One-dimensional modulation of the stripe in a surface phononic lattice: The effect on propagation of surface waves

Brillouin light scattering was applied for the investigation of surface waves propagation in phononic materials made of a silicon substrate loaded with a permalloy layer and a modulated nanostructure of aluminum stripes. The results revealed the impact of one-dimensional modulation of the surface ph...

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Bibliographic Details
Published in:Journal of applied physics 2014-12, Vol.116 (21)
Main Authors: Trzaskowska, A., Mielcarek, S., Wiesner, M.
Format: Article
Language:English
Subjects:
Acoustic propagation
Aluminum
Applied physics
Ferrous alloys
Investigations
Lattice vibration
Light scattering
Magnetic alloys
Modulation
Propagation
Propagation modes
Silicon substrates
Surface acoustic waves
Surface waves
Wave propagation
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Summary:Brillouin light scattering was applied for the investigation of surface waves propagation in phononic materials made of a silicon substrate loaded with a permalloy layer and a modulated nanostructure of aluminum stripes. The results revealed the impact of one-dimensional modulation of the surface phononic crystal on the propagation of surface acoustic waves along the modulated aluminum stripes. The dispersion relation was experimentally and theoretically investigated. The new modes propagating in the investigated structure are localized in the stripes and are defined.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4902894