Dr. Doumy is a Physicist in the Atomic, Molecular, and Optical Physics Group in the Chemical Sciences and Engineering Division. His current research interests include following the ultrafast dynamics induced by light or x-ray absorption in atoms and molecules. Using both synchrotron and x-ray free electron laser facilities, his expertise is in developing new spectroscopy techniques to follow the first steps of photochemical reactions by measuring changes in electronic and structural configurations. 

Education

• Ph.D., Physics, Graduate school of Ecole Polytechnique, Palaiseau, FRANCE, 2006
• Masters, ​‘Lasers and Matter’, Paris XI University, Orsay, FRANCE, 2002
• Engineer of Ecole Polytechnique, Palaiseau, FRANCE, 2001

Selected Publications

• A.E.A. Fouda et al, ​“Resonant double-core excitations with ultrafast, intense X-ray pulses”, Mol. Phys.,121 (7-8), e2133749 (2023)
• A. Al Haddad et al, ​“Observation of site-selective chemical bond changes via ultrafast chemical shifts”, Nat. Commun., 13 (1), 7170 (2022)
• D.C. Haynes et al, ​“Clocking Auger electrons”, Nat. Phys., 17 (4), 512-518 (2021) 
• Z.H. Loh et al, ​“Observation of the fastest chemical processes in the radiolysis of water”, Science, 367 (6474), 179-182 (2020)
• A.M. March et al, ​“Elucidation of the photoaquation reaction mechanism in ferrous hexacyanide using synchrotron x-rays with sub-pulse-duration sensitivity”, J. Chem. Phys., 151 (14) (2019)
• M. C. Hoffmann et al, ​“Femtosecond profiling of shaped x-ray pulses”, New J. Phys., 20, 033008 (2018)
• A. M. March et al., ​“Probing transient valence orbital changes with picosecond valence-to-core X-ray emission spectroscopy,” J. Phys. Chem. C 121, 2620-2626 (2017). 
• A. Picon et al, ​“Optically-dressed resonant Auger processes induced by high intensity x-rays”, New J. Phys, 15, 083057 (2013)
• K. Haldrup et al., ​“Guest-host interactions investigated by time-resolved X-ray spectroscopies and scattering at MHz rates:  solvation dynamics and photoinduced spin transition in aqueous [Fe(bipy)₃]²⁺,” J. Phys. Chem. A 116, 9878-9887 (2012)
• G. Doumy et al, ​“Nonlinear atomic response to intense ultrashort x-rays”, Phys. Rev. Lett., 106, 8, 083002 (2011)