The bright white emission of µ-diamonds

• DOI: 10.1117/12.2318052
• Publication Date: 2018-05-17T13:59:42Z
• Authors: Wieslaw Strek; Robert Tomala; Adam Olejniczak; Anna Lukowiak; Oleg Ignatenko; Bartłomiej Cichy; Aliaksandr Zhalud...; Alexandra Konovalova
• Keywords: 02 engineering and technology; 0210 nano-technology

The synthetic µ-diamonds powder was synthesized using high pressure temperature technique. metal-catalyst effect used to reduce the and of diamonds synthesis. irradiation by focused beam 975 nm laser diode lead obtain intense broadband white emission with maximum at 620 nm. This type generation were described earlier for graphene ceramic foam. μ-diamonds is characterized low threshold power excitation strong dependence ambient pressure. It suggested that light observed from samples may originate laser-induced sp²↔sp³ hybridization change as a result mechanism analogous intervalence charge transfer in Sr₂CeO₄ nanocrystals. Similar can occur resulting intense, bright emission.