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Propagation Characteristics of Surface Acoustic Waves under Hexagonal Phononic Gratings
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. (Thin Films Group)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. (Thin Films Group)
2012 (English)In: Proceedings of the IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM, Orlando, USA, 2012, 2503-2506 p.Conference paper, Published paper (Refereed)
Abstract [en]

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.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Engineering Science with specialization in Electronics
Identifiers
URN: urn:nbn:se:uu:diva-189953DOI: 10.1109/ULTSYM.2011.0622ISI: 000309918400602ISBN: 978-1-4577-1252-4 (print)OAI: oai:DiVA.org:uu-189953DiVA: diva2:582592
Conference
IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), 18-21 October, 2011, Orlando, FL, USA
Funder
Swedish Research Council, 2009-5056
Available from: 2013-01-05 Created: 2013-01-05 Last updated: 2013-03-13

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Yantchev, VentsislavKatardjiev, Ilia

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