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Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate
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10.1063/1.4739950
/content/aip/journal/apl/101/5/10.1063/1.4739950
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/5/10.1063/1.4739950
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) SEM image of the Co/Py chessboard sample, with the Co dots appearing as darker squares, and the chosen unit cell shown as a blue square of side a =  nm. (b) Brillouin p-p polarization spectrum for wavevector q = 0.8π/a along Γ-X. (c) Simulated top-view displacement profiles of observed modes. u, v, and w refer to longitudinal, shear horizontal, and shear vertical displacement components, respectively. (d) Brillouin p-p and p-s polarization spectra for q = 0.8π/a along Γ-M. (e) Simulated top-view displacement profiles of observed modes.

Image of FIG. 2.
FIG. 2.

Experimental and calculated phononic dispersion relations of the Co/Py chessboard sample. Measured p-p and p-s polarization data are denoted by respective red and green dots, and calculated data by pink solid (shear-vertical-dominated modes) and green dashed (longitudinal-dominated modes) curves. Quasi-Rayleigh and quasi-Sezawa wave branches are denoted by RW and SW, respectively, while surface optical-like wave branch by Greek letters. Measured gaps are indicated by green regions.

Image of FIG. 3.
FIG. 3.

(i) Calculated phononic band structures of the Co/Py chessboard sample. Shear-vertical-dominated and longitudinal-dominated modes are represented by pink solid and green dashed curves, respectively. (ii) Schematics of sample (Co – blue and Py – yellow) in real (top) and reciprocal (bottom) space. (iii) The w-displacements (shear vertical), color-coded according to the scale bar of Fig. 1, of selected modes for the M and X points.

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/content/aip/journal/apl/101/5/10.1063/1.4739950
2012-07-30
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/5/10.1063/1.4739950
10.1063/1.4739950
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