Interband two-photon transition in Mott insulator as a new mechanism for ultrafast optical nonlinearity

M. Ashida, T. Ogasawara, N. Motoyama, H. Eisaki, S. Uchida, Y. Taguchi, Y. Tokura, M. Kuwata-Gonokami, H. Ghosh, A. Shukla, S. Mazumdar

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The dimensionality dependence of optical nonlinearity in cuprates was investigated by sub-picosecond pump-probe transmission measurements in the near-infrared region. It was found that cuprates with one-dimensional Cu-O networks show nonlinearity one order of magnitude larger than that of conventional band semiconductors and picosecond relaxation of the excited state. In contrast, a two-dimensional cuprate shows one order of magnitude smaller nonlinearity and slower decay of the excited state, as well as picosecond relaxation. The possibility for application of the present material to all-optical switching devices is also discussed.

Original languageEnglish (US)
Pages (from-to)3628-3632
Number of pages5
JournalInternational Journal of Modern Physics B
Volume15
Issue number28-30
StatePublished - Dec 10 2001

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

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    Ashida, M., Ogasawara, T., Motoyama, N., Eisaki, H., Uchida, S., Taguchi, Y., Tokura, Y., Kuwata-Gonokami, M., Ghosh, H., Shukla, A., & Mazumdar, S. (2001). Interband two-photon transition in Mott insulator as a new mechanism for ultrafast optical nonlinearity. International Journal of Modern Physics B, 15(28-30), 3628-3632.