Abstract
Optically driven semiconductor quantum dots (QD's) are of interest in many areas of opto-electronic devices as well as featuring prominently in many proposals for quantum computing. As such, high resolution coherent nonlinear optical spectroscopy showing spectral features that are distinct from the biexcitonic features but similar to that expected for a coupled two exciton system is reported. The spectroscopic results are interpreted based on a phenomenlogical hamiltonian which is consistent with the excitons being confined but interacting in an "anti bonding" state, where the excitons are most likely separately localized.