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  4. 1.5-mu m intraband transitions in PbSe quantum dots
 
research article

1.5-mu m intraband transitions in PbSe quantum dots

Okuno, T.
•
Ikezawa, M.
•
Masumoto, Y.
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2003
Japanese Journal of Applied Physics Part 2 : Letters

Intraband transitions around 1.5 mum are studied in PbSe quantum dots at room temperature. 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, which is 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.

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