Phonon-assisted robust and deterministic two-photon biexciton preparation in a quantum dot

Titelangaben

Bounouar, S. ; Müller, M. ; Barth, Andreas M. ; Glässl, Martin ; Axt, Vollrath Martin ; Michler, P.:
Phonon-assisted robust and deterministic two-photon biexciton preparation in a quantum dot.
In: Physical Review B. Bd. 91 (2015) Heft 16 . - 161302(R).
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.91.161302

Angaben zu Projekten

Abstract

We investigate both experimentally and theoretically a simple yet more robust and flexible alternative to Rabi oscillation-type biexciton preparation protocols traditionally used for semiconductor quantum dots. The quantum dot is excited by a strong laser pulse positively detuned from the two-photon resonance yielding an on demand initialization of the biexciton state by making use of the phonon-induced thermalization of the photon dressed states. It is shown that for excitation pulses in the picosecond range, a stable and high occupation of up to CXX=0.95±0.02 is reached. Notably, the generated photons show similar coherence properties as measured in the resonant two-photon scheme. This protocol is a powerful tool for the control of complex solid state systems combining radiative cascades, entanglement, and resonant cavity modes.