Aperiodic thin film filters for acoustic phonons

N. D. LANZILLOTTI-KIMURA, A. FAINSTEIN, B. JUSSERAND, A. LEMAITRE, O. MAUGUIN, AND L. LARGEAU

Paris, Francia

Conferencia; 12th International Conference on Phonon Scattering in Condensed Matter “Phonons 2007”; 2007

We describe multilayer acoustic nanowave devices based on aperiodic stacks of GaAs and AlAs layers and achievable with standard Molecular Beam Epitaxy (MBE) technology. These nanostructures were designed to display optimized acoustic reflectivity curves in the terahertz range. We address the design and optimization of these devices using a downhill simplex algorithm. We analyze different strategies of optimization, and we study the different engineering parameters relevant for the conception of aperiodic filters.