Propagation Characteristics of Surface Acoustic Waves under Hexagonal Phononic Gratings
2012 (English)In: Proceedings of the IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM, Orlando, USA, 2012, 2503-2506 p.Conference paper (Refereed)
Dispersion characteristics of surface acoustic waves (SAWs) propagating along the c-plane of single crystalline AlN under 2D tungsten (W) hexagonal gratings are studied using eigen-frequency and frequency response finite element analysis. Specifically, a 2D hexagonal grating with a 10 mu m distance between the W masses is considered and the frequency stopband SAW characteristics studied. For hexagonal W gratings with a thickness above a critical value (about 0.9 mu m in this case) SAW stopbands with a 0 rad and pi/6 rad angle of incidence penetrate in each other thus forming a forbidden SAW frequency band lying between the upper stopband edge of the 0 rad incident SAW and the lower stopband edge of the pi/6 rad incident SAW. In view of the above findings the existence of a complete frequency stopband is discussed.
Place, publisher, year, edition, pages
Orlando, USA, 2012. 2503-2506 p.
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-189953DOI: 10.1109/ULTSYM.2011.0622ISI: 000309918400602ISBN: 978-1-4577-1252-4OAI: oai:DiVA.org:uu-189953DiVA: diva2:582592
IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), 18-21 October, 2011, Orlando, FL, USA
FunderSwedish Research Council, 2009-5056