Hamburg 2009 – wissenschaftliches Programm

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SYDD: Defect centers in diamond for applications in quantum optics and nanophotonics

SYDD 1: Defect centers in diamond for applications in quantum optics and nanophotonics I

SYDD 1.5: Vortrag

Freitag, 6. März 2009, 12:15–12:30, Audi-B

Imaging magnetometry using single spins in diamond — •Gopalakrishnan Balasubramanian, Julia Tisler, Roman Kolesov, Fedor Jelezko, and Joerg Wrachtrup — 3. Physikalisches Institute, Universitaet Stuttgart, Germany

Single Nitrogen-Vacancy color centers in diamond are gaining popularity because of its exceptional optical and spin properties. The single spin of the defect can be manipulated optically, providing a efficient way to entangle single electron spins and couple nuclear spins qubits in diamond. Long spin coherence time of these single defects finds application as sensitive magnetic field probes. Using engineered diamond we can achieve ultrahigh sensitivity using which we will be able to detect a single external electron or nuclear spin.[1] Controlled creation of these color centers inside nanodiamonds offers diverse applications. By attaching these single spins to the tip of a scanning probe, we were able to perform sensitive scanning probe magnetometry at nanoscale.[2] Improving this device by using quantum grade diamond and synchronized NMR pulse sequences we would have the ability to perform nanoscale NMR/MRI of single molecules.

[1] Maze, J. R. et al. Nanoscale magnetic sensing with an individual electronic spin in diamond. Nature 455, 644-647(2008).

[2] Balasubramanian, G. et al. Nanoscale imaging magnetometry with diamond spins under ambient conditions. Nature 455, 648-651(2008).