Polarization ofsingle InGaAsquantumdotsinphotonic crystal nanocavities

Polarizations oflight emissions fromsingle Ino 5Ga0 5Asquantum dots(QDs)inphotonic crystal (PC)nanocavities werestudied. Itisfound that anindividual dotcould excite different polarization direction whenplaced inthePC nanocavity withdoubly degenerated cavity modes.On thecontrary, adeterministic polarization state ofQD emission isfound whencoupled toasingle-mode PCnanocavity.