Independent contribution of optical attenuation length in ultrafast laser-induced structural change

Tatsunori Shibuya*, Kazuyuki Sakaue, Hiroshi Ogawa, Daisuke Satoh, Thanh Hung Dinh, Masahiko Ishino, Masahito Tanaka, Masakazu Washio, Takeshi Higashiguchi, Masaharu Nishikino, Akira Kon, Yuya Kubota, Yuichi Inubushi, Shigeki Owada, Yohei Kobayashi, Ryunosuke Kuroda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Although laser irradiation with femtosecond pulses is known to generate crystallization and morphological changes, the contribution of optical parameters to material changes is still in discussion. Here, we compare two structures irradiated near Si–L2,3 edges by an extreme ultraviolet femtosecond pulse. Our result implies that, despite the femtosecond irradiation regime, these values of the optical attenuation length between the wavelengths of 10.3-nm and 13.5-nm differ by one order of magnitude. From the structural comparison, the original crystalline state was maintained upon irradiation at 13.5-nm, on the other hand, transition to an amorphous state occurred at 10.3-nm. The difference in optical attenuation length directly influence to the decision of material crystallization or morphological changes, even if the irradiation condition is under the femtosecond regime and same pulse duration. Our result reveals the contribution of optical attenuation length in ultrafast laser-induced structural change.

Original languageEnglish
Pages (from-to)33121-33133
Number of pages13
JournalOptics Express
Volume29
Issue number21
DOIs
Publication statusPublished - 2021 Oct 11

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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