High-sensitivity Q-band electron spin resonance imaging system with submicron resolution

Shtirberg, Lazar; Twig, Ygal; Dikarov, Ekaterina; Halevy, Revital; Levit, Michael; Blank, Aharon

doi:10.1063/1.3581226

Cited by 38 publications

(38 citation statements)

References 24 publications

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“…This is clearly feasible for NV centers in diamonds; their fluorescence signal, when collected with modest efficiency, can reach many thousands of photons per second, 16 and they obviously can provide more than enough signal when using commercially-available sensitive optical detectors. In addition much stronger pulsed field gradients can be obtained (as we demonstrate i with our Q-band micro-imaging setup 9 ). Under such conditions, the limiting factor for the image resolution is just the stability of the detected fluorescence signal.…”

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“…1a. It combines our "home-made" pulsed ESR imaging system (detailed in ref 9 ) with an optical setup for exciting the NV centers in the diamond and detecting their fluorescence signals.We made use of a microimaging probe head operating at room temperature, based on a dielectric ring resonator (fabricated from a single crystal of TiO 2 ) with resonance frequency of 10.6 GHz. 9-11 A type-Ib synthetic diamond, with a [111] face (Element 6), with estimated NV concentration of ~10 17 spins /cm 3 was placed inside the resonator with its surface aligned along the main static field.…”

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“…1a. It combines our "home-made" pulsed ESR imaging system (detailed in ref 9 ) with an optical setup for exciting the NV centers in the diamond and detecting their fluorescence signals.…”

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Optically detected magnetic resonance imaging

Blank

Shapiro

Fischer

et al. 2015

Applied Physics Letters

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Optically detected magnetic resonance (ODMR) provides ultrasensitive means to detect and image a small number of electron and nuclear spins, down to the single spin level with nanoscale resolution. Despite the significant recent progress in this field, it has never been combined with the power of pulsed magnetic resonance imaging (MRI) techniques.Here, we demonstrate for the first time how these two methodologies can be integrated using short pulsed magnetic field gradients to spatially-encode the sample. This results in what we denote as an "optically detected magnetic resonance imaging" (ODMRI) technique. It offers the advantage that the image is acquired in parallel from all parts of the sample, with well-defined three-dimensional point-spread function, and without any loss of spectroscopic information. In addition, this approach may be used in the future for parallel but yet spatially-selective efficient addressing and manipulation of the spins in the sample. Such capabilities are of fundamental importance in the field of quantum spin-based devices and sensors. 3The selective control and measurement of a small number of electron spins with high spatial resolution is an experimental capability of fundamental importance that is at the basis of many spin-based quantum information devices and sensor technologies. For example, many suggestions and approaches to spin-based quantum computations (QCs -those making use of various quantum phenomena to solve some challenging computation tasks) require such capabilities as a prerequisite for fabricating an actual useful device. 1,2 Furthermore, the manipulation and measurement of electron spins are not only central to many quantum-proposed devices, but can also be used to fabricate spin-based sensors, for example, for high-resolution mapping of magnetic and electric fields with extreme accuracy. 3,4 One possible approach that can potentially answer these requirements makes use of optically detected magnetic resonance (ODMR).ODMR is a very sensitive technique that can detect a small number of paramagnetic species -even single spins -in specific systems whose optical transitions are coupled to their magnetic levels. 1 In recent years this technique has picked up a significant momentum, due mainly to the many applications and interesting physics revealed through the ODMR of nitrogen vacancy (NV) centers in diamonds. 2 ODMR can be relatively easily employed in the imaging of heterogeneous samples by making use of well-established conventional optical imaging modalities, such as confocal fluorescence microscopy. However, these approaches still have resolution limitations regarding applications aiming at the nanoscale regime. 4Furthermore, optical microscopy cannot provide a solution in cases where selective excitation of some of the paramagnetic centers is required, or where some other "dark" spins (i.e., spins that do not produce luminescence signals) in the vicinity of the optical-active center need to be imaged. 5 The existing approaches to high resolution (nanosc...

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Optically detected magnetic resonance imaging

Blank

Shapiro

Fischer

et al. 2015

Applied Physics Letters

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“…3. Briefly, the system includes a wideband microwave spectrometer that covers the 6-18 and 32-37 GHz range (Qband), a microimaging probe head, gradient current drivers for spatial encoding of the spins, and control software.…”

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Induction-detection electron spin resonance with spin sensitivity of a few tens of spins

Artzi

Twig

Blank

2015

Applied Physics Letters

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Articles you may be interested inInfluence of the electron spin resonance saturation on the power sensitivity of cryogenic sapphire resonators Note: High sensitivity pulsed electron spin resonance spectroscopy with induction detection Rev. Sci. Instrum. 82, 076105 (2011); 10.1063/1.3611003Advantages of superconducting quantum interference device-detected magnetic resonance over conventional high-frequency electron paramagnetic resonance for characterization of nanomagnetic materials

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“…Recently, we have made some efforts to alleviate this handicap of ESR by means of a unique methodology we developed for high-sensitivity high-resolution pulsed ESR microimaging [32]. This approach was implemented in a study of oxygen concentration distribution near cyanobacteria cells, using a soluble trityl free radical spin probe that was incorporated into the solution media surrounding the cells [33].…”

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confidence: 99%