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The bright white emission from µ-diamonds
Author(s): Wieslaw Strek; Adam Olejniczak; Robert Tomala; Bartłomiej Cichy; Anna Lukowiak; Aliaksandr Zhaludkevich; Alexandra Konovalova; Oleg Ignatenko
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Paper 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.

Paper Details

Date Published: 17 May 2018
PDF: 7 pages
Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 1068307 (17 May 2018); doi: 10.1117/12.2318052
Show Author Affiliations
Wieslaw Strek, Institute of Low Temperature and Structure Research (Poland)
Adam Olejniczak, Institute of Low Temperature and Structure Research (Poland)
Nanores Sp. (Poland)
Robert Tomala, Institute of Low Temperature and Structure Research (Poland)
Bartłomiej Cichy, Institute of Low Temperature and Structure Research (Poland)
Anna Lukowiak, Institute of Low Temperature and Structure Research (Poland)
Aliaksandr Zhaludkevich, Scientific-Practical Material Research Ctr. (Belarus)
Alexandra Konovalova, Scientific-Practical Material Research Ctr. (Belarus)
Oleg Ignatenko, Scientific-Practical Material Research Ctr. (Belarus)


Published in SPIE Proceedings Vol. 10683:
Fiber Lasers and Glass Photonics: Materials through Applications
Stefano Taccheo; Jacob I. Mackenzie; Maurizio Ferrari, Editor(s)

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