Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 109: Quantum dots and wires: Quantum communication and quantum information science

HL 109.3: Talk

Friday, March 20, 2015, 11:45–12:00, ER 164

Resonance Fluorescence from Quantum Dots embedded in GaAs/AlGaAs Ridge Waveguide Structures — •Mario Schwartz, Ulrich Rengstl, Matthias Paul, Michael Jetter, and Peter Michler — Institut für Halbleiteroptik und Funktionelle Grenzflächen, Allmandring 3, 70569 Stuttgart, Germany

The implementation of a logical quantum CNOT gate on-chip is one of the major goals in quantum information science. Requirements for such a gate are the generation, guiding and detection of indistinguishable single-photons on-chip. Due to photons from a QD have the best coherence properties under resonant excitation, this excitation method is a requirement for highly indistinguishable single-photons.

Here, we demonstrate resonance fluorescence (RF) of InAs QDs embedded in a GaAs/AlGaAs ridge waveguide (WG). Low propagation losses along the WG exhibit the suitability of the QD/WG system. The additional use of a weak off-resonant laser, acting as an optical gate for the RF is documented.