2019/04/17 2 open PostDoc positions

We have 2 open PostDoc positions to be filled as soon as possible

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We are looking forward to your application.

2019/02/15 Two new manuscripts published

We have published our research results in 2 new manuscripts: Philipp's work on diamond nanopillars has appeared in New Journal of Physics.  Find the paper here.

Jointly with our cooperation partners in Augsburg (group Dr. Matthias Schreck and AuDiaTec GmbH), we have investigated single crystal diamond that can be grown in sizes up to 10 cm. In this wafer scale diamonds, we habe for the first time investigated single NV centers and detected a quite unstrained diamond lattice.

Read the paper at APL materials.

Congrats to all contributers for the great work!

2018/08/11 Novel findings on diamond nanopillars on Arxiv

Our manuscript on the optimization of diamond nanopillars has been published on the Arxiv preprint server. We use simulations to investigate the optimal geometra of scanning probes based on diamond nanowires.

Find the paper here

2018/07/15 New team members

We are happy to welcome new team members: Nimba Oshnik Pandey joins us as a new PhD student in the EU project QuSco. Victoriia Gasanova joins our research activities on SiC as a research assistant and Lara Render undertakes her project internship in our group. Welcome and all the best!

2018/06/08 Award for lecture evaluation

Our group has been awarded the best lecture evaluation for the lectures modern optics and experimental physics 4a (introduction to solid state physics). Thanks to everone who contributed to the success of the lectures. We are very happy that our commitment has been positively valued.

2018/06/01 Our paper on SiV centers in diamond pyramids has been published

Our work on SiV centers in diamond pyramids has been published in AIP advances.

Find the paper here.

2018/04/26 2 open positions for research assistants

We have 2 open positions for research assistants for students with a Bachelor degree to be filled as soon as possible.

Both positions deal with single defects in silicon carbide as well as nanostructures manufactured from silicon carbide.

Click here for more information. Interested in the position? Contact Mariusz Radtke (contact details click here) Elke Neu-Ruffing (contact details here).

2018/04/16 New manuscript on SiV centers in diamond pyramids

In 2016, we worked on nitrogen vacancy (NV) color centers in diamond pyramids. Recent work on these diamond nanostructures to which Elke Neu contributed, investigates silicon vacancy (SiV) color centers in these structures. The SiV color centers show remarkably narrow emission lines and a low level of influence of crystal strain. Consequently, they are highly-interesting for experiment in the field of quantum technologies.  View the preprint on Arxiv.

2018/03/26 Our paper on the etching of thin diamond membranes has been published

For the scanning probes that we want to use in our group, we need diamond membranes with a thickness in the few micrometer range. In our newest paper, we describe an improved process which allows us to thin down 50 micrometer thick diamond plates. We use a dry-etching plasma with argon, SF6 and oxygen and a specially designed etch masks. We obtained the published results in a collaboration with our colleagues from Basel University.

Congratulation to all authors!

Find the Paper (open access) here.

2018/03/06 PhD position in the EU network QuSCO

We are still hiring a PhD student. Application deadline is April 8.

Find the job advertisement here.

2018/01/01 Our team is changing

With the new year or shortly before new year or team has been changing:
Alexander Meyer has finished his master thesis. We wish you all the best for your new challenges in industry!
Ettore Bernardi has left our group in november. We wish you all the best for your future career.

We are also happy to welcome two new team members: Abdallah Slablab and Mariusz Radtke have recently joined our team as PostDocs. We are looking forward to a succesful collaboration!

2017/11/01 EU-Network Qusco starts

We participate in the EU Marie Curie training network Qusco. Goal of the network is to use methods of optimal contral for quantum sensing.

Find the network'S homepage here.

Within this network, we are currently recruiting a PhD student (m/f). See here the job advertisment.

2017/09/01 Paper on Cavity Coupling of NV centers published

Phys Rev X published this week a paper of the Quantum Sensing Group in Basel to which Elke Neu contributed. Using Fabry Perot Micro resonators, we were able to efficiently create coherent photons from NV centers. Coherent photons are central for many quantum technologies.


Here is the original publication

2017/04/28 Review article published

Our review article on nanoscale sensing wih color centers in diamond has been published. Congratulation to all authors! The article is published open access and  is available here. 

2017/04/05 Fellowship from the Daimler and Benz foundation

The Daimler and Benz foundation funds our research on the "diamond nanocompass" with 40.000€ via their Post/Junior Research Group fellowship.

Find the press release (in German) here:  http://www.uni-saarland.de/nc/aktuelles/artikel/nr/17128.html

2017/04/03 Guest Scientists from Prague

Alexander Kromka, Marian Varga und Stepan Potocky visit our group.  The scientists from the institute for physics of the ASCR work on diamond growth. Within a two week short term scientific mission in the EU-COST project "nanoscale quantum optics", we investigate nanodiamonds containing SiV centers together with Stepan. Good luck for your experiments!

