G
Gregory S. Engel
Researcher at University of Chicago
Publications - 109
Citations - 8961
Gregory S. Engel is an academic researcher from University of Chicago. The author has contributed to research in topics: Coherence (physics) & Spectroscopy. The author has an hindex of 36, co-authored 105 publications receiving 8048 citations. Previous affiliations of Gregory S. Engel include Harvard University & Princeton University.
Papers
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Journal ArticleDOI
Redox Conditions Affect Ultrafast Exciton Transport in Photosynthetic Pigment-Protein Complexes.
Marco A. Allodi,John P. Otto,Sara H. Sohail,Rafael G. Saer,Ryan E. Wood,Brian S. Rolczynski,Sara C. Massey,Po-Chieh Ting,Robert E. Blankenship,Gregory S. Engel +9 more
TL;DR: Two-dimensional electronic spectroscopy observes differences in femtosecond energy-transfer processes in the Fenna-Matthews-Olson antenna complex under different redox conditions and identifies a highly conserved tyrosine/tryptophan chain near the chromophores showing the largest changes.
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Excitations Partition into Two Distinct Populations in Bulk Perovskites
Lili Wang,Nicholas P. Brawand,Márton Vörös,Peter D. Dahlberg,Peter D. Dahlberg,John P. Otto,Nicholas E. Williams,David M. Tiede,Giulia Galli,Giulia Galli,Gregory S. Engel +10 more
Journal ArticleDOI
Connecting bright and dark states through accidental degeneracy caused by lack of symmetry
TL;DR: In this paper, the authors examined an excitonic ring structure and identified an accidental degeneracy between two categories of double-excitation eigenstates with distinct symmetries and optical transition properties.
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Sub-10 fs Intervalley Exciton Coupling in Monolayer MoS2 Revealed by Helicity-Resolved Two-Dimensional Electronic Spectroscopy.
Lawson T. Lloyd,Ryan E. Wood,Fauzia Mujid,Siddhartha Sohoni,Karen L. Ji,Po-Chieh Ting,Jacob S. Higgins,Jiwoong Park,Gregory S. Engel +8 more
TL;DR: In this article, the authors employed broadband helicity-resolved two-dimensional electronic spectroscopy (2DES) to observe ultrafast (∼10 fs) intervalley coupling between all A and B valley exciton states that results in a complete breakdown of the valley index in large-area monolayer MoS2 films.
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Dark states and delocalization: competing effects of quantum coherence on the efficiency of light harvesting systems
TL;DR: In this article, the authors explore the two competing mechanisms in a chain-structured antenna and show that dark state protection is the dominant mechanism, with an intriguing dependence on the parity of the number of chromophores.