Towards Molecular Structure Microscopy using Single Spins in Diamond
Dr. Gopalakrishnan Balasubramanian (Max-Planck-Institut für biophysikalische Chemie, Göttingen)

Understanding magnetism at the nanoscale is a frontier research topic that has profound and broad impact covering fundamental physics to space technologies. The spins associated with Nitrogen-Vacancy(NV) centres in diamond has some unique advantages as a nanoscale magnetic sensor [1,2]. Among the several applications, I will introduce the need for imaging single biomolecule and the prospects of an NV spin magnetometer for developing such a molecular structure microscope [3,4]. I will present some developments and challenges in NV based sensing and imaging. The talk will cover aspects of Nanoscale magnetic sensing [5], Spin noise spectroscopy [6], Dynamical decoupling, High Fidelity schemes [7], Quantum controls [8], Nanoscale NMR/MRI [9] and Tomographic reconstruction [10].

References:
[1] Taylor, J. M. et al. High-sensitivity diamond magnetometer with nanoscale resolution. Nat. Phys. 4, 810–816 (2008).
[2] Maze, J. R. et al. Nanoscale magnetic sensing with an individual electronic spin in diamond. Nature 455, 644–647 (2008).
[3] Degen, C. Nanoscale magnetometry: Microscopy with single spins. Nat Nano 3, 643–644 (2008).
[4] Balasubramanian, G. et al. Nanoscale imaging magnetometry with diamond spins under ambient conditions. Nature 455, 648–651 (2008).
[5] Balasubramanian, G. et al. Ultralong spin coherence time in isotopically engineered diamond. Nat. Mater. 8, 383–387 (2009).
[6] Staudacher, T. et al. Nuclear magnetic resonance spectroscopy on a (5-nanometer)3 sample volume. Science 339, 561–563 (2013).
[7] Arroyo-Camejo, S., Lazariev, A., Hell, S. W. & Balasubramanian, G. Room temperature high-fidelity holonomic single-qubit gate on a solid-state spin. Nat Commun 5, (2014).
[8] Lazariev, A., Arroyo-Camejo, S., Rahane, G., Kavatamane, V. K. & Balasubramanian, G. Dynamical sensitivity control of a single-spin quantum sensor. (2015). at <http://arxiv.org/abs/1512.09256>
[9] Rugar, D. et al. Proton magnetic resonance imaging using a nitrogen-vacancy spin sensor. Nat. Nanotechnol. (2014).
[10] Lazariev, A. & Balasubramanian, G. A nitrogen-vacancy spin based molecular structure microscope using multiplexed projection reconstruction. Sci. Rep. 5, 14130 (2015).