Hypersonic phonon propagation in one-dimensional surface phononic crystal
Graczykowski, Bartlomiej (Institut Català de Nanociència i Nanotecnologia)
Sledzinska, Marianna (Institut Català de Nanociència i Nanotecnologia)
Kehagias, Nikolaos (Institut Català de Nanociència i Nanotecnologia)
Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia)
Reparaz, Juan Sebastian (Institut Català de Nanociència i Nanotecnologia)
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)

Date:	2014
Abstract:	Hypersonic, thermally activated surface acoustic waves propagating in the surface of crystalline silicon patterned with periodic stripes were studied by Brillouin light scattering. Two characteristic directions (normal and parallel to the stripes) of surface acoustic waves propagation were examined exhibiting a distinctive propagation behavior. The measured phononic band structure exhibits diverse features, such as zone folding, band gap opening, and hybridization to local resonance for waves propagating normal to the stripes, and a variety of dispersive modes propagating along the stripes. Experimental results were supported by theoretical calculations performed using finite element method.
Grants:	European Commission 309150 Ministerio de Ciencia e Innovación CSD2010-0044 Ministerio de Economía y Competitividad MAT2012-31392
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Brillouin light scattering ; Crystalline silicons ; Dispersive modes ; Phonon propagation ; Propagation behavior ; Surface acoustic waves ; Theoretical calculations ; Thermally activated
Published in:	Applied physics letters, Vol. 104, Issue 12 (March 2014) , art. 123108, ISSN 1077-3118

DOI: 10.1063/1.4870045

5 p, 2.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles