Evaluation of oscillator strength in colloidal CdSe/CdS dots-in-rods

The oscillator strength in CdSe/CdS colloidal dot-in-rods is evaluated and assessed to be of ~1.5. On the basis of this finding, the possibility to reach the strong coupling regime with photonic crystals nanocavities is discussed. In spite that carefully choosing the cavity parameters the strong coupling regime could be analytically achieved at room temperature, theoretical considerations show that the typical Rabi doublet cannot be resolved. The work draws also a viable strategy toward the observation of the strong coupling at cryogenic temperatures.