Time-Correlation Measurement using Coherent Spin-Polarized Electron Beam

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13404
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Quantum beam science
• Research Institution: Nagoya University
• Principal Investigator: Kuwahara Makoto 名古屋大学, 未来材料・システム研究所, 准教授 (50377933)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: スピン / 強度干渉 / 量子効果 / コインシデンス

Outline of Final Research Achievements

To observe a quantum interference effect in a transmission electron microscope (TEM), an intensity correlation was performed using a coherent spin-polarized electron waves.
We have succeeded in development of a detection system for the intensity correlation in a spin-polarized TEM. The measurement system has 48.3-ps time-resolution for coincidence detection between two electrons. Using the developed detectors, we have gotten observations of anti-bunching effect and the dependence on spin-polarization. We could measure the anti-bunching rate of 10% by using the coherent spin-polarized electron beam, and also observed enhancement effect of spin-polarization slightly. Consequently, it is revealed that the anti-bunching effect includes both space charge effect and second-order interference effect.

Free Research Field

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