News: PhD. fellowships available
20/01/2010
This Ph.D. project concerns quantum confinement and surface effects involving electrons, phonons and photons
in III-V semiconductor nanowire heterostructures. The morphology of these systems opens the scope of new conceptual
devices based on the surface/volume ratio and the optical response to electromagnetic fields. The experimental
work will consist of several characterization techniques: spectroscopical techniques (Raman, photoluminescence,
time-resolved photoluminescence, photocurrent, etc), structural techniques (AFM, X-ray) or electronic/spin transport.
Contact: Andres.Cantarero@uv.es
The PhD project is focused on the dynamic control of the optical response of photonic devices [1-3] by means
of acoustic phonons in the form of surface acoustic waves (SAWs) [4]. We will combine the understanding of basic
phenomena with the development of novel photonic devices. The successful candidate will have the opportunity to
investigate how to apply fundamental effects typical of quantum mechanical systems (such as acoustic Bloch
oscillations [5]) to obtain an enhanced acousto-optical interaction. We will use advanced concepts for the
simulation, design, fabrication, and demonstration of modulators with multiple gates and high performance
optical switches.
Candidates willing to acquire experience on semiconductor physics, acoustics, and photonics are welcomed.
Contact: mmlimajr@uv.es
[1] M.M. de Lima, Jr., et al., Appl. Phys. Lett. 89, 121104 (2006).
[2] M. Beck et al. Eur. patent appl. EP1990677A1 (2007).
[3] M. Beck et al. Appl. Phys. Lett. 91, 061118 (2007).
[4]M.M. de Lima, Jr. And P.V. Santos, Rep. Prog. Phys. 68, 1639 (2005).
[5] M.M. de Lima, Jr. et al. submitted to Phys. Rev. Lett. (Dec. 2009).
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