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Principal Investigator
Oliver Gessner, PhD
Group Leader and Leader of the Atomic, Molecular and Optical Sciences (AMOS) Program at Berkeley Lab
Email: OGessner@lbl.gov
Postdoctoral Fellows
Dr. Debadarshini (Jolly) Mishra
Ph.D. Physics 2024, University of Connecticut
M.Sc. University of Hyderabad, Hyderabad, India
B.S. St. Xavier’s College, Mumbai, India
Projects: X-ray transient absorption spectroscopy; ultrafast electron diffraction
Email: dmishra@lbl.gov
Graduate Students
Zachery Donnellan, 3rd year Ph.D. Candidate
B.S. Chemistry 2020, West Virginia University
Project: Time-resolved X-ray photoelectron spectroscopy of light harvesting systems
Hobbies: Climbing, hiking, video games, reality tv
Email: Zachery_Donnellan@berkeley.edu
Lars Hoffman, 4th year Ph.D. Candidate
B.S. Chemistry 2016, Freie Universität Berlin, Germany
Projects: X-ray transient absorption spectroscopy; ultrafast electron diffraction
Hobbies: Running, hiking, gaming, and esports
Email: LarsHoffmann@lbl.gov
Undergraduate Students
Gautam Ramkumar
UC Berkeley and Lawrence Berkeley National Laboratory
Projects: Time-resolved X-ray photoelectron spectroscopy of light harvesting systems
Email: gramkumar@lbl.gov
Melody Li
UC Berkeley and Lawrence Berkeley National Laboratory
Projects: Time-resolved X-ray photoelectron spectroscopy of light harvesting systems; ultrafast electron diffraction
Email: MelodyLi@lbl.gov
Christian Claudio
UC Berkeley and Lawrence Berkeley National Laboratory
Project: Spectroscopy and imaging of dynamics in helium nanodroplets
Email: CClaudio@lbl.gov
Recent Alumnae and Alumni
Dr. Sahan Perera
Air Liquide, Fremont, CA
Ph.D. Chemistry 2019, University of Saskatchewan
M.Sc. University of Saskatchewan
Project: Time-resolved X-ray photoelectron spectroscopy of light harvesting systems
Hobbies: Nature photography, board games, and cricket
Dr. Kin Fung Lai
Ph.D. Physics 2022, Vrije Universiteit Amsterdam
M.Sc. Chinese University of Hong Kong
Project: X-ray transient absorption spectroscopy of chemical dynamics
Elham Ghanem
B.S. Chemistry 2023, Cal State Univ., East Bay
Project: X-ray transient absorption spectroscopy and ultrafast electron diffraction
Hobbies: Tennis, watching movies
Dr. Catherine Saladrigas
University of Colorado, Boulder CO
Ph.D. 2022, UC Berkeley and Lawrence Berkeley National Laboratory
B.S. Physics 2016, MIT
Project: Spectroscopy and imaging of dynamics in helium nanodroplets
Hobbies: Hiking, kayaking, hotsprings, piano, gluten free cooking
Dr. Matthew Fraund
Diablo Valley College, Pleasant Hill, CA
Ph.D. University of the Pacific
B.S. Chemistry 2012, UC Berkeley
Project: Time-resolved X-ray photoelectron spectroscopy of light harvesting systems
Hobbies: Cooking, video games, and tinkering
Chuying Huang
Ph.D. Student, Northwestern University, Evanston, IL
B.S. Chemistry 2022, UC Berkeley
Project: TrXPS, Synchrotron experiments at the ALS, FLASH, SLAC
Hobbies: Travelling
Lida Kaphar
California Department of Public Health
B.A. MCB Neurobiology 2023, UC Berkeley
Project: TrXPS, Synchrotron experiments at the ALS, FLASH, SLAC
Hobbies: Taekwondo, sewing, thrifting
Nathan Helvy
Ph.D. Student, University of Iowa, Iowa City, IA
B.S. Physics and Applied Math 2021, UC Berkeley
Project: Spectroscopy and dynamics in helium droplets
Hobbies: Reading, robotics, D&D, hiking
Alumnae and Alumni
Johannes Mahl, Lawrence Berkeley National Laboratory, Berkeley CA, USA
Benjamin Toulson, KLA, Milpitas CA, USA
Felix Brausse, European XFEL, Hamburg-Schenefeld, Germany
Mario Borgwardt, BESTEC GmbH, Berlin, Germany
Davide Faccialà, Politecnico di Milano, Italy
Charlie Cummings, University of Pennsylvania, Philadelphia, PA
Tahiyat Rahman, University of Washington, Seattle WA, USA
Camila Bacellar, Paul Scherrer Institute, Villigen, Switzerland
Florian Lackner, Styria State Government, Graz, Austria
Stefan Neppl, Paul Scherrer Institute, Villigen, Switzerland
Adam Chatterley, Aarhus University, Assistant Professor
Sri Chaitanya Das Pemmaraju, IBM, Menlo Park CA
Michael Ziemkiewicz, BAE Systems, Boulder CO
Frank Stienkemeier, University of Freiburg, Germany
Jonathan Han Son Ma, Applied Materials, Santa Clara , USA
Katrin Siefermann, Carl Zeiss AG, Oberkochen, Germany
Fabian Weise, ASML, Berlin, Germany
Clement Jacquard, CAILabs
Ming-Fu Lin, SLAC National Accelerator Laboratory
Ali Eftekhari-Bafrooei, Apple Inc., Cupertino CA, USA
Oliver Bünermann, University of Göttingen / Max Planck Institute for Biophysical Chemistry
Oleg Kornilov, Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany
Chia Wang, National Sun Yat-Sen University, Kaohsiung, Taiwan
Matthew Leonard, Octave, San Francisco CA
Andrew Healy, University of Minnesota, Minneapolis MN
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