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Resonant slow modes in phononic crystal plates with periodic membranes
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10.1063/1.3464955
/content/aip/journal/apl/97/3/10.1063/1.3464955
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/3/10.1063/1.3464955
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic of the unit cell of the square-lattice PC plate with periodic membranes. (b) Picture of the specimen. (c) Full section view of the unit cell.

Image of FIG. 2.
FIG. 2.

Reference spectrum measured on the membrane surface from the laser source along the direction (solid line) and the spectrum measured on the uniform steel plate of thickness (dashed line).

Image of FIG. 3.
FIG. 3.

Band structures of the PC plate with (dots) and without (solid curves) the membrane layer.

Image of FIG. 4.
FIG. 4.

Mode shapes of the resonant slow modes in the complete PBG (modes F). (a) The lower mode (red band). (b) The higher mode (blue band).

Image of FIG. 5.
FIG. 5.

Wavelet coefficients in the frequency-time domain of the measured signal along the direction with traveling distances equal to , , , and .

Image of FIG. 6.
FIG. 6.

Calculated group velocities of the second order dipole modes as a function of frequency.

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/content/aip/journal/apl/97/3/10.1063/1.3464955
2010-07-19
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Resonant slow modes in phononic crystal plates with periodic membranes
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/3/10.1063/1.3464955
10.1063/1.3464955
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