Figure 4

Theoretical investigations by Singh et al.[40] on the influence of uniaxial stress on the FSS. (a) Energy of the two bright excitons confined in lens-shaped InAs QDs vs. applied stress; the states show a crossing, i.e., zero FSS can be reached. (b) Energy of bright excitons confined in a lens-shaped InGaAs QD vs. applied stress; both states show an anticrossing. The insets show how the orientation of the linear polarization is changed if the magnitude of the stress along the [110]-direction is varied. Reprinted figure with permission from R. Singh and G. Bester, Lower Bound for the Excitonic Fine Structure Splitting in Self-Assembled Quantum Dots, Phys. Rev. Lett. 104, 196803, (2010). Copyright 2010, American Institute of Physics.