Studies of the production of electron vortex beams and their interaction with chiral materials

1)用于电子束的叉形光栅和螺旋波带片被纳米加工并引入电子显微镜。我们证实，引入电子显微镜聚光透镜系统的螺旋波带片产生了轨道角动量为90 h的电子涡旋束。2)利用两束不同轨道角动量的涡旋电子束进行了杨氏双缝实验。 证实了两束涡旋电子束相互干涉，而与它们的轨道角动量无关。3)我们证实了分叉光栅不仅传输线（横）动量，而且传输轨道角动量。4)利用电子涡旋束对沉积在石墨烯和氮化硅薄膜上的纳米粒子进行辐照，研究电子涡旋束对纳米粒子的操控。

1) Forked gratings and spiral zone plates for electron beams were nano-fabricated and introduced into electron microscopes. We confirmed that a spiral zone plate introduced into the condenser lens system of an electron microscope produced an electron vortex beam carrying an orbital angular momentum of 90h. 2) Young's double slit experiment was conducted using two electron vortex beams with different orbital angular momenta. It was confirmed that the two electron vortex beams are interfered with each other irrespective of their orbital angular momenta. 3) We confirmed that a forked grating transfers not only linear (transverse) momentum but also orbital angular momentum. 4) Electron vortex beams were illuminated to nano particles deposited on graphene and Si3N4 thin files to study the manipulation of the nano particles using the electron vortex beams.