One-dimensional cuprate as a nonlinear optical material for ultrafast all-optical switching

M. Ashida, T. Ogasawara, Y. Tokura, S. Uchida, S. Mazumdar, M. Kuwata-Gonokami

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


We examine the feasibility of ultrafast all-optical switching utilizing a one-dimensional cuprate Sr2CuO3 operable within the optical fiber communication window at room temperature by using the pump-probe spectroscopy and Z-scan measurements. The strength of the interband two-photon absorption in Sr2CuO3 is much larger than that of conventional semiconductors, and is comparable to the largest reported values in π-conjugated polymers. The intensity-dependent refractive index, however, is considerably larger than that of polymeric materials. We further show that the recovery of optical transparency after the photoinjection of carriers lies within picosecond time scale. Large nonlinearity, ultrafast response, and high damage threshold make the one-dimensional cuprate a potential material for multiterabits/second rate all-optical switch.

Original languageEnglish (US)
Pages (from-to)2831-2833
Number of pages3
JournalApplied Physics Letters
Issue number19
StatePublished - May 7 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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