Development of a characterization method for attosecond pulses by photoelectron interferometry

点击翻译按钮获取中文摘要

The bandwidth of high harmonics, including attosecond pulses, is very broad. Because the broad bandwidth is too broad for spectroscopy, it is necessary to take out the adequate spectrum to target samples. In the present study, we have developed the time-compensated monochromator to take out a single harmonic and characterized the temporal width and the spatial distribution of the selected harmonic pulses. Consequently, we found that the pulse duration of the 21st harmonic (photon energy 33 eV) was 11 fs and that the spatial diameter of the beam at focus was 57 μm.