2016/11/09 New paper on diamond scanning probes

In a cooperation with the Tallinn University of Technology and the diamond scanning probe specialists at Artech Carbon, we have investigated commercially available, single crystal diamond scanning probes. The pyramidal diamond tips contain lots of NV centers and close to the apex SiV centers and show moderate coherence times. Thus, in the future also commercially available probes might be interesting as tools for sensing.  Paper at APL

2016/10/25 We welcome new team members

In october,  Michel Challier and Alexander Meyer Teil join our team.  Michel Challier enforces our nanofabrication of diamond project. Alexander Meyer will work on scanning probe imaging with diamond during his master projet. Welcome!

2016/08/02 Two new publications on diamond sensors

Fabricating single crystalline diamond scanning probes that are mandatory for high-resolution, high-sensitivity measurements is a complex task. We present the underlying technology in a recent publication in Review of Scientific instruments (View the paper at RSI (open access)). In this work, we used the scanning probes to map the magnetic field of nickel-nanorods with high precision,  (see displayed fig. from P. Appel et al RSI 87, 063703 (2016), ccby3.0). The work has been carried out in an collaboration between Basel University and Saarland University. 

Work of the Quantum Sensing Group in Basel, in which E. Neu participated, on cryogenic temperature NV magnetometry has been published in Nature Nanotechnology. Congrats on that! The press release of Basel University on the imaging of magnetic fields in Superconductors can be found here. And the paper can be found here.

2016/02/16 Diamond Nanoislands

Our work on the growth of diamond nanoislands on iridium has been published in Applied Physics Letters. The research has been a collaboration of the universities of Basel, Augsburg and Saarbrücken. Find the paper here.

2015/11/30 2 new papers on Arxiv

NV centers in diamond have been used to image vortices in superconductors in the Quantum Sensing Group in Basel. Using this extension of diamond NV magnetometry towards cryogenic temperatures, the investigation of novel exciting phenomena is at hand. View the paper at Arxiv

Regular arrays of diamond nanostructures are ideal to investigate single color centers: single color centers can be easily identified and re-identified whereas the nanostructures allow for  efficient light collection. So far we have been creating diamond nanostructures using the etching of synthetic diamond. In a new approach, we grow the nanostructures directly on iridium substrates. The work is a collaboration between the universities in Basel, Augsburg and Saarbrücken.  View the paper at Arxiv

2015/11/15 Ettore Bernardi joins the project DiaNanoRa as a PostDoc

 Ettore Bernardi from the University of Torino joins the DiaNanoRa project. He will focus on working with our new setup for sensing using color centers in diamond. Here he will especially apply his experience from scanning probe microscopy for life science and diamond biosensors.  (Personal Page) Welcome, Ettore!

2015/11/05 Color Centers in diamond detect microwave fields with nanometer precision

NV center spins can not only detect static but also oscillating magnetic fields. This property has been harnessed to image the magnetic field surrounding a microwave stripline with nanometer precision. The technique might in the future help to investigate microwave currents and field in various microwave components and thus help to improve these components.  The work of the Quantum Sensing Group in Basel to which Elke Neu contributed can be found here.

2015/11/05 2 new co-workers join the project

We welcome Richard Nelz (personal page) as PhD student in our project. Richard will work on assembling all the devices in the lab into a working setup. With some delay, we also welcome Amandeep Kaur (personal page), she is going to concentrate on numerical simulations of our diamond structure.

2015/08/26 Fast Track fellowship for Elke Neu

Fast Track is a career advancement program of the Robert Bosch foundation, yearly funding 20 PostDoc all over Germany. The program includes soft skill seminars, strategic networking and a financial benefit of 2400 €. German press release of the university.

2015/08/18 Selda Sonusen joins the DiaNanoRa project as a PostDoc

Selda Sonusen (Sabanci University in Instanbul) joins the team as a PostDoc in the DiaNanoRa project. She will focus on the fabrication of diamond nano scanning-probes. On this topic she will apply the experience from her PhD project on Scanning Hall-probes e.g. bases on graphene.  (Personal Page) Welcome Selda!

2015/08/06 Quantum states in a nanoobject manipulated using mechanical devices

Source: Basel University

The renowned scientific journal Nature Physics publishes this week a work from the  Quantum Sensing Group in Basel to which Elke Neu contributed. Using single crystal diamond cantilevers, we developed a novel device integrating a quantum system (the electron spin of a color center in diamond) with a mechanical oscillator. We show that using the mechanical oscillator, we are able to coherently manipulate the embedded electron spin without the need for external antennas or complex microelectronic structures.

Find the original publication here

Press release Basel University (in german)



2015/03/23 Color centers in diamond controlled using mechanical oscillation

Using the oscillation of a cantilever, we were able to manipulate the electron spin of an NV center. In this hybrid system of spin and oscillator, spin states can even be protected from decoherence. The work of the Quantum Sensing Group in Basel in which Elke Neu actively participated can be found here.

2015/02/01: Project "DiaNanoRa" starts

Funded by the German Ministry of Education and Research, within the NanoMatFutur Call the project "DiaNanoRa" starts at Saarland University. Goal of the project is to investigate and apply Diamond Nano Scanning Probes.