The bright white emission from µ-diamonds

Wieslaw Strek; Adam Olejniczak; Robert Tomala; Bartłomiej Cichy; Anna Lukowiak; Aliaksandr Zhaludkevich; Alexandra Konovalova; Oleg Ignatenko

doi:10.1117/12.2318052

17 May 2018 The bright white emission from μ-diamonds

Wieslaw Strek, Adam Olejniczak, Robert Tomala, Bartłomiej Cichy, Anna Lukowiak, Aliaksandr Zhaludkevich, Alexandra Konovalova, Oleg Ignatenko

Author Affiliations +

Proceedings Volume 10683, Fiber Lasers and Glass Photonics: Materials through Applications; 1068307 (2018) https://doi.org/10.1117/12.2318052
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

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

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Wieslaw Strek, Adam Olejniczak, Robert Tomala, Bartłomiej Cichy, Anna Lukowiak, Aliaksandr Zhaludkevich, Alexandra Konovalova, and Oleg Ignatenko "The bright white emission from μ-diamonds", Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 1068307 (17 May 2018); https://doi.org/10.1117/12.2318052

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