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Ultrafast photoluminescence dynamics of biexcitons in a CuCl thin film grown by vacuum deposition
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Titel: |
Ultrafast photoluminescence dynamics of biexcitons in a CuCl thin film grown by vacuum deposition |
In: | physica status solidi c, 3, 2006, 10, S. 3464-3467 |
veröffentlicht: |
Wiley
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Umfang: | 3464-3467 |
ISSN: |
1862-6351 1610-1642 |
DOI: | 10.1002/pssc.200672146 |
Zusammenfassung: | <jats:title>Abstract</jats:title><jats:p>We have investigated the ultrafast dynamics of the biexciton photoluminescence (PL) in a 500‐nm thick CuCl thin film at 10 K using an optical Kerr gating method with a time resolution of ∼1 ps. The CuCl thin film was grown by vacuum deposition. It is found that the biexciton‐PL intensity has an excitation‐power dependent rise time, which reflects the formation process of biexcitons, while its decay time is independent of the excitation power: 6.0 ps that is dominated by the transit time of the exciton polaritons travelling through the thin film. Furthermore, from the time‐resolved PL spectra of the biexciton, we have observed a peak shift as a function of time, which is connected with the heating and cooling processes of the effective temperature in the excitonic system. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |