Walter Schottky Institute
Center for Nanotechnology and Nanomaterials

Quantum Sensing group - Research

[Reinhard 6] Research in our group focuses on quantum sensors and their applications, with a particular focus on applications in the life sciences. The core tool for this work is the nitrogen-vacancy (NV) center in diamond, a color defect whose spin sublevels can be initialized and read out optically. This center serves as an atomic-size quantum sensor to measure magnetic and electric fields. It could enable numerous applications ranging from NMR spectroscopy of single molecules to sensing of neuronal action potentials.

Currently, our group works on the following projects

Nuclear magnetic resonance spectroscopy on single molecules

[Reinhard 7] A single color center in diamond is sufficiently small and sensitive to detect nuclear magnetic resonance signals of single molecules. This has been shown in several recent proof-of-principle studies. We aim at transforming this result from a proof-of-principle-experiment to a routine technique to image single molecules in their native environment. Such a technique could provide breakthrough insights for materials science, statistical physics or biochemistry.

T. Häberle et. al, arXiv:1406.3324
T. Staudacher et al., Science 339, 561 (2013)

Electric control of color centers in a diamond semiconductor device

[Reinhard 8] In a past project, we have switched NV centers into different ionization states by embedding them into a diamond field effect transistor device. Future extensions of this technique could lead to electric readout of color centers or imaging voltage sensors.

B. Grotz et al., Nature Comm. 3, 729 (2012)
M. Hauf et al., Phys. Rev. B, 83, 081304 (2011)

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