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Latest News

Daniel Najer wins the Swiss Nanotechnology PhD award!

Daniel Najer was one of the 5 young scientists to win the Swiss Nanotechnology PhD award. The prize is awarded by the company Bühler for Daniel’s publication on an efficient light-matter interface, coupling a semiconductor QD strongly to an optical microcavity. Congratulations!

Read more here: https://nanoscience.ch/en/2020/07/15/five-awards-for-young-scientists/ 

Natasha TommDaniel Najer wins the Swiss Nanotechnology PhD award!

Strong-coupling of a semiconductor quantum dot in a microcavity

A coherent exchange of a single energy quantum between an “atom” (in our case a gated InAs quantum dot) and an optical cavity has been reported by our group in Nature. We achieve an atom-cavity Cooperativity of 150, and probe the transitions between singly and doubly excited photon-atom system using photon-statistics spectroscopy.

Natasha TommStrong-coupling of a semiconductor quantum dot in a microcavity

Correlations between optical properties and Voronoi-cell area of quantum dots

In our recent paper, we have shown that several optical properties of a quantum dot are correlated with the area of the so-called Voronoi cell surrounding it. In the image below, the Voronoi-diagram is shown in red for a few tens of quantum dots. The quantum dot positions are indicated as black dots.

Matthias LöblCorrelations between optical properties and Voronoi-cell area of quantum dots

Excitons in InGaAs quantum dots without electron wetting layer states

We have recently shown that InGaAs quantum dots can be grown without conduction band states of the so-called wetting layer. This work is the result of a collaboration with the Ruhr Universität Bochum and the Forschungszentrum Jülich. In the picture below, you see a transmission electron microscopy image of a quantum dot grown with the new technique.

Matthias LöblExcitons in InGaAs quantum dots without electron wetting layer states

Daniel Riedel wins PhD prize!

Daniel Riedel has won the Swiss Nanotechnology PhD Award 2018, an award sponsored by the Hightech Zentrum Aargau. He received the award for his publication in Physical Review X on improving the quality of the photons emitted by NV centres in diamond.

Christian Schönenberger, Daniel Riedel and Martin Bopp (Director of the Hightech Zentrum Aargau) during the award ceremony of the Swiss Nanotechnology PhD Award (Image: Edward Byrne).

Richard WarburtonDaniel Riedel wins PhD prize!
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