title: Ultrafast extreme ultraviolet holography: dynamic monitoring of surface deformation.
abstract: We demonstrate femtosecond time-resolved dynamic Gabor holography using highly coherent extreme ultraviolet light generated by high harmonic upconversion of a femtosecond laser. By reflecting this light from an impulsively heated surface, we implement a simple and robust single-reflection geometry for phase-sensitive holographic detection at extreme UV wavelengths. Using this setup, we study the ultrafast deformation and subsequent acoustic oscillations within a thin metal film. These measurements exhibit subpicometer spatial sensitivity in the vertical dimension.
authors.affiliation: Department of Physics and JILA, University of Colorado and NIST, and NSF Engineering Research Center in Extreme Ultraviolet Science and Technology, Boulder, Colorado 80309-0440, USA. Ra.Tobey@colorado.edu
authors.forename: Ra'anan I
authors.initials: RI
authors.lastname: Tobey
authors.forename: Mark E
authors.initials: ME
authors.lastname: Siemens
authors.forename: Oren
authors.initials: O
authors.lastname: Cohen
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Murnane
authors.forename: Henry C
authors.initials: HC
authors.lastname: Kapteyn
authors.forename: Keith A
authors.initials: KA
authors.lastname: Nelson