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ResearchVan Swinderen Institute

Dr. V. Zwiller, Kavli Institute of Nanoscience, Delft University of Technology: Hybrid systems based on quantum dots


07 June 2012 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Val Zwiller
Affiliation: Kavli Institute of Nanoscience, Delft University of Technology
Title: Hybrid systems based on quantum dots
Date: 07-06-2012
Start: 16.00 (Doors open and coffee available at 15.30)
Location: FWN-Building 5111.0080
Host: Maria Loi


Two types of hybrid quantum systems will be presented: quantum dot-atomic vapour systems and plasmonic-superconducting systems. Devices based on semiconducting nanowires quantum dots for light generation and detection will also be presented.

Using specially designed GaAs/AlGaAs quantum dots, we demonstrate coupling of the emission from a single quantum dot to a rubidium vapour, enabling the combination of solid state and atomic systems. Our hybrid artificial-natural atoms systems enable experiments such as slow light at the single photon level, frequency locking of a single quantum dot to counteract spectral wandering, to make a set of quantum dot indistinguishable in their emission and quantum memories where light generated by a quantum dot could be stored in an atomic vapor.

By coupling plasmonic waveguides with superconducting detectors, we demonstrate on-chip detection of single plasmons. We have used this direct detection scheme in an experiment where a plasmonic beamsplitter is coupled to two single Plasmon detectors and demonstrated Hong-Ou-Mandel interference with pairs of indistinguishable plasmons at a length scale far below the diffraction limit.

We will also present results on devices based on semiconducting nanowires, where light generation and detection at the single photon level is possible with quantum dots in nanowires.

Last modified:12 September 2014 11.21 a.m.