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 L. O. 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, July 11-21, 2017) | Internal