologists, engineers, and corporate partners to develop new technologies and new science.
Greg enjoys spending time with his family, hiking in the Driftless region of Wisconsin, cross country skiing (he's not any good), and shooting.
Born: 9/23/1977, West Chester, PA, USA.
Princeton University, A.B., 1999
Harvard University, A.M., 2001
Harvard University, Ph.D., 2004
Harvard University, Postdoctoral Scholar, 2004-2005
University of California, Berkeley, Postdoctoral Fellow, 2005-2007
University of Chicago, Professor, 2007-
P. Navotnaya,* S. Sohoni,* L.T. Lloyd, S. Abdulhadi, P.-C. Ting, J.S. Higgins, and G.S. Engel, "Annihilation of Excess Excitations along Phycocyanin Rods Precedes Downhill Flow to Allophycocyanin Cores in the Phycobilisome of
* These authors contributed equally
J.S. Higgins,* M.A. Allodi,* L.T. Lloyd, J.P. Otto, S.H. Sohail, R.G. Saer, R.E. Wood, S.C. Massey, P.-C. Ting, R.E. Blankenship, G.S. Engel, "Redox conditions correlated with vibronic coupling modulate quantum beats in photosynthetic pigment-protein complexes", PNAS 118 e2112817118 2021.
* These authors contributed equally
J.S. Higgins, W.R. Hollingsworth, L.T. Lloyd, and G.S. Engel, "Quantum Coherence in Chemical and Photobiological Systems", Emerging Trends in Chemical Applications of Lasers, ACS Symposium Series #1398, Edited by M.R. Berman, L. Young, and H.-L. Dai, ACS Books 2021.
M. Onizhuk,* S. Sohoni,* G.A. Galli, and G.S. Engel, "Spatial Patterns of Light-harvesting Antenna Complex Arrangements Tune the Transfer-to-trap Efficiency of Excitons in Purple Bacteria", JPCL 12, 6967−6973 2021
* These authors contributed equally
B.S. Rolczynski, S.-H. Yeh, P. Navotnaya, L.T. Lloyd, A.R. Ginzburg, H. Zheng, M.A. Allodi, J.P. Otto, K. Ashraf, A. Gardiner, R. Cogdell, S. Kais, and G.S. Engel, "Time-domain Line-shape Analysis from 2D Spectroscopy to Precisely Determine Hamiltonian Parameters for a Photosynthetic Complex", J. Phys. Chem. B 125 2812 2021.
Y. Kim, F. Bertagna, E.M. D’Souza, D.J. Heyes, L.O. Johannissen, E.T. Nery, A. Pantelias, A. Sanchez-Pedreño Jimenez, L. Slocombe, M.G. Spencer, J. Al-Khalili, G.S. Engel, S. Hay, S.M. Hingley-Wilson, K. Jeevaratnam, A.R. Jones, D.R. Kattnig, R. Lewis, M. Sacchi, N.S. Scrutton, S.R.P. Silva, and J. McFadden, "Quantum Biology: An Update and Perspective", Quantum Rep. 3, 80-126 2021.
L.T. Lloyd, R.E. Wood, M.A. Allodi, S. Sohoni, J.S. Higgins, J.P. Otto, and G.S Engel, "Leveraging scatter in two-dimensional spectroscopy: passive phase drift correction enables a global phasing protocol", Optics Express 28, 32869-328 2020.
Congratulations to Jake Higgins, Anna Dardia, Chidera Ndife, Lawson Lloyd, and Elizabeth Bain on having their paper entitled, "Leveraging Dynamical Symmetries in Two-Dimensional Electronic Spectra to Extract Population Transfer Pathways" accepted to Journal of Physical Chemistry A.
Congratulations to Polina Navotnaya, Sid Sohoni, Lawson Lloyd, Sami Abdulhadi, Po-Chieh Ting, and Jake Higgins on having their paper entitled, "Annihilation of Excess Excitations along Phycocyanin Rods Precedes Downhill Flow to Allophycocyanin Cores in the Phycobilisome of
Congratulations to Jake Higgins, Marco Allodi, Lawson Lloyd, John Otto, Sara Sohail, Ryan Wood, Sara Massey, and Po-Chieh Ting as well as our collaborators in the Blankenship Group on having their paper entitled, "Redox conditions correlated with vibronic coupling modulate quantum beats in photosynthetic pigment-protein complexes" published in PNAS.
Congratulations to Sid Sohoni and our collaborators in the Galli Group on having their paper, entitled "Spatial Patterns of Light-harvesting Antenna Complex Arrangements Tune the Transfer-to-trap Efficiency of Excitons in Purple Bacteria" accepted at JPCL.
Congratulations to Lawson Lloyd, Ryan Wood, Sid Sohoni, Karen Ji, Po-Chieh Ting, Jake Higgins, and our collaborators in the Park Group on having their paper entitled, "Sub-10 fs Intervalley Exciton Coupling in Monolayer MoS2 Revealed by Helicity-Resolved Two-Dimensional Electronic Spectroscopy" published in ACS Nano.