Construction of the energy tunable fs laser for time-resolved photoemission electron microscopy with time, space, and energy resolution

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K17677
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: FUKUMOTO Keiki 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 研究員 (20443559)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 半導体 / 超高速現象 / イメージング

Outline of Final Research Achievements

In this study, we applied for improvement of the optical system for the purpose on imparting the energy resolution to time-resolved photoemission electron microscopy which can observe the photogenerated carrier dynamics on a semiconductor surface with high spatio-temporal resolution. However, unexpected results has been obtained. Using the constructed energy tunable system ranging from 2.8 to 6 eV, it was possible to suppress sample charging, which is a serious problem on the measurements of photogenerated carrier lifetimes in wide-gap semiconductors. Wide gap semiconductors are expected materials for post Si. The equipment developed in this application research was expected as a novel technique to evaluate semiconductor properties and joint researches with several semiconductor companies have started.

Free Research Field

半導体光物性