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Post-doctoral Researchers

EOI Marie-Skłodowska-Curie Actions: Surface Phonons in Phononic Crystals and Metamaterials for Hybrid Optoelectromechanical Systems

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Marie-Skłodowska-Curie Actions - Individual Fellowships 2020
ICN2 Expression of Interest

Group leader:
Prof. Dr. Clivia M. Sotomayor Torres

Scientist in charge of the fellow:
Dr. Francesc Alzina

Contact email:
francesc.alzina@icn2.cat

Brief description of the research group:
The Phononic and Photonic Nanostructures Group (P2N) at ICN2 is an international team performing research at the cross roads between nanotechnology and dispersion relation engineering. The P2N group with its group leader has contributed to setup a community on phononics in Europe promoting and participating in many initiatives and projects. These contributions span over the phonon spectrum from phonons in the hypersound to thermal phonons, studying the effects of size reduction, periodicity and disorder, for the manipulation and control of phonons and heat management. The P2N group has also been successful in merging its expertise in optical processes in nanostructures and phononic and photonic engineering to implement hybrid optomechanical systems. This research is anchored in pioneering nanofabrication performed in our group and by collaborators. Candidates will benefit of a strong support during all the grant application process and the experience gained from our considerable success with applications in former MSCA-IF calls.

Title of project:
Surface Phonons in Phononic Crystals and Metamaterials for Hybrid Optoelectromechanical Systems

Project description:
Following our central work on confined elastic waves in ultra-thin membranes or Lamb waves, we have studied two-dimensional (2D) phononic crystal (PnC) silicon membranes by combining different strategies, such us periodic modulation of the elastic constants, and local resonances, in order to change the dispersion of acoustic phonons. We have shown direct experimental evidence of the modification of the dispersion of GHz phonons propagating in the considered PnCs. In-plane confinement was finally reached by designed PnC cavities. The advantage of these unsupported structures is that they ensure the confinement and guiding of the elastic waves, although they add complexity in the fabrication process and limit the integration of phononic elements with photonics and radio-frequency electronics. Therefore, we are presently studying the transformation of the phonon modes in supported films as the basic elements of wave-guiding and confinement. The general objective of the research work is the study of the structuring of these primary elements in the form of PnCs and metamaterials providing access to a variety of supported modes and to a much wider range of material properties. They will establish the conditions for wave-guiding but also for in-plane confinement in supported structures, with potential applications in hybrid RF-connected optical-elastic applications.
This work is supported by the Spanish MICINN project SIP, EU H2020 TOCHA and the ERC Advanced Grant LEIT.
We welcome projects related to theoretical modelling and simulations. Applicants should have a strong background in at least one of the following areas: group theory, solid state physics and classical mechanics.
Projects related to Electro-Opto-mechanical systems design, fabrication and characterization are also welcome. Candidates should have strong background in nanofabrication techniques, electrical engineering or similar.

Research area:

Information Science and Engineering
Mathematics 
Physics 

ICN2 HR will request a letter of motivation, CV (max. 4 pages) and two referees. Do you have any other application instructions?
Please send the abstracts of your MSc dissertation and PhD thesis or a link to the PhD thesis is available.