Projektbeschreibung
Reaktionsfähige Werkstoffe bieten Abschirmung für nanoelektronische Vorrichtungen
Akustische Phononen, kohärente Bewegungen von Gitteratomen außerhalb ihrer Gleichgewichtslage, beeinträchtigen gewöhnlich die Leistung elektronischer und optoelektronischer Bauelemente. Diese Schwingungen bringen die Atome in einem Festkörper zum Schwingen, wodurch andere fließende Elektronen an diesen Schwingungen abprallen und ihre Richtung ändern. Das EU-finanzierte Projekt T-Recs verfolgt einen radikal anderen und kontraintuitiven Ansatz bei der Entwicklung von Nanophotonik-Bauteilen, indem es reaktionsfähige Materialien einbezieht, die ihre elastischen Eigenschaften unter äußeren Reizen ändern und Gitterschwingungen kontrollieren, um sie in einen Vorteil zu verwandeln. Bestimmte Verbindungen, wie z. B. Vanadiumdioxid, werden in nanophotonische Halbleiter integriert, da sie in der Lage sind, einen Phasenübergang thermisch, optisch oder elektrisch auszulösen.
Ziel
In solid-state physics, all the properties determined by the atoms' position are susceptible to be modified by acoustic phonons. Acoustic phonons are usually seen as a primary source of unwanted effects in electronics, optoelectronics, and quantum technologies based on solid-state platforms. This project proposes a series of tunable nanodevices where acoustic-phonons constitute, instead, a central resource to unveil wavelength conversion phenomena, transfer information, and simulate systems difficult or impossible to study in optics and electronics.
The current trend in nanophononics is to engineer acoustic nanodevices to shape the local acoustic density of states, tailor the light-matter interaction, or enhance the interactions with other systems based on static and predetermined fixed-function nanostructures. This project takes a radically different direction by incorporating responsive materials that change their elastic properties under external stimuli. GeSbTe compounds and vanadium dioxide present phase transitions that can be triggered thermally, optically, or electrically and have associated ultrafast changes in their elastic properties. These materials, widely used in active photonics and electronics, will be integrated into nanophononic semiconductor and oxide-based resonators working in the GHz-THz range.
The project is organized around three major challenges: i) To develop hybrid tunable acoustic-phonon resonators and transducers based on materials presenting structural phase transitions. ii) To develop reconfigurable nanophononic lattices (i.e. artificial graphene) formed by coupled resonators. And iii) To demonstrate novel acoustic-phonon wavelength conversion phenomena, simulate time-dependent Hamiltonians, and develop dynamical acoustic phonon devices. Using dynamical structures to control acoustic phonons in the GHz-THz range will enable a new dimension in the solid-state physics toolbox.
Wissenschaftliches Gebiet
- natural sciencesphysical scienceselectromagnetism and electronicsoptoelectronics
- natural scienceschemical sciencesinorganic chemistrytransition metals
- natural sciencesphysical sciencesatomic physics
- natural sciencesphysical sciencesacoustics
- natural sciencesphysical sciencescondensed matter physicssolid-state physics
Programm/Programme
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Thema/Themen
Finanzierungsplan
HORIZON-AG - HORIZON Action Grant Budget-BasedGastgebende Einrichtung
75794 Paris
Frankreich