1.5-mu m INTRABAND TRANSITIONS IN PbSe QUANTUM DOTS

Intraband transitions around 1.5 mu m are studied in PbSe quantum dots at RT. Femtosecond pump-probe measurements reveal induced absorption by photoexcited carriers up to higher energy levels and its relaxation. A dominant decay component has a decay time of 10-40 ps, determined by the relaxation of...

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Bibliographic Details
Published inJapanese Journal of Applied Physics, Part 1 Vol. 42; no. 2A; pp. L123 - L125
Main Authors Okuno, T, Ikezawa, M, Masumoto, Y, Hayes, G R, Deveaud, B, Lipovskii, A A
Format Journal Article
LanguageEnglish
Published 01.02.2003
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Summary:Intraband transitions around 1.5 mu m are studied in PbSe quantum dots at RT. Femtosecond pump-probe measurements reveal induced absorption by photoexcited carriers up to higher energy levels and its relaxation. A dominant decay component has a decay time of 10-40 ps, determined by the relaxation of carriers at the lowest absorption peak. The induced absorption is observed in a broad spectral range between 0.77 and 2.5 eV. 18 refs.
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ISSN:0021-4922
DOI:10.1143/JJAP.42.L123