scholarly journals Optical Magnetometry Based on Nanodiamonds with Nitrogen-Vacancy Color Centers

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2951 ◽  
Author(s):  
Adam M. Wojciechowski ◽  
Paulina Nakonieczna Mariusz Mrózek ◽  
Krystian Sycz ◽  
Andrzej Kruk ◽  
Mateusz Ficek ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Remote Sensing ◽  
Numerical Aperture ◽  
Nitrogen Vacancy ◽  
Color Centers ◽  
Glass Substrates ◽  
Sensing Applications ◽  
Optical Magnetometry ◽  
Optically Detected ◽  
The Magnetic Field

Nitrogen-vacancy color centers in diamond are a very promising medium for many sensing applications such as magnetometry and thermometry. In this work, we study nanodiamonds deposited from a suspension onto glass substrates. Fluorescence and optically detected magnetic resonance spectra recorded with the dried-out nanodiamond ensembles are presented and a suitable scheme for tracking the magnetic-field value using a continuous poly-crystalline spectrum is introduced. Lastly, we demonstrate a remote-sensing capability of the high-numerical-aperture imaging fiber bundle with nanodiamonds deposited on its end facet.

scholarly journals Nuclear spin assisted magnetic field angle sensing

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Ziwei Qiu ◽  
Uri Vool ◽  
Assaf Hamo ◽  
Amir Yacoby
Keyword(s):  
Magnetic Field ◽  
Nuclear Spin ◽  
Coherence Time ◽  
Nitrogen Vacancy ◽  
Sensing Applications ◽  
Field Sensitivity ◽  
Underlying Principle ◽  
Quantum Sensing ◽  
External Signals ◽  
The Magnetic Field

AbstractQuantum sensing exploits the strong sensitivity of quantum systems to measure small external signals. The nitrogen-vacancy (NV) center in diamond is one of the most promising platforms for real-world quantum sensing applications, predominantly used as a magnetometer. However, its magnetic field sensitivity vanishes when a bias magnetic field acts perpendicular to the NV axis. Here, we introduce a different sensing strategy assisted by the nitrogen nuclear spin that uses the entanglement between the electron and nuclear spins to restore the magnetic field sensitivity. This, in turn, allows us to detect small changes in the magnetic field angle relative to the NV axis. Furthermore, based on the same underlying principle, we show that the NV coupling strength to magnetic noise, and hence its coherence time, exhibits a strong asymmetric angle dependence. This allows us to uncover the directional properties of the local magnetic environment and to realize maximal decoupling from anisotropic noise.

scholarly journals Rheological and Resistance Properties of Magnetorheological Elastomer with Cobalt for Sensor Application

2020 ◽  
Vol 10 (5) ◽  
pp. 1638 ◽  
Author(s):  
Afiq Azri Zainudin ◽  
Nurul Azhani Yunus ◽  
Saiful Amri Mazlan ◽  
Muhammad Kashfi Shabdin ◽  
Siti Aishah Abdul Aziz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Vibrating Sample Magnetometer ◽  
Magnetorheological Elastomer ◽  
X Ray ◽  
Sensing Applications ◽  
Morphological Aspects ◽  
Frequency Sweep Test ◽  
Applied Forces ◽  
The Magnetic Field

Cobalt particles have been introduced as a filler due to the advantages of embedding their magnetic and electrical properties in magnetorheological elastomer (MRE). In the present research, the rheology and resistance of MRE are experimentally evaluated. Isotropic and anisotropic MRE samples containing silicone rubber and cobalt particles were fabricated. The magnetic properties of MRE are conducted using a vibrating sample magnetometer (VSM). The morphological aspects of MRE are observed by using field emission scanning electron microscopy (FESEM) and characterized by energy-dispersive X-ray spectroscopy (EDX). Rheological properties under various magnetic field strengths were measured for the magnetic field, strain amplitude, and frequency sweep test by using a parallel-plate rheometer. Subsequently, the resistance of MRE is tested under different applied forces and magnetic fields. The MRE storage modulus depicted an enhancement in field-dependent modulus across all the applied magnetic fields. The electrical resistance generated from the sample can be manipulated by external magnetic fields and mechanical loads. The conductivity of MRE is due to the existence of cobalt arrangements observed by FESEM. By introducing cobalt as filler and obtaining satisfactory results, the study might open new avenues for cobalt to be used as filler in MRE fabrication for future sensing applications.

scholarly journals Influence of a static magnetic field on the photoluminescence of an ensemble of nitrogen-vacancy color centers in a diamond single-crystal

