Speaker
Description
Ultrafast electron diffraction (UED) enables atomic-scale structural imaging, yet achieving attosecond temporal resolution is limited by finite electron bunch durations and intrinsic pump–probe timing jitter. We propose a THz-streaking scheme that overcomes these limitations using a high-gradient (~1 GV/m) THz deflecting cavity. In this approach, THz fields streak a femtosecond diffraction pattern and map temporal evolution onto the detector’s spatial axis. This process enables attosecond-scale temporal information to be extracted in a single-shot measurement without requiring sub-femtosecond electron pulses. Preliminary simulations confirm its feasibility, demonstrating that attosecond temporal resolution can be decoupled from electron bunch duration and timing jitter, pushing streaking-based UED into the attosecond regime.
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