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发明授权
CN107910239B 一种产生可控涡旋电子束的装置、方法 有权

一种产生可控涡旋电子束的装置、方法
摘要：
本发明公开了一种基于透射电子显微镜产生涡旋电子束的装置，电子枪，产生平面电子束；电场控制器；导电线圈，通过电学设备中的芯片设置于平面电子束通道上，受所述电场控制器作用产生强度可控的涡旋电场，所述涡旋电场用于调制所述平面电子束的相位，形成涡旋电子束。涡旋电子束可广泛应用于材料的表征、微纳尺度粒子操控等领域。本发明还提供了一种利用上述装置产生涡旋电子束的方法。该方法操作方便、经济成本低，可以获得轨道角动量可控的涡旋电子束，并且通过结合电子能量损失谱的分析，还有望实现对材料的原子级分辨磁性表征。
摘要（英）：

The invention discloses a device for generating a vortex electron beam through a transmission electron microscope. The device comprises the components of an electron gun which generates a planar electron beam; an electric field controller; and a conductive coil which is arranged in a planar electron beam channel through a chip in electric equipment and generates a vortex electric field with controllable strength through function of the electric field controller, wherein the vortex electric field is used for modulating the phase of the planar electron beam and forming the vortex electron beam.The vortex electron beam can be widely applied to the fields such as material representation and micro-nano scale particle controlling. The invention further provides a method for generating the vortex electron beam through the device of the invention. The method has advantages of convenient operation and low economic cost. The vortex electron beam with controllable orbital angular momentum can beobtained. Furthermore through analyzing an electron energy loss spectrum, atom-grade resolution magnetic characterization to the material can be realized.

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