Results from Muller et al.. Spectra of the biexcitonic (left) and of the excitonic (right) transitions measured for vertical (V) and H polarization (H) for different tuning laser intensities I; where an intensity of I0corresponds to a Rabi frequency of Ω/2Π = 8.3 GHz. Reprinted with permission from Muller et al., Creating Polarization- Entangled Photon Pairs from a Semiconductor Quantum Dot Using the Optical Stark Effect, Phys. Rev. Lett. 103, 217402, (2009). Copyright 2009, American Institute of Physics.
Plumhof et al. Nanoscale Research Letters 2012 7:336 doi:10.1186/1556-276X-7-336