Nam Nguyen and Nadia Antoniadis both receive the QCQT Excellence Award 2023. Nam got it in recognition of his outstanding work in the publications “Enhanced Electron-Spin Coherence in a GaAs Quantum Emitter” published in PRL and  “Quantum interference of identical photons from remote GaAs quantum dots” published in Nat. Nanotechnol. Nadia got the price for her outstanding work in “Cavity-enhanced single-shot readout of a quantum dot spin within 3 nanoseconds” published in Nat. Commun. and “A chiral one-dimensional atom using a quantum dot in an open microcavity” published in npj Quantum Inf. Congratulations!!

Andrea Corazza receives two poster awards: the 2023 MRS Fall Meeting Best Poster Award and the EL14 Diamond Electronics, Devices and Sensors Best Poster Award 2023 for the poster “Diamond defects: a Gateway to Spin-Photon Interfaces”. Congratulations!

In our recent publication in Physical Review Letters, we increased the coherence of an electron spin in a GaAs quantum dot to over half a microsecond. This 150-fold improvement is achieved by using the interaction of electron spins and nuclear spins to cool the spin system. More information can be found on the SNI news.

Our latest results on ultra-fast cavity-enhanced single-shot readout of a quantum dot electron spin in 3 nanoseconds have been published in Nature Communications.

In our recent publication in Nature Physics, we directly observe a photon number dependent time-delay upon scattering of a laser pulse. This is a fingerprint of simulated emission at the level of a few photons. More information can be found in the Uni news.

Simon Geyer is selected as APS Distinguished Student (DS) for outstanding non-US young researchers. He received his prize at the APS March meeting 2023.
Congratulations!!

Clemens Spinnler receives a QCQT 2022 Excellence Award in recognition of his outstanding work to “Optically driving the radiative Auger transition”, published in Nature Comm. and “Quantum interference of identical photons from remote GaAs quantum dots” published in Nature Nano. Congratulations!!

In our most recent manuscript, published in Applied Physics Letter, we present an improved method for the creation of narrow-linewidth nitrogen-vacancy centers (NVs) in microstructured diamond. NVs are known for their exceptional spin coherence and convenience in optical spin initialization and readout, and are increasingly used both as a quantum sensor and as a building block for quantum networks. The standard method relying on nitrogen implantation to create NVs tends to create NV populations with broadened optical linewidth. The phenomenon is much aggravated when photonic structures allowing a better photon collection efficiency are created around the emitters. We demonstrate that implantation of carbon ions yields a comparable density of NVs as implantation of nitrogen ions, and that implantation after instead of before the diamond fabrication process results in NV populations with narrow optical linewidths and low charge-noise levels even in thin diamond microstructures. We measure a median NV linewidth of 150 MHz for structures thinner than 5 μm, with no trend of increasing linewidths down to the thinnest measured structure of 1.9 μm and confirm our results in multiple samples implanted with different ion energies and fluences.

Natasha Tomm has received two awards for her PhD thesis “A quantum dot in a microcavity as a bright source of coherent single photons” this year!

The first prize was the Prix Schläfli in Physics 2022, awarded by the Swiss Academy of Sciences (SCNAT). The Prix Schläfli is one of the oldest prizes in Switzerland and awards every year the best dissertations in natural sciences. Read more here.

The second one was given by the Philosophisch-Naturwissenschaftliche Fakultät of the University of Basel. Every year the Faculty awards two outstanding dissertations that have demonstrated great importance and quality of the scientific contributions.

Congratulations!!!

In our recent publication in Physical Review Letters, we experimentally and theoretically study exciton-exciton couplings in a two-dimensional semiconductor, homobilayer MoS₂. More information can be found in the SNI news or in this short explanation video.