INVESTIGADORES
FAINSTEIN Alejandro
congresos y reuniones científicas
Título:
Decoupling of optical generation and detection of acoustic phonons in semiconductor superlattices
Autor/es:
M. F. PASCUAL WINTER, A. FAINSTEIN, B. JUSSERAND, B. PERRIN, AND A. LEMAITRE
Lugar:
Paris, Francia
Reunión:
Conferencia; 12th International Conference on Phonon Scattering in Condensed Matter Phonons 2007; 2007
Resumen:
We present a study of the generation and detection of terahertz acoustic phonons
in GaAs/AlAs superlattices through femtosecond pump and probe optical pulses, where the
spectral contributions of the generation and detection processes are decoupled and identified.
The processes are spatially separated in different superlattices grown with an intermediate 1-µmthick
GaAs layer. Pumping and probing occur on opposite superlattices. A thickness gradient
present on one of the superlattices allows us to identify the features in the spectra resulting
either from the generation or from the detection. A Raman scattering characterization of the
sample is also presented.µmthick
GaAs layer. Pumping and probing occur on opposite superlattices. A thickness gradient
present on one of the superlattices allows us to identify the features in the spectra resulting
either from the generation or from the detection. A Raman scattering characterization of the
sample is also presented.