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2012 | 121 | 2 | 307-309
Article title

Femtosecond Reflection Spectroscopy in La_{1.5}Sr_{0.5}CoO_4

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EN
Abstracts
EN
Ultrafast optical response has been investigated using fs laser system on a perovskite-type cobalt oxide, La_{1.5}Sr_{0.5}CoO_4. After the photoirradiation at room temperature, the time profile of relative change of reflectance (Δ R/R) shows a sudden change within the pulse duration ( ≈ 150 fs) and decays with a lifetime of ≈ 330 fs. The sign of Δ R/R after the photoexcitation is positive in the mid-infrared region (at 0.50 eV) while negative in the visible energy region (at 2.0 eV), implying photoinduced change of the electronic structure after the photoexcitation.
Keywords
EN
Contributors
author
  • Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan
author
  • Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan
author
  • Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan
  • CREST, JST, Meguro-ku, Tokyo 152-8551, Japan
author
  • Department of Environ. Chem. and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 Japan
author
  • Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan
author
  • Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan
  • CREST, JST, Meguro-ku, Tokyo 152-8551, Japan
author
  • Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 Japan
author
  • Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 Japan
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n202kz
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