Dimensionality dependence of optical nonlinearity and relaxation dynamics in cuprates

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.

10 pages, 4 figures

References in corpus (1)

• Parity forbidden excitations of Sr2CuO2Cl2 revealed by optical third-harmonic spectroscopy

Cited by in corpus (7)

• Nonlinear Optical Response in two-dimensional Mott Insulators
• Symmetry of Photoexcited States and Large-Shift Raman Scattering in Two-Dimensional Mott Insulators
• Many-body recombination in insulating cuprates
• Impact ionization and multiple photon absorptions in the two-dimensional photoexcited Hubbard model
• Ultrafast near infrared photoinduced absorption in a multiferroic single crystal of bismuth ferrite
• Temperature and Dimensionality Dependences of Optical Absorption Spectra in Mott Insulators
• Nonlinear Optical Response Functions of Mott Insulators Based on Dynamical Mean Field Approximation