Quantum confinement effects on optical transitions in nanodiamonds containing nitrogen vacancies
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2016-10-03 |
| Journal | Physical review. B./Physical review. B |
| Authors | Alessio Petrone, Joshua J. Goings, Xiaosong Li |
| Institutions | University of Washington |
| Citations | 44 |
Abstract
Section titled âAbstractâColored nitrogen-vacancy (NV) centers in nanosize diamonds ($d\ensuremath{\sim}5$ nm) are promising probe materials because their optical transitions are sensitive to mechanical, vibrational, and spin changes in the surroundings. Here, a linear response time-dependent density functional theory approach is used to describe the optical transitions in several NV-doped diamond quantum dots (QDs) in order to investigate size effects on the absorption spectra. By computing the full optical spectrum up to band-to-band transitions, we analyze both the localized âpinnedâ midgap and the charge-transfer excitations for an isolated reduced NV center. Subband charge-transfer excitations are shown to be size dependent, involving the excitation of the dopant $s{p}^{3}$ electrons to the diamond conduction band. Additionally, the NV-doped systems exhibit characteristic $s{p}^{3}\ensuremath{-}s{p}^{3}$ excitations whose experimental energies are reproduced well and do not depend on QD size. However, the NV position and global cluster symmetry can affect the amount of the energy splitting of the vertical excitation energies of the midgap transitions.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
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