[18p-231C-1~19] 3.1 Basic optics and frontier of optics

△ [18p-231C-2] Holographic grating for electron beam by laser interference processing II

〇Yuuki Uesugi¹, Ryota Fukushima¹, Shunichi Sato¹ (1.IMRAM, Tohoku Univ.)

Keywords:laser interference processing, holographic diffraction grating, electron vortex

Recently, electron beams having a structured wavefront such as a vortex have attracted attention in the field of electron optics; those beams are generated using holographic gratings. In the conventional fabrication method using a focused ion beam, however, it takes time and is expensive to make such diffraction gratings. In this presentation, we will show a novel method using femtosecond-laser interference processing, which can make a large-size grating by single-shot processing. The result of characteristic evaluation of the gratings will be also introduced.