Daniel Rolles

Daniel RollesAssociate Professor
327 Cardwell Hall
(785) 532-1615
Group Webpage

Ph.D. (Dr. rer. nat.) Technische Universität Berlin, 2005
M.Sc. (Diplom) Technische Universität Berlin, 2001

Research Area

Experimental Atomic, Molecular & Optical Physics; Ultrafast X-Ray Science

Taking a movie of a chemical reaction with atomic resolution? Watching the making and breaking of chemical bonds in real time? Using experimental techniques such as femtosecond time-resolved photoelectron spectroscopy and diffraction, time-resolved ion momentum imaging, and electron-ion coincidence spectroscopy, my research focuses on visualizing nuclear and electronic dynamics during photoionization and other photochemical reactions in gas-phase molecules by means of femtosecond pump-probe experiments. Our experiments combine lab-based studies using intense few-cycle optical lasers and their high-order harmonics in the XUV domain with intense and short-pulse VUV and X-ray radiation from Free-Electron Lasers, e.g. the Linac Coherent Light Source (LCLS) at Stanford, FLASH in Hamburg, Germany, and SACLA in Japan. This is complemented by electron-ion coincidence experiments and spectroscopy with 3rd generation synchrotron sources such as the Advanced Light Source (ALS) in Berkeley and PETRA III in Hamburg, Germany.

Research Support

  • Department of Energy
  • National Science Foundation

Graduate Advisees

  • Kurtis Borne
  • Lana Chaleunrath-Pham
  • Tristan Fehl
  • Tu Thanh Nguyen
  • Zane Phelps
  • Anbu Venkatachalam

Postdoctoral Advisees

  • Avijit Duley
  • Huynh Lam

Recent Selected Publications

E. Wang, N.G. Kling, A.C. LaForge, R. Obaid, S. Pathak, S. Bhattacharyya, S. Meister, F. Trost, H. Lindenblatt, M. Kübel, T. Pfeifer, S. Diaz-Tendero, F. Martin, A. Rudenko, R. Moshammer, D. Rolles, and N. Berrah, Ultrafast roaming mechanisms in ethanol probed by intense XUV free-electron laser radiation: electron transfer versus proton transfer, J. Phys. Chem. Lett. 14, 4372-4380 (2023). [link]

F. Ziaee, K. Borne, R. Forbes, Kanaka Raju P., Y. Malakar, B. Kaderiya, T. Severt, I. Ben-Itzhak, A. Rudenko and D. Rolles, Single- and multi-photon-induced ultraviolet excitation and photodissociation of CH3I probed by coincident ion momentum imaging, Phys. Chem. Chem. Phys. 25, 9999 (2023). [link]

R. Boll, J. Schäfer, B. Richard, K. Fehre, G.R Kastirke, M. Abdullah, N. Anders, T.M. Baumann, A. Czasch, S. Eckart, B. Erk, A. De Fanis, L. Foucar, S. Grundmann, P. Grychtol, A. Hartung, M. Hofmann, M. Ilchen, L. Inhester, C. Janke, Z. Jurek, M. Kircher, K. Kubicek, M. Kunitski, X. Li, T. Mazza, S. Meister, N. Melzer, J. Montano, V. Music, G. Nalin, Y. Ovcharenko, C. Passow, A. Pier, N. Rennhack, J. Rist, D.E. Rivas, D. Rolles, I. Schlichting, L.Ph.H. Schmidt, P. Schmidt, M.S. Schöffler, J. Siebert, N. Strenger, D. Trabert, F. Trinter, I. Vela-Perez, R. Wagner, P.Walter, M. Weller, P. Ziolkowski, R. Dörner, S.-K. Son, A. Rudenko, M. Meyer, R. Santra, and T. Jahnke, X-ray induced Coulomb explosion images complex single molecules, Nature Physics 18, 423-428 (2022). [link]

S. Bhattacharyya, K. Borne, F. Ziaee, S. Pathak, E. Wang, A. Venkatachalam, X. Li, N. Marshall, C. Fehrenbach, T. Severt, I. Ben-Itzhak, A. Rudenko and D. Rolles, Strong-field-induced Coulomb explosion imaging of tribromomethane, J. Phys. Chem. Lett. 13, 5845 (2022). [link]

D, Rolles, Time-resolved experiments on gas-phase atoms and molecules with XUV and X-ray free-electron lasers, Adv. Phys. X 8, 2132182 (2022). [link]