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Dr. Friedemann Reinhard

Courses and Dates

Title and Module Assignment
Quantum Sensing Assigned to modules:
HS 2 Reinhard, F.
Assisstants: Braunbeck, G.Irber, D.Joas, T.
Thu, 13:00–14:30, WSI S101

Offered Bachelor’s or Master’s Theses Topics

Aufbau eines Diamant-Magnetometers

Red fluorescent diamonds can serve as highly sensitive magnetic field sensors. Their operation is based on spectroscopy of a microwave transition in the Nitrogen-Vacancy (NV) color center - the defect causing diamonds to have a red color. Large diamonds doped with NV centers could provide magnetic field sensors with a sensitivity comparable to the best existing sensors, which are based on superconducting circuits ("SQUIDs"). They could enable measurements of currents in a human brain by accessing their tiny magnetic stray field.

We are looking for a person to construct such a device in our laboratory. Your work will consist in design of a benchtop-scale  setup for microwave and optical spectroscopy of millimeter-sized diamonds, as well as proof-of-principle measurements to benchmark the resulting sensitivity. 

suitable as
  • Bachelor’s Thesis Physics
Supervisor: Friedemann Reinhard
Finite-Elemente-Simulation von Nano-Elektromagneten

Our group is developing nuclear magnetic resonance imaging scanners, reminiscent of the MRI machines found in hospitals. In contrast to clinical machines our devices can access much smaller samples, down to single molecules. Imaging of these tiny objects requires strong magnetic field gradients, which we typically create by nano-fabricated conductors serving as electro-magnets. 

One important issue in these devices is heating and thermal expansion of the conductors, which degrades the quality of the MRI imaging. So far we have been relying on trial-and-error to assess the impact of this effect. 

Your task will be to put this research on a more solid foundation, by developing numerical models for current and thermal flows in nanoscale conductors. If things work out well, you might also be able to validate the results of your models by measurements on a real chip-scale MRI device. 

suitable as
  • Bachelor’s Thesis Physics
Supervisor: Friedemann Reinhard
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