Ultrafast optical nonlinearity in the quasi-one-dimensional Mott insulator Sr2CuO3

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

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Abstract

The photoinduced absorption in the quasi-one-dimensional Mott insulator Sr2CuO3 in the infrared spectral region was studied. Theoretical calculations based on a two-band Hubbard model explain the experimental observations. Results indicated that the strong two-photon absorption is due to a very large dipole coupling. The potential of Sr2CuO3 for all-optical switching was demonstrated by the room temperature picosecond recovery of the optical transparency. The differential transmission was measured as a function of delay time. The relatively long-lived component of the transmission change is associated with the real excitation of the charge-transfer (CT) exciton.

Original languageEnglish (US)
Pages (from-to)2204-2207
Number of pages4
JournalPhysical review letters
Volume85
Issue number10
DOIs
StatePublished - Sep 4 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ogasawara, T., Ashida, M., Motoyama, N., Eisaki, H., Uchida, S., Tokura, Y., Ghosh, H., Shukla, A., Mazumdar, S., & Kuwata-Gonokami, M. (2000). Ultrafast optical nonlinearity in the quasi-one-dimensional Mott insulator Sr2CuO3. Physical review letters, 85(10), 2204-2207. https://doi.org/10.1103/PhysRevLett.85.2204