Speaker
Description
We report the attosecond optical shaping of electron beams using thin membranes in a newly developed apparatus capable of delivering high-current pulses. To record attosecond streaking spectrograms, we minimize the spread of electron-light delays in the streaking interaction by optimizing the membrane arrangement. The recorded spectrograms exhibit net acceleration and deceleration, as well as monochromatization and energy broadening, all controlled on sub-femtosecond timescales. Through comparison with theoretical models, we estimate the durations of the bunched electrons to be 1.3 fs (FWHM) and 0.5 fs (RMS). Furthermore, we demonstrate the attosecond modulation of pulsed beams with a large energy spread. Our results represent a significant step toward the realization of an attosecond pulse containing one or more electrons.