Excitonic Optical Nonlinearity in Semiconductor Quantum Spheres

Abstract

It is numerically confirmed that the third-order optical susceptibility χ(3)(ω;–ω,ω,–ω) is enhanced by the mesoscopically enhanced transition dipole moment of excitons in CuCl quantum spheres (QS's) but it is not in GaAs QS's and it is marginal for CdS QS's.