PL spectra in a weak coupling regime
(mode attraction).
PL color map in a strong coupling regime
(disappearance of Rabi splitting with anti-crossing dispersion).


Cavity Quantum Electrodynamics Using Single Quantum Dot

We fabricate a photonic crystal nanocavity with a single quantum dot (QD), and investigate the interaction between a single exciton (X) and the cavity mode (C), namely the effect of cavity quantum electrodynamics (cQED). In a weak X-C coupling regime, we observe an unusual mode attraction between X and C. Moreover, we find that Rabi splitting disappears while anti-crossing dispersion is maintained in a strong coupling regime. These are novel cQED effects that arise from the large exciton dephasing of the solid-state two-level system. (Page 39)