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7 results for “NV center”
Scripts for quantifying the effect of diamond nano-pillars on the fluorescence of NV centers
<p><strong>Summary</strong></p> <p>Scripts and data can be used to reproduce and build on the numerical results published under the title: "<a href="http://doi.org/10.3390/nano12091516">Optical and Spin Properties of NV Center Ensembles in Diamond Nano-Pillars</a>" by Kseniia Volkova, Julia Heupel, Sergei Trofimov, Fridtjof Betz, Rémi Colom, Rowan W. MacQueen, Sapida Akhundzada, Meike Reginka, Arno Ehresmann, Johann P. Reithmaier, Sven Burger, Cyril Popov, and Boris Naydenov (Nanomaterials 12(9), 1516, 2022).</p> <p><strong>Method</strong></p> <p>The dipole emitters are assumed to be distributed uniformly 30 nm below the top surface of the nano-pillars. They are first integrated with a trapezoidal rule along the azimuth (because of the periodicity this results in a geometrical convergence) and with a 15 point Gauss-Kronrod quadrature rule in radial direction.</p> <p>The main source of error results from the dipole positions being integrated only from 0 to R - min_dist, as it is challenging to model a dipole emitter located only few nanometers from the curved material interface. Further numerical parameters can be adjusted in the input files for JCMsuite. Both, a 3D setup and a 2D setup are provided. The letter exploits the rotational symmetry which results in a smaller memory footprint. Yet, as the distance of the dipole from the symmetry axis increases, many Fourier components are required which leads to long computation times.</p> <p>For further quantitative studies we propose the 3D setup that is the default in the script 'integration.m', which allows to integrate closer to the side walls without increasing the costs. Furthermore in the second data set, shipped together with the data published in the paper, the height has been kept constant. In the paper the height has been chosen according to the fabricated samples. The 90° angle has been assigned to the [111] samples and the correspondingt height of 1400 nm and the 35.3° angle was assigned to the [100] samples and a height of 2200 nm.</p> <p><strong>Structure</strong></p> <p>The directories <strong>scattering2D</strong>, <strong>scattering3D </strong>and <strong>scatteringFlat</strong> contain input files for JCMsuite. The script 'integration.m' can be used to produce new data. With 'plotresults.m' you can either plot the results produced with 'integration.m' or those which were published in the related paper. Please note that the provided example produced with the script 'integration.m' differs from the published data, which has been computed with slightly different parameters.</p> <p><strong>Requirements</strong></p> <ul> <li>JCMsuite 5.2.0</li> <li>Matlab R2019b</li> </ul> <p>In order to produce new data, you must replace the corresponding place holders in the files by a path to your installation of JCMsuite. Free trial licenses are available, please refer to the homepage of <a href="https://jcmwave.com/">JCMwave</a>.</p>
Replication Data for: Determination of Intrinsic Effective Fields and Microwave Polarizations by High-Resolution Spectroscopy of Single NV Center Spins
<p>Data repository for: <strong>Determination of Intrinsic Effective Fields and Microwave Polarizations by High-Resolution Spectroscopy of Single NV Center Spins</strong></p> <p><em>Data description.pdf</em> describes the uploaded data.<br> <em>Data.xlsx</em> is the data represented in the paper.<br> <em>Esrfit_Npeak.m</em>, <em>Esrfit_xN.m</em>, <em>GaussianFunc.m</em>, <em>Gaussian_xN_Func.m</em>, <em>Lorentz_Func.m</em>, <em>Lorentz_xN_Func.m</em>, <em>Rabifit_xN.m</em>, <em>Rabi_xN_Func.m</em>, <em>FourierTransformRabi.m</em> are Matlab code files to transform and fit the data.</p>
Data of the publication Hot ion implantation to create dense NV center ensembles in diamond
<p>Data of the publication published under the reference: M.W.<em> </em>Ngambeu Ngambou, Appl. Phys. Lett. 124, 134002 (2024).</p>
Data for "Impact of Charge Conversion on NV-Center Relaxometry"
<p>Here, data sets as plotted in the preprint "Impact of Charge Conversion on NV-Center Relaxometry" (v2) are uploaded.</p> <p>The zip file "Data_v2" contains a folder for each figure in the preprint (named after the figure).</p> <p>Each folder contains the data for all graphs in each figure (e.g. (a) and (b) of figure 3) in separate csv files and, if necessary, a text document file "README", in which additional information can be found. If a fit function is plotted in a graph, the folder contains another separate csv file in which the fit data and fit function are contained.</p>
Data for "Temperature dependence of charge conversion during NV-center relaxometry in nanodiamond"
<p>In this Zenodo repository, the data as plotted in "Temperature dependence of charge conversion during NV-center relaxometry in nanodiamond" is uploaded. The file consists of folders named after the figures in the manuscript, where each folder contains csv files and a readme file in which additional information can be found. If a fit function is plotted in a figure, the fit data is also given in a csv file.</p>
Long-Lived Ensembles of Shallow NV− Centers in Flat and Nanostructured Diamonds by Photoconversion
<p>Shallow, negatively charged nitrogen-vacancy centers (NV−) in diamond have been proposed for high-sensitivity magnetometry and spin-polarization transfer applications. However, surface effects tend to favor and stabilize the less useful neutral form, the NV0 centers. Here, we report the effects of green laser irradiation on ensembles of nanometer-shallow NV centers in flat and nanostructured diamond surfaces as a function of laser power in a range not previously explored (up to 150 mW/μm2). Fluorescence spectroscopy, optically detected magnetic resonance (ODMR), and charge-photoconversion detection are applied to characterize the properties and dynamics of NV− and NV0 centers. We demonstrate that high laser power strongly promotes photoconversion of NV0 to NV− centers. Surprisingly, the excess NV− population is stable over a timescale of 100 ms after switching off the laser, resulting in long-lived enrichment of shallow NV−. The beneficial effect of photoconversion is less marked in nanostructured samples. Our results are important to inform the design of samples and experimental procedures for applications relying on ensembles of shallow NV− centers in diamond.</p>
Replication Data for: Magnetic measurements on micron-size samples under high pressure using designed NV centers
<pre><em>Data description.pdf </em>describes the uploaded data. <em>Figure Data.xlsx</em> contains the data represented in the figures of the main text and supplementary information. <em>Iron.zip and MgB2.zip </em>include the raw experimental data. <em>PlotIronData.m, PlotMgB2Data.m, SimulatedIronMagneticField.m</em>, <em>SphereField.m</em>, <em>CarttoPol.m</em>, <em>PoltoCart.m </em>are Matlab codes used to process and fit the data. </pre>
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