Interference experiment with asymmetric double slit by using 1.2-MV field emission transmission electron microscope.

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 Rep

journal_title

Scientific reports

authors

Harada K,Akashi T,Niitsu K,Shimada K,Ono YA,Shindo D,Shinada H,Mori S

doi

10.1038/s41598-018-19380-4

subject

Has Abstract

pub_date

2018-01-17 00:00:00

pages

1008

issue

1

issn

2045-2322

pii

10.1038/s41598-018-19380-4

journal_volume

8

pub_type

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