Tavabi Amir H, Boothroyd Chris B, Yücelen Emrah, Frabboni Stefano, Gazzadi Gian Carlo, Dunin-Borkowski Rafal E, Pozzi Giulio
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungzentrum Jülich, 52425, Jülich, Germany.
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Sci Rep. 2019 Jul 18;9(1):10458. doi: 10.1038/s41598-019-43323-2.
The key features of quantum mechanics are vividly illustrated by the Young-Feynman two-slit thought experiment, whose second part discusses the recording of an electron distribution with one of the two slits partially or totally closed by an aperture. Here, we realize the original Feynman proposal in a modern electron microscope equipped with a high brightness gun and two biprisms, with one of the biprisms used as a mask. By exciting the microscope lenses to conjugate the biprism plane with the slit plane, observations are carried out in the Fraunhofer plane with nearly ideal control of the covering of one of the slits. A second, new experiment is also presented, in which interference phenomena due to partial overlap of the slits are observed in the image plane. This condition is obtained by inserting the second biprism between the two slits and the first biprism and by biasing it in order to overlap their images.
量子力学的关键特征通过杨氏 - 费曼双缝思想实验得到了生动的说明，该实验的第二部分讨论了用一个孔径部分或完全封闭双缝之一时电子分布的记录。在这里，我们在配备高亮度电子枪和两个双棱镜的现代电子显微镜中实现了最初的费曼提议，其中一个双棱镜用作掩模。通过激发显微镜透镜使双棱镜平面与狭缝平面共轭，在夫琅禾费平面进行观察，对其中一个狭缝的覆盖情况进行近乎理想的控制。还提出了第二个新实验，其中在像平面中观察到由于狭缝部分重叠而产生的干涉现象。这种情况是通过在两个狭缝和第一个双棱镜之间插入第二个双棱镜并对其进行偏置以使它们的图像重叠来实现的。
