Broadband and fine-structured luminescence in diamond facilitated by femtosecond laser driven electron impact and injection of 'vacancy-interstitial' pairs
| Autor: | Mayya Uspenskaya, A. O. Levchenko, Sergey I. Kudryashov, E. A. Oleynichuk, O. E. Koval’chuk, Pavel Danilov, Roman A. Khmelnitskii, Michael Kovalev, Nikita Smirnov |
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| Rok vydání: | 2021 |
| Předmět: |
Free electron model
Materials science Band gap Physics::Optics 02 engineering and technology engineering.material 01 natural sciences Molecular physics law.invention 010309 optics Condensed Matter::Materials Science Optics law Vacancy defect 0103 physical sciences Physics::Atomic and Molecular Clusters Physics::Atomic Physics business.industry Diamond 021001 nanoscience & nanotechnology Laser Atomic and Molecular Physics and Optics Femtosecond engineering 0210 nano-technology Luminescence business Ultrashort pulse |
| Zdroj: | Optics letters. 46(6) |
| ISSN: | 1539-4794 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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