title: Robust quantum dot exciton generation via adiabatic passage with frequency-swept optical pulses.
abstract: The energy states in semiconductor quantum dots are discrete as in atoms, and quantum states can be coherently controlled with resonant laser pulses. Long coherence times allow the observation of Rabi flopping of a single dipole transition in a solid state device, for which occupancy of the upper state depends sensitively on the dipole moment and the excitation laser power. We report on the robust population inversion in a single quantum dot using an optical technique that exploits rapid adiabatic passage from the ground to an excited state through excitation with laser pulses whose frequency is swept through the resonance. This observation in photoluminescence experiments is made possible by introducing a novel optical detection scheme for the resonant electron hole pair (exciton) generation.
authors: Université de Toulouse, INSA-CNRS-UPS, LPCNO, Toulouse, France.
authors: C-M
authors: CM
authors: Simon
authors: T
authors: T
authors: Belhadj
authors: B
authors: B
authors: Chatel
authors: T
authors: T
authors: Amand
authors: P
authors: P
authors: Renucci
authors: A
authors: A
authors: Lemaitre
authors: O
authors: O
authors: Krebs
authors: P A
authors: PA
authors: Dalgarno
authors: R J
authors: RJ
authors: Warburton
authors: X
authors: X
authors: Marie
authors: B
authors: B
authors: Urbaszek