Near-Colorless HPHT Synthetic Diamonds from AOTC Group

D’Haenens-Johansson, Ulrika F. S.; Moe, Kyaw Soe; Johnson, Paul; Wong, Shun Yan; Lu, Ren; Wang, Wuyi

doi:10.5741/gems.50.1.30

Cited by 22 publications

(29 citation statements)

References 40 publications

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“…We theoretically predict a charge transition level to be 2.71 eV above the valence band maximum. This suggests that photoionization could contribute to spectra by illumination into the phonon sideband under our pump at 450 nm (2.76 eV), as seen with NV 35,36 and SiV centers 37 . We observed fluorescence instability in some centers under blue illumination (Supplemental Materials), which could indicate the presence of an alternate charge state.…”

Section: Discussionmentioning

confidence: 80%

Lead-related quantum emitters in diamond

et al. 2019

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We report on quantum emission from Pb-related color centers in diamond following ion implantation and high temperature vacuum annealing. First-principles calculations predict a negatively-charged Pb-vacancy center in a split-vacancy configuration, with a zero-phonon transition around 2.3 eV. Cryogenic photoluminescence measurements performed on emitters in nanofabricated pillars reveal several transitions, including a prominent doublet near 520 nm. The splitting of this doublet, 2 THz, exceeds that reported for other group-IV centers. These observations are consistent with the PbV center, which is expected to have the combination of narrow optical transitions and stable spin states, making it a promising system for quantum network nodes.

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Section: Discussionmentioning

confidence: 80%

Lead-related quantum emitters in diamond

et al. 2019

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“…As point defects, dislocations, and other extended defects are believed to be the dominant sources of strain in type IIa diamonds (Fisher et al, 2006), HPHT-synthesized diamonds may also exhibit lower strain than their CVD-grown counterparts. While dislocation densities of ≈10 4 − 10 6 cm −2 are typical in CVD-grown diamonds (Achard et al, 2014), certain HPHT-synthesized diamonds can demonstrate dislocation densities of ≈100-1000 cm −2 (Martineau et al, 2009;Tallaire, Mille et al, 2017) and substantially lower strain (D'Haenens-Johansson et al, 2014.…”

Section: Diamond Synthesis and High-pressure-high-temperature (Hphmentioning

confidence: 98%

Sensitivity optimization for NV-diamond magnetometry

et al. 2020

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Solid-state spin systems including nitrogen-vacancy (NV) centers in diamond constitute an increasingly favored quantum sensing platform. However, present NV ensemble devices exhibit sensitivities orders of magnitude away from theoretical limits. The sensitivity shortfall both handicaps existing implementations and curtails the envisioned application space. This review analyzes present and proposed approaches to enhance the sensitivity of broadband ensemble-NV-diamond magnetometers. Improvements to the spin dephasing time, the readout fidelity, and the host diamond material properties are identified as the most promising avenues and are investigated extensively. This analysis of sensitivity optimization establishes a foundation to stimulate development of new techniques for enhancing solid-state sensor performance.

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“…Occasionally, metallic inclusions are present in sufficient concentration in a synthetic diamond to produce a detectable magnetic reaction. The absence of these metallic inclusions, or the absence of a magnetic response, does not exclude HPHT synthetic origin, as research has shown that the magnetic attraction was consistently detected only in the SI-I clarity range (D'Haenens-Johansson et al, 2014). A diamond dealer once related to us the prac-…”

Section: Hpht Synthetic Diamond Growthmentioning

confidence: 99%

“…Blue HPHT synthetics result from the presence of boron within the growth chamber. Colorless HPHT synthetics are reportedly sold as-grown without post-growth color modification (D'Haenens-Johansson et al, 2014), and they often contain small amounts of boron, which does not alter their color (but does impart luminescence).…”

Section: Analysis Of Existing Datamentioning

confidence: 99%

Saltwater Pearls from the Pre- to Early Columbian Era: A Gemological and Radiocarbon Dating Study

Zhou¹,

Hodgins²,

Lange³

et al. 2017

G&G

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Near-Colorless HPHT Synthetic Diamonds from AOTC Group

Cited by 22 publications

References 40 publications

Lead-related quantum emitters in diamond

Lead-related quantum emitters in diamond

Sensitivity optimization for NV-diamond magnetometry

Saltwater Pearls from the Pre- to Early Columbian Era: A Gemological and Radiocarbon Dating Study

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