Observation of the nano-scale surface dynamics of femtosecond laser ablation by time-resolved soft x-ray imaging technique

M. Nishikino, N. Hasegawa, T. Tomita, Y. Minami, R. Takei, M. Baba, T. Eyama, S. Takayoshi, T. Kawachi, D. Hatomi, N. Ohnishi, M. Yamagiwa, T. Suemoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We have developed the pump and probe soft x-ray imaging technique of the metal surfaces during the femtosecond laser ablation by using the laser-driven soft x-ray laser at the wavelength of 13.9 nm. The pumping laser used for the ablation was a Ti: Sapphire laser pulse with the duration of 80 fs pulse at a central wavelength of 795 nm, and had a Gaussian spatial profile. By using the x-ray interferometer, the time resolved image of nano-scaled ablation dynamics of the platinum was obtained. At the timing of 36 ps after the femtosecond laser irradiation, the maximum surface expansion and expansion speed were measured to be about 60 nm and 1,700 m/s, respectively. We have compared between the experimental result of the surface expansion and the profile of the ablated hole measured by the atomic force microscopy, and discussed the fluence dependence of the femtosecond laser ablation. These results lead to better understanding of the initial process of the laser ablation dynamics.

Original languageEnglish
Title of host publicationX-Ray Lasers and Coherent X-Ray Sources
Subtitle of host publicationDevelopment and Applications X
PublisherSPIE
ISBN (Print)9780819496997
DOIs
Publication statusPublished - 2013
EventX-Ray Lasers and Coherent X-Ray Sources: Development and Applications X Conference - San Diego, CA, United States
Duration: 2013 Aug 272013 Aug 29

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8849
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherX-Ray Lasers and Coherent X-Ray Sources: Development and Applications X Conference
CountryUnited States
CitySan Diego, CA
Period13/8/2713/8/29

Keywords

  • Femto-second laser abaltion
  • Pump and probe experiment
  • Soft x-ray laser interferometer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Observation of the nano-scale surface dynamics of femtosecond laser ablation by time-resolved soft x-ray imaging technique'. Together they form a unique fingerprint.

Cite this