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

Preprint

25 May 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0105502

Abstract

We present the first study of nonlinear optical third harmonic generation in the strongly correlated charge-transfer insulator Sr2CuO2Cl2. For fundamental excitation in the near-infrared, the THG spectrum reveals a strongly resonant response for photon energies near 0.7 eV. Polarization analysis reveals this novel resonance to be only partially accounted for by three-photon excitation to the optical charge-transfer exciton, and indicates that an even-parity excitation at 2 eV, with a_1g symmetry, participates in the third harmonic susceptibility.

Keywords

OPTICAL THIRD HARMONIC
FORBIDDEN EXCITATIONS
SR2CUO2CL2 REVEALED
NONLINEAR OPTICAL
PARITY FORBIDDEN
EXCITON
CHARGE
PHOTON

All Related Versions

Version 1, 2001-05-25, ArXiv
Published version: Physical Review Letters, 87 (12), 127006.

This publication has 0 references indexed in Scilit: