Strong-field ultra-high resolution Fourier transform spectroscopy of molecules and molecular complexes

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H00371
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: Yamanouchi Kaoru 東京大学, 大学院理学系研究科(理学部), 教授 (40182597)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 原子・分子分光 / 強光子場科学

Outline of Final Research Achievements

We have improved the precision of the measurements of level energies of atoms and molecules by two orders of magnitude by strong-field ultrahigh resolution Fourier transform (SURF) spectroscopy, developed by our group, by using a long-arm interferometer newly constructed in the present project and demonstrated that the ppb (parts per billion) level accuracy can be achieved by SURF spectroscopy.

Free Research Field

基礎化学、物理化学

Academic Significance and Societal Importance of the Research Achievements

強レーザー場超高分解能フーリエ変換(SURF)分光法は、従来では計測の困難であった無極性分子・分子イオンの回転・振動数を高精度で決定することが出来るため、SURF分光法の幅広い応用が期待されている。本研究では、SURF分光法の精度を2桁高めるとともに、原子・分子の振動分光を行うことによって、先行研究よりも飛躍的に高い精度でエネルギー準位の決定を行った。