Non-Linear Surface acoustic wave platform enabled by spin wave hybridization

Description of the Laboratory:

The FEMTO-ST institute (www.femto-st.fr) is a multidisciplinary research institute composed of seven departments covering numerous domains of engineering sciences and including more than 500 scientific, administrative and technical support staff. About 225 PhD students receive a high-leveltraining in scientific research. It is one of the most competitive research institutes in France and isamong the leaders in the world on Engineering for micro and nanoscale. One of the key research topics at FEMTO-ST institute is the development of devices based on electroactive materials with particular emphasis on microelectromechanical systems (MEMS), photonics, electro-optics, phononics, acousticsand robotics. FEMTO-ST institute has a microfabrication technology center with clean room facilities MIMENTO mixing technologies from microelectronics to micromechanics. MIMENTO is a member of the national network of the seven largest clean rooms in France (RTB).

The PhD thesis will be performed by crossing the expertise of two research groups of FEMTO-ST: PiezoMEMS group of the Time & Frequency Department and Phononics group of the MN2S Department.

PiezoMEMS group: The link between research and lead-free piezoelectric industry has been the DNA ofFEMTO-ST for more than 60 years, with the development of quartz in metrology and for 30 years withthe development of LiNbO3 devices. Our current team gathers researchers in electronics and instrumentation of resonator metrology, in material science, in modelling and simulations in mechanical and electronic, and in microfabrication of piezoelectric and electronic packaging. Over the past 6 years, our group filed 6 patents, published 100 regular articles, received 8 PhD awards in conferences, a Grand Prix i-PhD (BPI France) and a professor member of the Institut Universitaire deFrance. PiezoMEMS is the biggest academic user of MIMENTO facilities and world leader of MOCVD growth of LiNbO3. For more information you can view our website : https://teams.femto-st.fr/piezomems/ & http://members.femto-st.fr/ausrine-bartasyte/

Phononics and Microscopy group: The group stands at the crossroad of phononics (the analysis and the control of phonons), of metamaterials (artificial materials whose properties are dictated by structure rather than composition), of wave physics, and of micro-instrumentation (the metrology of physical phenomena at the micro scale and below). Within phononics, the group is recognized internationally for contributions to phononic crystals, notably at the microscale and for theory, for metamaterials of different types, as well as for the study of the interaction of photons and phonons (Brillouin light scattering, optoacoustics). Over the years, the group has accumulated a lot of experience about the numerical simulation of surface acoustic wave devices, especially on lithium niobate and other piezoelectric substrates.

https://teams.femto-st.fr/phononics-microscopy/en

https://members.femto-st.fr/vincent-laude/en