2009 ◽  
Vol 95 (13) ◽  
pp. 133101 ◽  
Author(s):  
Ngoc Diep Lai ◽  
Dingwei Zheng ◽  
Fedor Jelezko ◽  
François Treussart ◽  
Jean-François Roch
Keyword(s):  
Magnetic Field ◽  
Single Crystal ◽  
Static Magnetic Field ◽  
Nitrogen Vacancy ◽  
Color Centers ◽  
Diamond Single Crystal

Odesr Studies of a-Si:H with Subgap Excitation

1993 ◽  
Vol 297 ◽  
Author(s):  
D. Mao ◽  
S.Q. Gu ◽  
P.C. Taylor
Keyword(s):  
Magnetic Field ◽  
Excitation Energy ◽  
Signal Intensity ◽  
Sensitive Detection ◽  
Relative Signal Intensity ◽  
Recombination Processes ◽  
Phase Sensitive ◽  
Phase Sensitive Detection ◽  
Optically Detected ◽  
The Magnetic Field

We report studies of the spin-dependent recombination processes in device-quality a-Si:H by optically detected ESR (ODESR) with the excitation energy (Ex) varied from above-gap to sub-gap. The photoluminescence (PL) transients induced by the chopping of the microwaves are recorded as functions of the magnetic field to yield the lineshapes. This scheme, to some extent, circumvents the problem of interferences between "enhancing" and "quenching" signals encountered in conventional phase-sensitive detection. The PL below 1.1 eV is monitored. For Ex above 1.5 eV, we find all the lineshapes are similar: a broad, slightly asymmetric enhancing line peaking at g = 2.008 and an asymmetric quenching line peaking at g = 2.005. Lineshape changes are noticeable for Ex below 1.5 eV. The relative signal intensity AI/I changes dramatically with varying excitation energy. Light-soaking of the sample induces an additional enhancing signal which peaks at g = 2.006.

SPIN–LATTICE INTERACTION EXPERIMENTS ON COLOR CENTERS IN QUARTZ

1964 ◽  
Vol 42 (4) ◽  
pp. 595-607 ◽  
Author(s):  
A. L. Taylor ◽  
G. W. Farnell
Keyword(s):  
Magnetic Field ◽  
Dielectric Loss ◽  
Low Frequency ◽  
The Other ◽  
Color Centers ◽  
Resonance Signal ◽  
Spin Lattice ◽  
Resonance Frequencies ◽  
Spin Resonance ◽  
The Magnetic Field

The paramagnetism of the color centers in smoky quartz is caused by the electron which is missing from a nonbonding oxygen orbital near an aluminum impurity. The effects produced by externally introduced microwave phonons on the spin-resonance signal from these color centers have been studied in detail as a function of the relative phonon and spin-resonance frequencies, the phonon power, the spectrometer power, the magnetic field angle, and the phonon polarization. As has been noted previously, these interactions do not conform with those observed in other paramagnetic crystals. Effects of an applied electric field on the resonance lines and various further experiments on the color centers in smoky quartz are reported; two in particular suggest that the "hole", the missing electron, makes thermally excited transitions between two different sites adjacent to a given impurity atom. One of the experiments is a measurement of the cross relaxation which takes place between the various lines of the spectrum, while the other is a measurement of the low-frequency dielectric loss found at liquid helium temperatures. An attempt is made to discuss the spin-phonon results in terms of such transitions for the holes.

scholarly journals Preparation and characterization of AFM tips with nitrogen-vacancy and nitrogen-vacancy-nitrogen color centers

2021 ◽  
Vol 13 (2) ◽  
pp. 28
Author(s):  
Zuzanna Orzechowska ◽  
Mariusz Mrózek ◽  
Wojciech Gawlik ◽  
Adam Wojciechowski
Keyword(s):  
Magnetic Field ◽  
Atomic Force Microscopy ◽  
Magnetic Resonance ◽  
Nitrogen Vacancy ◽  
Color Centers ◽  
Force Microscopy ◽  
Single Spin ◽  
Atomic Force ◽  
Afm Tips ◽  
Nanoscale Imaging

