Article,
Coherent acoustic phonons in PbTe quantum dots
APPLIED PHYSICS LETTERS, 73 (15): 2149-2151 (1998)
DOI: 10.1063/1.122406
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.
