Magnetic imaging of malarial nanocrystals with diamond sensors

Fescenko, Ilja; Laraoui, Abdelghani; Šmits, Jānis; Mosavian, Nazanin; Kehayias, Pauli; Seto, Jong; Bougas, Lykourgos; Jarmola, Andrey; Acosta, Víctor M.

doi:10.1364/fio.2019.jw3a.89

Cited by 5 publications

(8 citation statements)

References 6 publications

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“…1) is caused by simultaneous effects of the stresses in a hosting NV centers diamond crystals, the bias magnetic field, stray magnetic fields, and temperature shift. The magnetic field effects could be separated by measuring both frequencies f + and f − which are shifted by approximately equal amounts in opposite directions [34,35]. The shift of f + and f − by equal amounts in the same direction (common shift) is then caused by changes in local temperature and stresses.…”

Section: A Detection Principlementioning

confidence: 99%

NV microscopy of thermally controlled stresses caused by Cr$_2$O$_3$ thin films

Bērziņš¹,

Šmits²,

Petruhins³

et al. 2021

Preprint

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Many modern applications, including quantum computing and quantum sensing, use substratefilm interfaces. Particularly, thin films of chromium or titanium and their oxides are commonly used to bind various structures, such as resonators, masks, or microwave antennas, to a diamond surface. Due to different thermal expansions of involved materials, such films and structures could produce significant stresses, which need to be measured or predicted. In this paper, we demonstrate imaging of stresses in the top layer of diamond with deposited structures of Cr2O3 at temperatures 19 • C and 37 • C by using stress-sensitive optically detected magnetic resonances (ODMR) in NV centers. We also calculated stresses in the diamond-film interface by using finite-element analysis and correlated them to measured ODMR frequency shifts. As predicted by the simulation, the measured high-contrast frequency-shift patterns are only due to thermal stresses, whose spin-stress coupling constant along the NV axis is 21±1 MHz/GPa that is in agreement with constants previously obtained from single NV centers in diamond cantilever. Our widefield imaging demonstrates the NV microscopy as a convenient platform that could optically detect and quantify spatial distributions of stresses in diamond-based photonic devices with a micrometer precision. Our results also show that thin film structures produce significant stresses in them, that should be accounted for in NV-based applications.

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Section: A Detection Principlementioning

confidence: 99%

NV microscopy of thermally controlled stresses caused by Cr$_2$O$_3$ thin films

Bērziņš¹,

Šmits²,

Petruhins³

et al. 2021

Preprint

Self Cite

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“…Solid-state spin systems have transitioned from physics demonstrations to promising quantum sensors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] as performance has improved through materials engineering [17][18][19][20][21][22][23][24][25], coherent control [26][27][28][29][30][31][32][33][34][35], and novel readout [36][37][38][39][40][41][42][43]. While performance now rivals atomic-based sensors [44][45][46][47][48][49], solid-state systems still maintain much of the complexity of their atomic counterparts …”

Section: Introductionmentioning

confidence: 99%

Thermally-Polarized Solid-State Spin Sensor

Wilcox¹,

Eisenach²,

Barry³

et al. 2021

Preprint

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“…Spin-state manipulation with a stateselective microwave (MW) pulse, combined with spindependent fluorescence has been utilized for spectroscopic measurement of magnetic field. Fabrication of a dense ensemble of NV centers [3][4][5][6] allows these measurements to be applied in wide-field imaging modality [7][8][9][10], and local current characterizations using NV center have been achieved [11][12][13][14][15][16]. Wide-field imaging using NV center paves the way for inductive inspection [17,18], which is still challenging with micron-scale resolution by established methods.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous wide-field imaging of phase and magnitude of AC magnetic signal using diamond quantum magnetometry

Mizuno

Ishiwata

Masuyama

et al. 2020

Sci Rep

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Spectroscopic analysis of AC magnetic signal using diamond quantum magnetometry is a promising technique for inductive imaging. Conventional dynamic decoupling like XY8 provides a high sensitivity of an oscillating magnetic signal with intricate dependence on magnitude and phase, complicating high throughput detection of each parameter. In this study, a simple measurement scheme for independent and simultaneous detection of magnitude and phase is demonstrated by a sequential measurement protocol. Wide-field imaging experiment was performed for an oscillating magnetic field with approximately 100 µm-squared observation area. Single pixel phase precision was 2.1 • for 0.76 µT AC magnetic signal. Our method enables potential applications including inductive inspection and impedance imaging. A negatively charged nitrogen-vacancy (NV) center in diamond offers a promising material platform for quantum sensing 1,2. Spin-state manipulation with a state-selective microwave (MW) pulse, combined with spin-dependent fluorescence has been utilized for spectroscopic measurement of magnetic field. Fabrication of a dense ensemble of NV centers 3-6 allows these measurements to be applied in wide-field imaging modality 7-10 , and local current characterizations using NV center have been achieved 11-16. Wide-field imaging using NV center paves the way for inductive inspection 17,18 , which is still challenging with micron-scale resolution by established methods. Previous studies indicate that dynamical decoupling (DD) protocols like XY8 achieve magnetic field spectroscopy with high sensitivity for magnitude and phase of such a signa 19-22. Measuring magnitude and phase of oscillating magnetic signal is at the heart of Eddy-current inspection based upon inductive and impedance sensing, enabling conductivity measurement 23,24. Despite its high sensitivity, DD can only measure the output of fluorescence intensity with an intricate dependence on a magnitude and a phase of a signal. Therefore, a magnitude with a known phase or a phase with a known magnitude can only be measured with DD protocol 25. Independent and simultaneous measurements of magnitude and phase for magnetic field spectroscopy in wide-field open up new diamond applications such an accurate inductive sensing. In this study, we propose a stroboscopic measurement termed iQdyne 26 , a wide-field modality of Qdyne 27,28 enabled with lock-in detection, as a simple sensing scheme for magnitude b z and phase φ 0 of an oscillating magnetic field. The iQdyne provides an orthogonal measurement for magnitude and phase; it involves two input parameters (b z , φ 0) and time-series outputs I(b z)e iθ (φ 0) cos(2πft). Fourier analysis easily extracts two resulting parameters, magnitude I(b z) and phase θ(φ 0) , which are separated from each other and are readily interpretable. We implemented this stroboscopic protocol on a wide-field microscope and demonstrated an imaging experiment of an oscillating magnetic field generated from a current pattern fabricated on a diamond substrate. An ...

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Magnetic imaging of malarial nanocrystals with diamond sensors

Cited by 5 publications

References 6 publications

NV microscopy of thermally controlled stresses caused by Cr$_2$O$_3$ thin films

NV microscopy of thermally controlled stresses caused by Cr$_2$O$_3$ thin films

Thermally-Polarized Solid-State Spin Sensor

Simultaneous wide-field imaging of phase and magnitude of AC magnetic signal using diamond quantum magnetometry

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