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

Area of Science:

• Quantum Physics
• Electron Microscopy
• Nanofabrication

Background:

• Electron microscopy enables precise quantum experiments.
• Double-slit interference demonstrates wave-particle duality.

Purpose of the Study:

• To perform precise double-slit interference experiments with electrons.
• To visualize single electron distributions under novel conditions.

Main Methods:

• Utilized a 1.2-MV field emission electron microscope with a direct detection camera.
• Employed an asymmetric double-slit fabricated by focused ion beam.
• Operated the microscope under a "pre-Fraunhofer" condition (Fraunhofer for single slits, Fresnel for double slits).
• Conducted experiments under high-dose (probability distribution) and low-dose (single electron distribution) conditions.

Main Results:

• Achieved precise electron wave interference.
• Visualized single electron distributions under the defined "pre-Fraunhofer" conditions.
• Demonstrated distinct electron probability and single electron distributions.

Conclusions:

• The study successfully demonstrated electron interference under novel experimental conditions.
• Advanced electron microscopy and nanofabrication enable detailed visualization of quantum phenomena.
• The findings contribute to understanding electron wave behavior in interference experiments.