Broadband and fine-structured luminescence in diamond facilitated by femtosecond laser driven electron impact and injection of "vacancy-interstitial" pairs

Ultrafast heating of photoionized free electrons by high-numerical-aperture (0.25-0.65) focused visible-range ultrashort laser pulses provides their resonant impact trapping into intra-gap electronic states of point defect centers in a natural IaA/B diamond with a high concentration of poorly aggreg...

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Bibliographic Details
Published inOptics letters Vol. 46; no. 6; p. 1438
Main Authors Kudryashov, S I, Khmelnitskii, R A, Danilov, P A, Smirnov, N A, Levchenko, A O, Kovalchuk, O E, Uspenskaya, M V, Oleynichuk, E A, Kovalev, M S
Format Journal Article
LanguageEnglish
Published United States 15.03.2021
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Summary:Ultrafast heating of photoionized free electrons by high-numerical-aperture (0.25-0.65) focused visible-range ultrashort laser pulses provides their resonant impact trapping into intra-gap electronic states of point defect centers in a natural IaA/B diamond with a high concentration of poorly aggregated nitrogen impurity atoms. This excites fine-structured, broadband (UV-near-infrared) polychromatic luminescence of the centers over the entire bandgap. The observed luminescence spectra revealed substitutional nitrogen interaction with non-equilibrium intrinsic carbon vacancies, produced simultaneously as Frenkel "vacancy-interstitial" pairs during the laser exposure.
ISSN:1539-4794
DOI:10.1364/OL.414583