Abstract:
:Advanced electron microscopy technologies have made it possible to perform precise double-slit interference experiments. We used a 1.2-MV field emission electron microscope providing coherent electron waves and a direct detection camera system enabling single-electron detections at a sub-second exposure time. We developed a method to perform the interference experiment by using an asymmetric double-slit fabricated by a focused ion beam instrument and by operating the microscope under a "pre-Fraunhofer" condition, different from the Fraunhofer condition of conventional double-slit experiments. Here, pre-Fraunhofer condition means that each single-slit observation was performed under the Fraunhofer condition, while the double-slit observations were performed under the Fresnel condition. The interference experiments with each single slit and with the asymmetric double slit were carried out under two different electron dose conditions: high-dose for calculation of electron probability distribution and low-dose for each single electron distribution. Finally, we exemplified the distribution of single electrons by color-coding according to the above three types of experiments as a composite image.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Harada K,Akashi T,Niitsu K,Shimada K,Ono YA,Shindo D,Shinada H,Mori Sdoi
10.1038/s41598-018-19380-4subject
Has Abstractpub_date
2018-01-17 00:00:00pages
1008issue
1issn
2045-2322pii
10.1038/s41598-018-19380-4journal_volume
8pub_type
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