Development of time-resolved photoelectron spectroscopy using ultrashort deep and vacuum ultraviolet pulses

2014 Fiscal Year Final Research Report

• Project/Area Number: 25620012
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical chemistry
• Research Institution: Kyoto University
• Principal Investigator: HORIO Takuya 京都大学, 理学(系)研究科(研究院), 助教 (40443022)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 超高速分光 / 励起状態ダイナミクス / 光電子分光 / 真空紫外極短パルス / イメージング

Outline of Final Research Achievements

Using a Ti:Sa amplifier and filamentation non-linear optics, we have succeeded in simultaneous generation of ultrashort pulses at the center wavelengths of 264, 198, 159, and 133 nm. Transform-limited pulse widths estimated from the observed spectra are found to be less than 10 fs. We measured cross-correlation traces between 198 and 159 nm, and 198 and 133 nm, and found that the observed traces exhibit a Gaussian distribution with a full width at half maximum of 18 fs. The sub-20 fs time-resolution is unprecedented in the corresponding wavelength regions. We have successfully applied this light source to time-resolved photoelectron imaging and observed ultrafast photodissociation reaction of carbon disulfide in real time.

Free Research Field

反応動力学