Aktivität: Präsentation oder Vortrag › Geladener Gastvortrag
Beschreibung
Acoustic wave propagation control along boundaries between fluids and hard grooved surfaces will be presented, including dispersion relation and propagation constant control in slow-wave regime. Based on this concept, acoustic Mach-Zhender modulator realized on hard grooved surface and its applications (sensing, modulation, etc) will be described. Besides traditional propagation control by changing geometry, controlling surface acoustic waves with temperature will be shown as an alternate solution. This concept significantly increases the versatility of applications such as sound trapping, acoustic spectral analysis and sensing, by providing a simple mechanism for modifying their behavior without any change in the geometry of the system. Temperature-controlled gradient refractive index (GRIN) acoustic medium and its application in achieving tunable lens for wave bending and focusing will also be presented.