Compressed Ultrafast Femtography by Coded-Aperture Sweeping

Single-shot real-time femtophotography has surged as a crucial tool for imaging ultrafast dynamics during their times of occurrence. However, most existing methods limit imaging speed or degraded data quality by the deployed optoelectronic devices. To overcome these limitations, we propose swept-coded aperture real-time femtophotography (SCARF) that enables, in an all-optical fashion, records of ultrafast events with a full-sequence encoding of up to 156.3 THz and a sequence depth of up to 132. We use SCARF to image ultrashort pulses through transparencies and ultrafast absorption in a semiconductor.