Dimensionality dependence of optical nonlinearity and relaxation dynamics in cuprates

M. Ashida, Y. Taguchi, Y. Tokura, R. T. Clay, S. Mazumdar, Yu Svirko, M. Kuwata-Gonokami

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Femtosecond pump-probe measurements find pronounced dimensionality dependence of the optical nonlinearity in cuprates. Although the coherent two-photon absorption (TPA) and linear absorption bands nearly overlap in both quasi-one- and two-dimensional (1D and 2D) cuprates, the TPA coefficient is one order of magnitude smaller in 2D than in 1D. Furthermore, picosecond recovery of optical transparency is observed in 1D cuprates, while the recovery in 2D involves relaxation channels with a time scales of tens of picoseconds. The experimental results are interpreted within the two-band extended Hubbard model.

Original languageEnglish (US)
Pages (from-to)455-461
Number of pages7
Issue number3
StatePublished - 2002

ASJC Scopus subject areas

  • General Physics and Astronomy


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