Friday, 02 May, 2008
Optically induced hybridization of a quantum dot state with a filled continuum
P.A. Dalgarno, M. Ediger, B.D. Gerardot,J.M. Smith, S. Seidl, M. Kroner, K. Karrai, P.M. Petroff, A.O. Govorov, R.J. Warburton - Phys. Rev. Lett. 100, 176801 (2008)
We present an optical signature of a hybridization between a localized quantum dot state and a filled continuum. Radiative recombination of the negatively charged trion in a single quantum dot leaves behind a single electron. We show that in two regions of vertical electric field, the electron hybridizes with a continuum through a tunneling interaction. The hybridization manifests itself through an unusual voltage dependence of the emission energy and a non-Lorentzian line shape, features which we reproduce with a theory based on the Anderson Hamiltonian.