Descrizione del progetto
Materiali reattivi aggiungono uno scudo ai dispositivi nanoelettronici
I fononi acustici, i movimenti coerenti degli atomi del reticolo al di fuori delle loro posizioni di equilibrio, di solito compromettono le prestazioni dei dispositivi elettronici e optoelettronici. Queste vibrazioni provocano l’oscillazione degli atomi in un solido, costringendo gli altri elettroni in fase di scorrimento a rimbalzare sulle oscillazioni e a cambiare direzione. Il progetto T-Recs, finanziato dall’UE, adotterà un approccio inaspettato e radicalmente diverso alla progettazione di dispositivi nanofotonici. Incorporerà materiali reattivi che modificano le loro proprietà elastiche in presenza di stimoli esterni e che controllano le vibrazioni del reticolo, trasformandole in un vantaggio. Determinati composti, tra cui il biossido di vanadio, verranno integrati in semiconduttori nanofotonici per la loro capacità di innescare una transizione di fase termicamente, otticamente o elettricamente.
Obiettivo
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.
Campo scientifico
- natural sciencesphysical scienceselectromagnetism and electronicsoptoelectronics
- natural scienceschemical sciencesinorganic chemistrytransition metals
- natural sciencesphysical sciencesatomic physics
- natural sciencesphysical sciencesacoustics
- natural sciencesphysical sciencescondensed matter physicssolid-state physics
Programma(i)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Argomento(i)
Meccanismo di finanziamento
HORIZON-AG - HORIZON Action Grant Budget-BasedIstituzione ospitante
75794 Paris
Francia