Theoretical study on attosecond and femtosecond atomic photoionization

2015 Fiscal Year Final Research Report

• Project/Area Number: 25286064
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Tokyo
• Principal Investigator: Ishikawa Kenichi 東京大学, 工学(系)研究科(研究院), 教授 (70344025)
• Co-Investigator(Kenkyū-buntansha): SATO Takeshi 東京大学, 大学院工学系研究科, 特任講師 (30507091)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: アト秒科学 / 極紫外自由電子レーザー / 第一原理計算

Outline of Final Research Achievements

Using direct simulation of the time-dependent Schrodinger equation, we have studied the progress of photoionization and the interplay between different ionization paths. Upon inner-shell ionization, “Attosecond knock-up”, where the outgoing continuum electron collides with the remaining outer electron, depends on pulse polarization. Upon near-threshold EUV+IR two-photon ionization, the competition between resonant and nonresonant paths leads to striking pulse-delay dependence of photoelectron angular distribution. Thus, out study has revealed various possibilities to control photoionization processes.

Free Research Field

光量子科学