February 15, 2023

Zach passes his PhD qualifying exam. Congratulations Zach!

February 6, 2023

Elham re-joins our group, following her ASPIRES internship in 2022. Welcome back Elham!

November, 2022

Performed the first picosecond time-resolved ambient pressure x-ray photoelectron spectroscopy experiment at the Advanced Light Source.

Smiling faces after our team successfully completed the first picosecond time-resolved ambient pressure XPS experiment at the Advanced Light Source. The results will provide deeper insight into critical parameters determining interfacial charge transfer dynamics in nanoplasmonic solar light harvesting systems. Many thanks to the ALS staff for all their support!

August, 2022

Catherine graduates with her work on Dynamics in Helium Nanodroplets Induced via Multiphoton Absorption in the XUV and X-ray Regimes. Congratulations Catherine!

August 12, 2022

Camila's work on Anisotropic Surface Broadening and Core Depletion during the Evolution of a Strong-Field Induced Nanoplasma is published in Physical Review Letters!

C. Bacellar, A. S. Chatterley, F. Lackner, C. D. Pemmaraju, R. M. P. Tanyag, D. Verma, C. Bernando, S. O’Connell, M. Bucher, K. R. Ferguson, T. Gorkhover, R. Coffee, G. Coslovich, D. Ray, T. Osipov, D. M. Neumark, C. Bostedt, A. F. Vilesov, and O. Gessner, “Anisotropic surface broadening and core depletion during the evolution of a strong-field induced nanoplasma”, Phys. Rev. Lett. 129, 073201 (2022), DOI: 10.1103/PhysRevLett.129.073201.

June 2022

Sahan and Zach attend UXSS 2022 at SLAC

Sahan and Zach attended the Ultrafast X-ray Summer School organized by Stanford University's PULSE institute in collaboration with Center for FEL Science at DESY. The program's purpose was to train/introduce students and postdocs to opportunities in ultrafast science using X-ray Free Electron Lasers (XFEL) via lectures, tours, and data analysis workshops. Thank you UXSS! 

June 2022

Elham joins the group as a visiting undergraduate. Welcome!

Visiting from Cal. State University, East Bay, Elham hopes to obtain first-hand experience as to what the life of a grad student and researcher entails. She will be working with Lars Hoffman optimizing a HHG laser setup as well as learning how to analyze data via MATLAB. Welcome to the group, Elham! 

June 2022

Lars attends DAMOP in Orlando presents the latest results of his ultrafast electron diffraction study of UV-induced dissociation of bromoform.

May 2022

Wesley is born! Congratulations Matthew and Katy-Ann!!

April 2022

Johannes passes his PhD defense and graduates with his work on Probing Photoinduced Charge and Energy Transfer on the Nanoscale with Time-Resolved X-ray Spectroscopy Techniques; congratulations Johannes!

February 2022

Sahan joins the group as a postdoc! Welcome!

Dr. Perera, orginally hailing from Sri Lanka, received his MSc and PhD from the University of Saskatchewan under the direction of Dr. Stephen Urquhart in 2020. Following this, Sahan moved to Hawaii to pursue a postdoc with Dr. Ralf Kaiser studying the oxidation and decomposition processes of fuels with hopes of optimizing fuel performances for advanced aircraft applications. Now, he is going to work on time-resolved spectroscopy of light-harvesting systems. Our heartiest welcome!


January 2022

Zach joins the group as a graduate student! Welcome!

Zach, originally from WV, obtained his BS in Chemistry from WVU in 2020. Following a gap year in DC working with Children's National, he now joins us working on time-resolved spectroscopy of light-harvesting systems. Welcome aboard, Zach!


December 2021

Stefan's and Johannes' paper on Nanoscale Confinement of Photo-Injected Electrons at Hybrid Interfaces is published as a Cover Article in The Journal of Physical Review Letters.

Stefan Neppl, Johannes Mahl, Friedrich Roth, Giuseppe Mercurio, Guosong Zeng, Francesca M. Toma, Nils Huse, Peter Feulner, and Oliver Gessner, J. Phys. Chem. Lett. 12, 11951 (2021), DOI: 10.1021/acs.jpclett.1c02648.

September 2021

Catherine's paper on Charging and ion ejection dynamics of large helium nanodroplets exposed to intense femtosecond soft X-ray pulses is published in The European Physical Journal Special Topics.

Catherine A. Saladrigas, Alexandra J. Feinberg, Michael P. Ziemkiewicz, Camila Bacellar, Maximilian Bucher, Charles Bernando, Sebastian Carron, Adam S. Chatterley, Franz-Josef Decker, Ken R. Ferguson, Luis Gomez, Taisia Gorkhover, Nathan A. Helvy, Curtis F. Jones, Justin J. Kwok, Alberto Lutman, Daniela Rupp, Rico Mayro P. Tanyag, Thomas Möller, Daniel M. Neumark, Christoph Bostedt, Andrey F. Vilesov, and Oliver Gessner, “Charging and Ion Ejection Dynamics of Large Helium Nanodroplets Exposed to Intense Femtosecond Soft X-Ray Pulses”, Eur. Phys. J. Spec. Top. 230, 4011 (2021), DOI: 10.1140/epjs/s11734- 021-00280-0.

September 2020

Figures from our our paper on shapes of rotating normal fluid 3He versus superfluid 4He droplets are used as the official logo for the 2021 APS March Meeting.

Deepak Verma, Sean M. O. O’Connell, Alexandra J. Feinberg, Swetha Erukala, Rico M. Tanyag, Charles Bernando, Weiwu Pang, Catherine Saladrigas, Benjamin Toulson, Mario Borgwardt, Niranjan Shivaram, Ming-Fu Lin, Andre Al Haddad, Wolfgang Jäger, Christoph Bostedt, Peter Walter, Oliver Gessner, and Andrey F. Vilesov, Phys. Rev. B 102, 014504 (2020), DOI: 10.1103/PhysRevB.102.014504.