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Negatively charged nitrogen-vacancy (NV-) centers in diamond produce a characteristic optical zero-phonon line (ZPL) at 637 nm. This emission line can be observed under optical excitation (i.e. photoluminescence), but is rarely observed under electron excitation (i.e. cathodoluminescence). This study reports that low-temperature (80 K) and low energy (5 keV) cathodoluminescence spectroscopy is able to detect emission peak or spectral dip at the ZPL of NV- centers. The spectral dip was observed in the diamond samples with high concentration of NV- centers produced by high-energy (2 MeV) e-beam (EB) irradiation. The effects of EB irradiation fluence, NV- centers concentration and substitutional nitrogen concentration on the formation of spectral dip were
discussed, and a model based on the NV- absorption of NV0 emission sideband is proposed.

権利情報:

• In Copyright
  

キーワード: NV- centers , Diamond, Cathodoluminescence, Spectral dip

刊行年月日: 2024-08-13

出版者: Elsevier BV

掲載誌:

• DIAMOND AND RELATED MATERIALS (ISSN: 09259635) vol. 148 1111476

研究助成金:

• Government of Japan Ministry of Education Culture Sports Science and Technology
• Japan Society for the Promotion of Science
• Ministry of Internal Affairs and Communications
• Japan Science and Technology Agency

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.4726

公開URL: https://doi.org/10.1016/j.diamond.2024.111476

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更新時刻: 2024-09-05 16:30:23 +0900

MDRでの公開時刻: 2024-09-05 16:30:24 +0900