Dimensionality dependence of optical nonlinearity and relaxation dynamics in cuprates

2001/03/10 by M. Ashida, M Ashida, Y. Taguchi +11 · 3 citations
Engineering · Physics and Astronomy · #Nonlinear Optical Materials Studies #Nonlinear Photonic Systems #Photorefractive and Nonlinear Optics #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1209/epl/i2002-00660-6

10 pages, 4 figures

arxiv created 2001/03/10 · openalex publication_date 2002/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

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.

Citations

• Nonlinear optical response and spin-charge separation in one-dimensional Mott insulators

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