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EOI Marie-Skłodowska-Curie Actions: Optomechanical devices based on self-assembled and active materials

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Marie-Skłodowska-Curie Actions - Individual Fellowships 2019

ICN2 Expression of Interest

Group leader:

Prof. Dr. Clivia M. Sotomayor Torres

Scientist in charge of the fellow:

Pedro David Garcia Fernandez

Contact email:

david.garcia@icn2.cat

Brief description of the centre/research group (including URL if applicable) (max 1600 ch): 

The Phononic and Photonic Nanostructures (P2N) group at the Catalan Institute of Nanoscience and Nanotechnology is headed by the ICREA research professor Prof. Dr Clivia M. Sotomayor Torres. The group is currently composed of 16 members: the group leader, two senior researchers, four post-doctoral researchers, five PhD students, one laboratory engineer and a project manager and group administrator.

The P2N group explores the interactions between phonons, photons and electrons in nano-scale condensed matter with a long-term view to develop new information technology concepts where information processing is achieved with novel or multiple state variables. Since its establishment the P2N group has been working in the application of nanofabrication techniques and phonon engineering to tailor dispersion relations for the control of phonon propagation with applications towards opto-mechanical devices. Tuning the phonon dispersion relation, i.e., phonon engineering provides a mean of controlling related properties such as group velocity and, ultimately, phonon propagation, with relevance from sound to heat transport. The P2N group has attained two main breakthroughs in the field of opto-mechanics. The design of opto-mechanical crystals with specific characteristics, i.e., a full phononic bandgap, requires decoupling of the optical and mechanical designs of these structures as demonstrated by us. The group is funded by the EU Commission, the Spanish Ministry and the Catalan Research Agencies and has a strong collaboration with research groups at IEMN (Lille, France), VTT (Espoo, Finland), CNRS (Paris, France), MIT (Cambridge, USA), and UKON (Konstanz, Germany).

Title of project: 

Optomechanical devices based on self-assembled and active materials

Project description (max 1600 ch): 

To engineer and control the overlap of light with the mechanical vibrations of matter in an efficient manner, we make use of very precisely fabricated nanometer-scale devices. The standard way of achieving this control is to use engineered defects in periodic structures - optomechanical crystals (see the Figure) - where the electromagnetic field and the mechanical displacement are confined simultaneously within the same small volume thus enhancing their interaction.

During this project, we will explore novel experimental techniques to explore the optomechanical coupling at the nanoscale. In detail, we will embed light emitters in the form of quantum wells to implement two-way experiments: the coupling of the emitter to the phononic modes of the system induces a modulation of their emission and the presence of the internal emitter can be used to probe the mechanical modes of the system.

We already have the material and we are in the process to fabricate the structures. Our main goals are:

· To explore novel designs for optomechanical structures.

· To measure mechanical cavity modes with an interferometric pump and probe technique.

· To measure the lifetimes of the mechanical resonances versus different structural and physical parameters.

· To measure lasing emission from InGaAsP quantum wells embedded in the structures.

· To measure radiofrequency modulation of the lasing emission induced by the coupling of the emitter with confined mechanical modes.

image

Figure: Optomechanical waveguide fabricated on silicon. This will be our basic geometry to study the effects we describe bellow.

Research area (you may choose more than 1):

Chemistry

CHE

Social Sciences and Humanities

SOC

Economic Sciences

ECO

Information Science and Engineering

ENG

X

Environmental Sciences and Geology

ENV

Life Sciences

LIF

Mathematics

MAT

Physics

PHY