Details

Autor(en) / Beteiligte

• Jani, Mona
• Mrózek, Mariusz
• Nowakowska, Anna M.
• Leszczenko, Patrycja
• Gawlik, Wojciech
• Wojciechowski, Adam M.

Titel

Role of High Nitrogen‐Vacancy Concentration on the Photoluminescence and Raman Spectra of Diamond

Ist Teil von

• Physica status solidi. A, Applications and materials science, 2023-02, Vol.220 (4), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• A photoluminescence (PL) and Raman spectroscopy study of various diamond samples that have high concentrations of nitrogen‐vacancy (NV) color centers up to multiple parts per million (ppm) is presented. With green, red, and near‐infrared (NIR) light excitation, it is demonstrated that while for samples with a low density of NV centers the signals are primarily dominated by Raman scattering from the diamond lattice, for higher density of NVs, a combination of Raman scattering from the diamond lattice and fluorescence from the NV centers is observed, while for the highest NV densities the Raman signals from diamond are completely overwhelmed by the intense NV's fluorescence. However, under NIR excitation, Raman diamond signatures can be observed for some diamonds. These observations reveal different roles of two mechanisms of light emission and contradict the naïve belief that Raman scattering enables the complete characterization of a diamond crystalline sample. Herein, Raman and photoluminescence spectra observed in diamond samples with a high density (ppm level) of nitrogen‐vacancy (NV) color centers. Depending on the NV concentration and excitation wavelength, either a coexistence of the two spectral signatures or a domination of a single one is observed. This observation paves the way to determining NV concentration from optical spectra.