Optical shaping of the polarization anisotropy in a laterally coupled quantum dot dimer

We find that the emission from laterally coupled quantum dots is strongly polarized along the coupled direction [1 1̅ 0], and its polarization anisotropy can be shaped by changing the orientation of the polarized excitation. When the nonresonant excitation is linearly polarized perpendicular to the coupled direction [110], excitons (X 1 and X 2 ) and local biexcitons (X 1 X 1 and X 2 X 2 ) from the two separate quantum dots (QD 1 and QD 2 ) show emission anisotropy with a small degree of polarization (10