Anomalous saturation effects due to optical spin depolarization in nitrogen-vacancy centers in diamond nanocrystals

Chapman, Robert and Plakhotnik, Taras (2012) Anomalous saturation effects due to optical spin depolarization in nitrogen-vacancy centers in diamond nanocrystals. Physical Review B: Condensed Matter and Materials Physics, 86 4: 045204.1-045204.8.


Author Chapman, Robert
Plakhotnik, Taras
Title Anomalous saturation effects due to optical spin depolarization in nitrogen-vacancy centers in diamond nanocrystals
Journal name Physical Review B: Condensed Matter and Materials Physics  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2012-07
Sub-type Article
DOI 10.1103/PhysRevB.86.045204
Volume number 86
Issue number 4
ISSN 1098-0121
1550-235X
Start page 045204.1
End page 045204.8
Total pages 8
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2013
Language eng
Formatted abstract The photoluminescence of the negatively charged nitrogen-vacancy (NV−) center displays anomalous saturation behavior at high excitation pulse energies. Where the luminescence is expected to approach a maximum value asymptotically, we have found that it instead drops by as much as a factor of two. In this report, we present evidence that these effects are caused by optical spin depolarization of the NV− center. We show that the presence of an external magnetic field results in a marked decrease in the anomalous character of the NV− centers’ luminescence and demonstrate that low-energy pulses applied after a strong depolarizing pulse can repolarize the spin of the center. We also offer a model and derive important parameters describing dynamics in the NV center and its interaction with light, which quantitatively explain all the observations.
Keyword Fluorescent nanodiamonds
Color-centers
cellular biomarkers
Single-spin
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article
Collections: School of Mathematics and Physics
Official 2013 Collection
 
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