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| Authors | W.D.A.M. de Boer, D. Timmerman, T. Gregorkiewicz, H. Zhang, W.J. Buma, A. N. Poddubny, A.A. Prokofiev, I.N. Yassievich | | Title | Self-trapped exciton state in Si nanocrystals revealed by induced absorption |
| Journal | Physical Review B |
| Volume | 85 |
| Year | 2012 |
| Issue | 16 |
| Pages | 5 |
| ISSN | 10980121 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Van 't Hoff Institute for Molecular Sciences (HIMS) |
| Abstract | We report results of time-resolved induced absorption (IA) spectroscopy on Si nanocrystals (Si NCs) embedded in a SiO2 matrix. In line with theoretical modeling, the IA amplitude decreases with probing photon energy, however only until a certain threshold value. For larger photon energies, an increase of IA is observed. This unexpected behavior is interpreted in terms of the self-trapped exciton state whose formation in Si NCs was put forward some time ago based on theoretical considerations. Here, we present a direct experimental confirmation of this supposition. |
| Document type | Article |
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