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Highly intensive emission of the NV− centers in synthetic HPHT microdiamonds at low nitrogen doping

MetadataDetails
Publication Date2018-08-01
JournalAPL Materials
AuthorsKirill Bogdanov, M. V. Zhukovskaya, V. Yu. Osipov, Elena V. Ushakova, М. А. Баранов
InstitutionsHosei University, Columbus NanoWorks (United States)
Citations32

Synthetic high-pressure high-temperature (HPHT) microdiamonds demonstrate strong resonant-like enhancement of the NV− photoluminescence (PL) at unexpectedly low concentration of the substitutional nitrogen atoms (NS) of 90 ppm, which is significantly smaller than the ∼250 ppm characteristic for conventional HPHT synthesis. The EPR, Raman, and luminescent spectroscopies, including time-resolved PL, provide evidence that this is due to competition between the increase in PL with increasing concentration of the NV− centers and nonradiative deactivation of these centers by defects induced by the NS in the diamond crystal lattice. It is suggested that the intensity of the NV− center emission can be optimized by the appropriate choice of nitrogen doping concentration which does not substantially disrupt the diamond crystal lattice.

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