Project description DEENESFRITPL Artificial nanoscale earthquakes enter the sub-terahertz regime Surface acoustic waves (SAWs) are sound waves that travel parallel to the surface of an elastic material, for example a piezoelectric material. These nanoscale earthquakes are important in fields ranging from optoelectronics to nanometrology and can be found many devices. However, monitoring them in the frequency range of 100 gigahertz – 1 terahertz is currently not possible. The EU-funded STSAW project is developing superlattices for all-optical monitoring of generation, propagation and detection of sub-terahertz SAW(STSAW). The team will use this platform to study the STSAWs’ behaviours and interactions with other material excitations. The testbench and knowledge attained will further Europe’s competitive position in fields including photonics, phononics, optoelectronics, communications and nanometrology. Show the project objective Hide the project objective Objective The rapid development of not only optoelectronics and electrical signal processing for information and communication technologies, but also fundamental/applied science for nanometrology and nanoimaging, requires monitoring coherent surface acoustic waves (SAWs) with deeply sub-optical localization depths in the currently unexplored frequency range of 100 GHz - 1 THz. While bulk acoustic waves can be monitored up to THz frequencies by ultrafast lasers in superlattices (SLs) with nanometer periodicity, the highest SAW frequencies recorded in metallic gratings deposited on surfaces lie below 100 GHz. The use of SLs cleaved along their growth direction for optical SAW excitation has been proposed though not achieved experimentally. The goal of this project is to demonstrate, for the first time, optical monitoring of sub-THz SAWs (STSAWs) by developing original optoacoustic (OA) and acousto-optic (AO) transducers based on such cleaved SLs and an efficient non-thermoelastic OA conversion. Dedicated numerical modeling will optimize the SL design (dispersion characteristics, OA/AO conversion efficiencies) for STSAW propagation, generation and detection. The atomic-precision fabrication of SLs and use of advanced ultrafast pump-probe laser techniques will fulfill this objective. STSAW interactions with charge carriers and 2D materials will be showcased. The project relies on complementarity and knowledge transfer between applicant (numerical modeling, coherent acoustics control) and host institution (SAW theory, laser monitoring of SAWs); it will expand the applicant's experience and skills, shaping the applicant’s career as an independent researcher. Results will be disseminated via networking, conferences and peer-reviewed publications. This project will greatly enhance Europe's technological competitiveness by pioneering controllable STSAWs and providing a platform to explore the fundamentals of OA/AO conversions at picosecond temporal scale and nanometer spatial scale. Fields of science natural sciencesphysical scienceselectromagnetism and electronicsoptoelectronicsengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsignal processingengineering and technologynanotechnologynano-materialstwo-dimensional nanostructuresnatural sciencesphysical sciencesacousticsnatural sciencesphysical sciencesopticslaser physicsultrafast lasers Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Topic(s) MSCA-IF-2020 - Individual Fellowships Call for proposal H2020-MSCA-IF-2020 See other projects for this call Funding Scheme MSCA-IF-EF-ST - Standard EF Coordinator UNIVERSITE DU MANS Net EU contribution € 196 707,84 Address Avenue olivier messiaen 72085 Le mans France See on map Region Pays de la Loire Pays de la Loire Sarthe Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00
