High harmonic spectroscopy of photochemical reaction

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13854
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Hokkaido University
• Principal Investigator: sekikawa taro 北海道大学, 工学研究院, 准教授 (90282607)
• Research Collaborator: KANESHIMA Keisuke ; NINOTA Yuki
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 高次高調波発生 / 光化学反応 / 三段階モデル

Outline of Final Research Achievements

The aim of the project is the application of high harmonic spectroscopy (HHS) to observe photochemical reaction dynamics in large molecules, such as conjugated system and biomolecules, with femtosecond or attosecond temporal resolution. HHS is the approach to investigate the electronic states of the interacting media with the laser field by observing the high harmonic yield or spatial distribution of the high harmonic beam upon photoexcitation.
In this project, the ring-opening dynamics of 1,3-cyclohexadiene was investigated by HHS. It was found that the ring opens after 400 fs upon photoexcitation. This finding is consistent with the observation by time-resolved photoelectron spectroscopy.

Free Research Field

量子エレクトロニクス