[Alumnos] Coloquios DF: Bernard Jusserand (Inst. Nanosciences Paris, UPMC)- Jueves 7/3, 14hs, Aula Seminario, 2do piso, Pab. I

[Lista de los Alumnos del Departamento de Fisica]

El próximo jueves 7/3 a las 14hs realizamos el primer coloquio DF de este
año,

COLOQUIOS DEL DEPARTAMENTO DE FÍSICA FCEYN - UBA

En el Aula Seminario, 2do piso, Pab. I, 

Jueves 7/3, 14hs:

Bernard Jusserand

Institut Des Nanosciences De Paris, UPMC-CNRS.

 
 

SON ET LUMIèRE : A COMBINED ENGINEERING OF PHOTONS AND ACOUSTIC PHONONS IN
SEMICONDUCTOR NANOSTRUCTURES

Abstract:
   Semiconductor superlattices are periodic stacks of two different
materials, such as GaAs and AlAs, well known for their novel electronic and
photonic properties. In this talk, I will present the ideas which we
developed in the past years, how to transfer the same ideas to the field of
acoustic phonons in multilayers. I will recall the concepts of folded
acoustic phonon in a periodic multilayer stack and of cavity phonons in a
novel device: the acoustic nanocavity.

Using pump-probe and Raman scattering experiments, we have demonstrated
that the acoustic nanodevices are very efficient generators and detectors
of quasi-monochromatic acoustic wave packets up to frequencies around 1 THz
and that their properties can be widely engineered by adjusting the devices
parameters and the transduction wavelength. High resolution Raman
scattering (10-2 cm-1) also allowed us to determine the lifetime of
acoustic phonons confined in nanocavities.
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: http://mail.df.uba.ar/pipermail/alumnos/attachments/20130228/be04556c/attachment.html