Regensburg 2013 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 13: Imaging

BP 13.6: Vortrag

Dienstag, 12. März 2013, 11:00–11:15, H44

Magnetic spin imaging at ambient conditions — Steffen Steinert¹, •Florestan Ziem¹, Andrea Zappe¹, Nicolas Götz¹, Liam Hall², Lloyd Hollenberg², and Jörg Wrachtrup¹ — ¹3. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany — ²School of Physics, University of Melbourne, Victoria 3010, Australia

A variety of magnetic imaging and sensing methods exist, including NMR, SQUIDs, atomic vapors and magnetic resonance force microscopy. While NMR is a standard technique for imaging in living organisms and the other techniques achieve sensitivities down to single spins, currently no technique combines few spin sensitivity, sub-micron spatial resolution and ambient operational conditions. Negatively charged nitrogen-vacancy centers (NVs) in diamond are promising candidates to fill this gap. Since the spin state of the atomic-sized defect can be optically polarized and read out, NV centers allow for high resolution magnetic sensing via Zeeman-shift, spin precession and relaxometry. We employ an ensemble of implanted NVs for wide-field magnetic sensing and imaging. Applications to microfluidic spin detection and magnetic spin imaging with diffraction limited resolution are presented. Several spin species are analyzed in regard to their possible application as magnetic sensing markers.