Publications

2020
Farfurnik, D. & Bar-Gill, N. Characterizing spin-bath parameters using conventional and time-asymmetric Hahn-echo sequences. Physical Review B 101, 10, 104306 (2020). Publisher's Version
Bauch, E., et al. Decoherence of ensembles of nitrogen-vacancy centers in diamond. Physical Review B 102, 13, 134210 (2020). Publisher's Version
Genov, G.T., Ben-Shalom, Y., Jelezko, F., Retzker, A. & Bar-Gill, N. Efficient and robust signal sensing by sequences of adiabatic chirped pulses. Physical Review Research 2, 3, 033216 (2020). Publisher's Version
Ben 'Attar, K.I.O., Farfurnik, D. & Bar-Gill, N. Hamiltonian engineering of general two-body spin-1/2 interactions. Physical Review Research 2, 1, 013061 (2020). Publisher's Version
Rao, B.D.D., Ghosh, A., Gelbwaser-Klimovsky, D., Bar-Gill, N. & Kurizki, G. Spin-bath polarization via disentanglement. New Journal of Physics 22, 8, 083035 (2020). Publisher's Version
2019
Meirzada, I., Wolf, S.A., Naiman, A., Levy, U. & Bar-Gill, N. Enhanced spin state readout of nitrogen-vacancy centers in diamond using infrared fluorescence. Physical Review B 100, 12, 125436 (2019). Publisher's Version
Romach, Y., et al. Measuring Environmental Quantum Noise Exhibiting a Nonmonotonic Spectral Shape. Physical Review Applied 11, 1, 014064 (2019). Publisher's Version
Pick, A., Silberstein, S., Moiseyev, N. & Bar-Gill, N. Robust mode conversion in NV centers using exceptional points. Physical Review Research 1, 1, 013015 (2019). Publisher's Version
2018
Alfasi, N., et al. Exploring the nonlinear regime of light-matter interaction using electronic spins in diamond. Physical Review A 97, 6, 063808 (2018). Publisher's Version
Meirzada, I., Hovav, Y., Wolf, S.A. & Bar-Gill, N. Negative charge enhancement of near-surface nitrogen vacancy centers by multicolor excitation. Physical Review B 98, 24, 245411 (2018). Publisher's Version
Farfurnik, D., Horowicz, Y. & Bar-Gill, N. Identifying and decoupling many-body interactions in spin ensembles in diamond. Phys. Rev. A 98, 033409 (2018). Publisher's Version
Hovav, Y., Naydenov, B., Jelezko, F. & Bar-Gill, N. Low-Field Nuclear Polarization Using Nitrogen Vacancy Centers in Diamonds. Physical Review Letters 120, 6, 060405 (2018). Publisher's Version
Farfurnik, D., Jarmola, A., Budker, D. & Bar-Gill, N. Spin ensemble-based AC magnetometry using concatenated dynamical decoupling at low temperatures. Journal of Optics 20, 2, 024008 (2018). Publisher's Version
2017
Farchi, E., et al. Quantitative Vectorial Magnetic Imaging of Multi-Domain Rock Forming Minerals Using Nitrogen-Vacancy Centers in Diamond. Spin 7, 3, 1740015 (2017). Publisher's VersionAbstract

 

Magnetization in rock samples is crucial for paleomagnetometry research, as it harbors valuable geological information on long term processes, such as tectonic movements and the formation of oceans and continents. Nevertheless, current techniques are limited in their ability to measure high spatial resolution and high-sensitivity quantitative vectorial magnetic signatures from individual minerals and micrometer scale samples. As a result, our understanding of bulk rock magnetization is limited, specifically for the case of multi-domain minerals. In this work, we use a newly developed nitrogen-vacancy magnetic microscope, capable of quantitative vectorial magnetic imaging with optical resolution. We demonstrate direct imaging of the vectorial magnetic field of a single, multi-domain dendritic magnetite, as well as the measurement and calculation of the weak magnetic moments of an individual grain on the micron scale. These results pave the way for future applications in paleomagnetometry and for the fundamental understanding of magnetization in multi-domain samples.

 

bar-gill_-_quantitative_vectorial_magnetic_imaging_of_multi-domain_rock_forming_minerals_using_nitrogen-vacancy_centers_in_diamond.pdf
Farfurnik, D., et al. Enhanced concentrations of nitrogen-vacancy centers in diamond through TEM irradiation. Appl. Phys. Lett. 111, 123101 (2017). Publisher's Version
Farfurnik, D., et al. Experimental realization of time-dependent phase-modulated continuous dynamical decoupling. Phys. Rev. A 96, 013850 (2017). Publisher's Version
Bar-Gill, N. & Retzker, A. Observing chemical shifts from nanosamples. Science (Perspective) 357, 6346, 38 (2017). Publisher's Version
2015
Wolf, S.A., Rosenberg, I., Rapaport, R. & Bar-Gill, N. Purcell-enhanced optical spin readout of nitrogen-vacancy centers in diamond. Phys. Rev. B 92, 235410 (2015). Publisher's Version
Farfurnik, D., et al. Optimizing a dynamical decoupling protocol for solid-state electronic spin ensembles in diamond. Phys. Rev. B 92, 060301 (2015). Publisher's Version
Arai, K., et al. Optical magnetic resonance imaging with nanoscale resolution and compressed sensing speed-up. Nat. Nanotechnol. Advanced online publication, (2015). Publisher's VersionAbstract

Optically detected magnetic resonance using nitrogen-vacancy (NV) colour centres in diamond is a leading modality for nanoscale magnetic field imaging, as it provides single electron spin sensitivity, three-dimensional resolution better than 1 nm (ref. 5) and applicability to a wide range of physical and biological samples under ambient conditions. To date, however, NV-diamond magnetic imaging has been performed using 'real-space' techniques, which are either limited by optical diffraction to ∼250 nm resolution or require slow, point-by-point scanning for nanoscale resolution, for example, using an atomic force microscope, magnetic tip, or super-resolution optical imaging. Here, we introduce an alternative technique of Fourier magnetic imaging using NV-diamond. In analogy with conventional magnetic resonance imaging (MRI), we employ pulsed magnetic field gradients to phase-encode spatial information on NV electronic spins in wavenumber or 'k-space' followed by a fast Fourier transform to yield real-space images with nanoscale resolution, wide field of view and compressed sensing speed-up.

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