Spangenberg, DirkDirkSpangenbergNeethling, PieterPieterNeethlingRohwer, ErichErichRohwerBrügmann, Michael HeinrichMichael HeinrichBrügmannFeurer, ThomasThomasFeurer2024-10-232024-10-232015https://boris-portal.unibe.ch/handle/20.500.12422/137360Through dedicated measurements in the optical regime we demonstrate that ptychography can be applied to reconstruct complex-valued object functions that vary with time from a sequence of spectral measurements. A probe pulse of approximately 1 ps duration, time delayed in increments of 0.25 ps, is shown to recover dynamics on a ten times faster time scale with an experimental limit of approximately 5 fs.en500 - Science::530 - Physics600 - Technology::620 - Engineeringarticle10.7892/boris.749871404.7621v210.1103/PhysRevA.91.021803