Probing the ladder of dressed states and nonclassical light generation in quantum-dot–cavity QED

We investigate the photon-induced tunneling phenomena in a photonic crystal cavity containing a strongly coupled quantum dot and describe how this tunneling can be used to generate photon states consisting mainly of a particular Fock state. Additionally, we study experimentally the second-order autocorrelation g²(0) in the photon-induced tunneling regime as a function of the frequency and the power of the probe laser and observe signs of higher manifolds of the Jaynes-Cummings Hamiltonian in the frequency-dependent photon statistics of the transmitted light, as well as the strong power dependence of g²(0), distinguishing this effect clearly from bunching occurring in a thermal light source.