We demonstrate a simple dip-coating method of covering standard AFM tips with nanodiamonds containing color centers. Such coating enables convenient visualization of AFM tips above transparent samples as well as using the tip for performing spatially resolved magnetometry. Full Text: PDF ReferencesG. Binnig, C. F. Quate, C. Gerber, "Atomic Force Microscope", Phys. Rev. Lett. 56, 930 (1986). CrossRef F .J. Giessibl, "Advances in atomic force microscopy", Rev. Mod. Phys. 75, 949 (2003). CrossRef S. Kasas, G. Dietler, "Probing nanomechanical properties from biomolecules to living cells", Eur. J. Appl. Physiol. 456, 13 (2008). CrossRef C. Roduit et al., "Stiffness Tomography by Atomic Force Microscopy", Biophys. J. 97, 674 (2009). CrossRef L. A. Kolodny et al., "Spatially Correlated Fluorescence/AFM of Individual Nanosized Particles and Biomolecules", Anal. Chem. 73, 1959 (2001). CrossRef L. Rondin et al., "Magnetometry with nitrogen-vacancy defects in diamond", Rep. Prog. Phys. 77, 056503 (2014). CrossRef C. L. Degen, "Scanning magnetic field microscope with a diamond single-spin sensor", Appl. Phys. Lett. 92, 243111 (2008). CrossRef J. M. Taylor et al., "High-sensitivity diamond magnetometer with nanoscale resolution", Nat. Phys. 4, 810 (2008). CrossRef J. R. Maze et al., "Nanoscale magnetic sensing with an individual electronic spin in diamond", Nature 455, 644 (2008). CrossRef L. Rondin et al., "Nanoscale magnetic field mapping with a single spin scanning probe magnetometer", Appl. Phys. Lett. 100, 153118 (2012). CrossRef J. P. Tetienne et al., "Nanoscale imaging and control of domain-wall hopping with a nitrogen-vacancy center microscope", Science 344, 1366 (2014). CrossRef R. Nelz et al., "Color center fluorescence and spin manipulation in single crystal, pyramidal diamond tips", Appl. Phys. Lett. 109, 193105 (2016). CrossRef G. Balasubramanian et al., "Nanoscale imaging magnetometry with diamond spins under ambient conditions", Nature 455, 648 (2008). CrossRef P. Maletinsky et al., "A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres", Nat. nanotechnol. 7, 320 (2012). CrossRef L. Thiel et al., "Quantitative nanoscale vortex imaging using a cryogenic quantum magnetometer", Nat. nanotechnol. 11, 677 (2016). CrossRef F. Jelezko et al., "Single spin states in a defect center resolved by optical spectroscopy", Appl. Phys. Lett. 81, 2160 (2002). CrossRef M. W. Doherty et al., "The nitrogen-vacancy colour centre in diamond", Phys. Rep. 528, 1 (2013). CrossRef C. Kurtsiefer, S. Mayer, P. Zarda, H. Weinfurter, "Stable Solid-State Source of Single Photons", Phys. Rev. Lett. 85, 290 (2000). CrossRef A. Gruber, A. Dräbenstedt, C. Tietz, L. Fleury, J. Wrachtrup, C. Von Borczyskowski, "Scanning Confocal Optical Microscopy and Magnetic Resonance on Single Defect Centers", Science 276, 2012 (1997). CrossRef F. Dolde et al., "Electric-field sensing using single diamond spins", Nat. Phys. 7, 459 (2011). CrossRef K. Sasaki et al., "Broadband, large-area microwave antenna for optically detected magnetic resonance of nitrogen-vacancy centers in diamond", Rev. Sci. Instrum. 87, 053904 (2016). CrossRef A. M. Wojciechowski et al., "Optical Magnetometry Based on Nanodiamonds with Nitrogen-Vacancy Color Centers", Materials 12, 2951 (2019). CrossRef I. V. Fedotov et al., "Fiber-optic magnetometry with randomly oriented spins", Opt. Lett. 39, 6755 (2014). CrossRef

scholarly journals Magnetic-Field-Enhanced Morphology of Tin Oxide Nanomaterials for Gas Sensing Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Jonathan C. Briones ◽  
Gwen Castillon ◽  
Michael P. Delmo ◽  
Gil Nonato C. Santos
Keyword(s):  
Magnetic Field ◽  
Tin Oxide ◽  
Magnetic Field Intensity ◽  
Gas Sensing ◽  
Phase Growth ◽  
X Ray ◽  
Sensing Applications ◽  
Headspace Gas ◽  
The Magnetic Field ◽  
Key Parameter

We studied the effect of an external magnetic field (up to 0.31 T) on the growth of SnO2nanowires fabricated using the horizontal vapor phase growth (HPVG) technique. The morphology of the nanowires was characterized by using scanning electron microscopy (SEM), and the chemical composition was characterized by energy dispersive X-ray (EDX) analysis. We found that the length of nanowires was significantly enhanced by the application of EMF. The aspect ratio, as well as the density of the fabricated nanowires, increased with increasing magnetic field intensity. Although the physics behind the morphology enhancement of the nanowires under magnetic field is still being investigated, nevertheless, we demonstrated that the magnetic field could be used as a key parameter to control the morphology of tin oxide nanomaterials grown via HPVG technique. The magnetically enhanced nanowires were used in the development of a gas sensor and were found to be sensitive to hydrogen sulfide gas and the headspace gas emitted by spoiling meat.

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