Quantitative visualization of nanometer-scaled electromagnetic fields by a novel phase-imaging method based on small-angle electron scattering patterns

2015 Fiscal Year Final Research Report

• Project/Area Number: 26600042
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials engineering
• Research Institution: Osaka University
• Principal Investigator: Yamasaki Jun 大阪大学, 超高圧電子顕微鏡センター, 准教授 (40335071)
• Co-Investigator(Kenkyū-buntansha): SASAKI HIROKAZU 古河電気工業株式会社, 研究開発本部横浜研究所, その他 (70649821)
• Co-Investigator(Renkei-kenkyūsha): TANAKA NOBUO 名古屋大学, 未来材料・システム研究所, 特任教授 (40126876)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 回折顕微法 / 位相イメージング / 小角散乱 / 電子線

Outline of Final Research Achievements

We developed a novel electron phase-imaging method based on a small-angle scattering pattern from a material. We devised each processing method to cope with various factors preventing quantitative phase measurements, and thus succeeded in establishing the phase-imaging method which enables mapping of phase distributions of electron wave functions after passing through materials to an accuracy of about 0.1 radian. We also succeeded in demonstrating availability and versatility of our method, and superiority to the existing phase-imaging method (off-axis electron holography). We showed great capabilities for applications to quantitative measurements of electromagnetic fields in and around nanometer-scaled materials.

Free Research Field

電子顕微鏡を用いたイメージング手法の研究開発