Letter abstract

Nature Photonics 3, 645 - 648 (2009)
Published online: 25 October 2009 | doi:10.1038/nphoton.2009.191

Subject Categories: Quantum optics | Lasers, LEDs and light sources

Photon anti-bunching in acoustically pumped quantum dots

O. D. D. Couto, Jr1, S. Lazic acute1, F. Iikawa1,2, J. A. H. Stotz3, U. Jahn1, R. Hey1 & P. V. Santos1

Although extensive research on nanostructures has led to the discovery of a number of efficient ways to confine carriers in reduced dimensions, little has been done to make use of the unique properties of various nanostructured systems through coupling by means of the controllable transfer of carriers between them. Here, we demonstrate a novel approach for the controllable transfer of electrons and holes between a semiconductor quantum well and an embedded quantum dot using the moving piezoelectric potential modulation induced by an acoustic phonon. We show that this moving potential not only transfers carriers between the quantum well and an array of quantum dots, but can also control their capture and recombination in discrete quantum dot states within the array. This feature is used to demonstrate a high-frequency, single-photon source with tunable emission energy by acoustically transferring carriers to a selected quantum dot.

  1. Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5–7, 10117 Berlin, Germany
  2. Instituto de Fïsica 'Gleb Wataghin', Unicamp, 13083-980, CP-6165, SP, Brazil
  3. Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario, K7L3N6 Canada

Correspondence to: S. Lazic acute1 e-mail: snezana@pdi-berlin.de


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