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|Type:||Artigo de periódico|
|Title:||Coherent acoustic phonons in PbTe quantum dots|
|Abstract:||Femtosecond pump-probe studies at 1.5 mu m of PbTe quantum dots in a glass matrix have revealed oscillations due to a spheroidal acoustic mode. The wavelength dependence of the observed frequencies indicates size selectivity. The frequency and damping of the mode as a function of wavelength agree with the predictions of an acoustic continuum model that suggests that the dominant damping mechanism is radiative loss from the dots to the surrounding glass. (C) 1998 American Institute of Physics. [S0003-6951(98)03241-0].|
|Editor:||Amer Inst Physics|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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