High-Q one- and two-dimensional phononic cavities

Research Topic

The amplitude of surface acoustic fields can be considerably enhanced by confining them by means of Bragg reflection. This project investigates high-Q acoustic microcavities for SAW confinement consisting of an array of metal stripes on a piezoelectric substrate. This study is motivated both on fundamental and application grounds, being the applications related to a wide range of topics: wave-guide acousto-optical modulation, exciton-phonon coupling and interaction between SAW and superconducting qu-bits, to name a few.


The main goals of the project are the design and fabrication of high-Q SAW cavities as well as the development of 2-D cavities. For this purpose, a model able to predict the relevant physical behavior of such devices is indispensable. By using simulations based on FEM (finite element method) we expect to achieve that.


André Bilobran

Host: University of Valencia – Institute for Material Sciences (ICMUV)

Scientific Background

I received a Bachelor and a Master degree in Physics after attending the Federal University of Parana (Curitiba, Brazil), in 2013 and 2015, respectively. For my Master I developed a theoretical work on Foundation of Quantum Mechanics using tools of Quantum Information Theory. Before that, during my graduation, I worked in a project concerning friction of circular bodies.

Conference/Workshop Contributions
    • High-Q one- and two-dimensional phononic cavities
      A. L. O. Bilobran, M. M. de Lima, P. V. Santos
      SAWtrain Summer School: Physics and applications of GHz vibrations in semiconductors (Cargèse, France, Jul. 11-21, 2017) | Internal