Catherine Kealhofer

Catherine Kealhofer

Assistant Professor of Physics

Hopper Science Center Rm 30


A.B. Princeton University (2003)
Ph.D. Stanford University (2013)

Scholarship/Creative Work

Research Interests

I am interested in techniques to generate, manipulate and characterize ultrafast electron pulses with the goal of developing table-top tools for measuring structural dynamics of materials at the atomic scale.


D. Ehberger, C. Kealhofer, P. Baum, “Electron energy analysis by phase-space shaping with THz field cycles,” Structural Dynamics 5, 044303 (2018)

C. Kealhofer, W. Schneider, D. Ehberger, A. Ryabov, F. Krausz, P. Baum, “All-optical control and metrology of electron pulses,” Science 352, 429-433 (2016)

C. Kealhofer, S. Lahme, T. Urban, P. Baum “Signal-to-noise in femtosecond electron diffraction,” Ultramicroscopy 159, 19-25 (2015)

C. Kealhofer, B. B. Klopfer, G. E. Skulason, T. Juffmann, S. M. Foreman, M. A. Kasevich, “Ultrafast oscilloscope based on laser-triggered field emitters,” Optics Letters 40, 260-263 (2015)

S. Lahme, C. Kealhofer, F. Krausz, and P. Baum, “Femtosecond single-electron diffraction,” Structural Dynamics 1, 034303 (2014)

S. M. Foreman, C. Kealhofer, G. E. Skulason, B. B. Klopfer, M. A. Kasevich, “Ultrafast microfocus x-ray source based on a femtosecond laser-triggered tip,” Annalen der Physik 525, L19-L22 (2013)

C. Kealhofer, S. M. Foreman, S. Gerlich, M. A. Kasevich, “Ultrafast laser-triggered emission from hafnium carbide tips,” Phys. Rev. B 86 035405 (2012)

P. Hommelhoff, C. Kealhofer, A. Aghajani-Talesh, Y. Sortais, S. M. Foreman, M. A. Kasevich, “Extreme localization of electrons in space and time,” Ultramicroscopy 109 423-429 (2009)

P. Hommelhoff, C. Kealhofer, M. A. Kasevich, “Ultrafast electron pulses from a tungsten tip triggered by low-power femtosecond laser pulses,” Phys. Rev. Lett. 97 247402 (2006)