NV– diamond laser

Savvin, Alexander; Dormidonov, A. E.; Smetanina, Evgeniya; Mitrokhin, V. P.; Lipatov, E. I.; Genin, D. E.; Potanin, S.; Yelisseyev, A.; Vins, V. G.

doi:10.1038/s41467-021-27470-7

Cited by 40 publications

(23 citation statements)

References 52 publications

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“…NV-ensembles with high NV − concentrations and/or large detection volumes are favored for precision magnetometry [17][18][19][20], for a considerably improved signal-to-noise ratio and sensitivity, which both ideally improve with the square root of the number of sensing spins [21,22]. Therefore, bulk diamonds with NV-ensembles throughout the entire diamond volume are required for many applications such as detecting magnetic nanoparticles [23], battery characterization [24], vector imaging [25,26], and lasing [27,28]. High NV − concentrations require an enhanced nitrogen incorporation in diamonds, especially in the form of isolated-substitutional-nitrogen atoms (called P1 center or N 0 s center) [29,30], which are converted to NV centers via irradiation and annealing.…”

Section: Introductionmentioning

confidence: 99%

Creation of nitrogen-vacancy centers in chemical vapor deposition diamond for sensing applications

et al. 2022

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The nitrogen-vacancy (NV) center in diamond is a promising quantum system for magnetometry applications exhibiting optical readout of minute energy shifts in its spin sub-levels. Key material requirements for NV ensembles are a high NV- concentration, a long spin coherence time and a stable charge state. However, these are interdependent and can be difficult to optimize during diamond growth and subsequent NV creation. In this work, we systematically investigate the NV center formation and properties in bulk chemical vapor deposition (CVD) diamond. The nitrogen flow during growth is varied by over 4 orders of magnitude, resulting in a broad range of single substitutional nitrogen concentrations of 0.2-20~parts per million. For a fixed nitrogen concentration, we optimize electron-irradiation fluences with two different accelerated electron energies, and we study defect formation via optical characterizations. We discuss a general approach to determine the optimal irradiation conditions, for which an enhanced NV concentration and an optimum of NV charge states can both be satisfied. We achieve spin-spin coherence times T2 ranging from 45.5 to 549 μs for CVD diamonds containing 168 to 1~parts per billion NV- centers, respectively. This study shows a pathway to engineer properties of NV-doped CVD diamonds for improved sensitivity.

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Section: Introductionmentioning

confidence: 99%

Creation of nitrogen-vacancy centers in chemical vapor deposition diamond for sensing applications

et al. 2022

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“…In relation (1), β(λ) in this case is an indicator of the total optical loss at wavelength λ. From (3) the threshold population inversion density is determined, the excess of which will lead to amplification.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

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confidence: 99%

Superluminescence of NV centers in diamond pumped by the second harmonic of a Nd:YAG laser

Genin¹,

Mironov²,

Tel’minov³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

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In the light of the creation of a diamond laser [1], an urgent task is to determine the characteristics of diamonds in order to determine the range in which such lasers can be created not in isolated cases. This work is aimed at studying the mechanisms of creating superluminescence in diamond under the action of optical pumping by the second harmonic of an ND:YAG laser (λ = 532 nm). It was found that, upon pulsed excitation of a diamond by an ND:YAG laser with a pump intensity above ~2.0 MW/cm2 in the spectral range 700–750 nm, a nonlinear increase in intensity appears against the background of the spontaneous photoluminescence spectrum, which, with a further increase in the pump intensity, turns into a pronounced superluminescence peak with a maximum at about 718 nm. An increase in the pump intensity from 2.7 to 46 MW/cm2leads to the broadening of this peak at half maximum from 13 to 19 nm. At high levels of pump intensity, nonlinear absorption of pump radiation and accumulation of NV centers in the excited state were found. The position of the photoluminescence band was calculated as a function of various values of the inversion density of the populations of color centers, taking into account the intrinsic absorption spectrum of diamond. The calculation results are close to the experimental data.

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“…For this reason, a laser out of NV centers is the goal to enable crossing boundaries in NV center sensitivities. However, despite several studies (24,25,(27)(28)(29)(30)(31)(32)(33), very strong stimulated emission signals or magnetic field-dependent coherent readout have not been achieved so far.…”

Section: Introductionmentioning

confidence: 99%

Magnetic-field-dependent stimulated emission from nitrogen-vacancy centers in diamond

et al. 2022

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Negatively charged nitrogen-vacancy (NV) centers in diamond are promising magnetic field quantum sensors. Laser threshold magnetometry theory predicts improved NV center ensemble sensitivity via increased signal strength and magnetic field contrast. Here, we experimentally demonstrate laser threshold magnetometry. We use a macroscopic high-finesse laser cavity containing a highly NV-doped and low absorbing diamond gain medium that is pumped at 532 nm and resonantly seeded at 710 nm. This enables a 64% signal power amplification by stimulated emission. We test the magnetic field dependency of the amplification and thus demonstrate magnetic field–dependent stimulated emission from an NV center ensemble. This emission shows an ultrahigh contrast of 33% and a maximum output power in the milliwatt regime. The coherent readout of NV centers pave the way for novel cavity and laser applications of quantum defects and diamond NV magnetic field sensors with substantially improved sensitivity for the health, research, and mining sectors.

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NV– diamond laser

Cited by 40 publications

References 52 publications

Creation of nitrogen-vacancy centers in chemical vapor deposition diamond for sensing applications

Creation of nitrogen-vacancy centers in chemical vapor deposition diamond for sensing applications

Superluminescence of NV centers in diamond pumped by the second harmonic of a Nd:YAG laser

Magnetic-field-dependent stimulated emission from nitrogen-vacancy centers in diamond

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