@article {2317,
	title = {Phononic crystals with planar defects},
	journal = {Physical Review B},
	volume = {62},
	year = {2000},
	pages = {5536-5540},
	abstract = {<p>We study the effect of planar defects in phononic crystals of spherical scatterers. It is shown that a plane of impurity spheres introduces modes of vibration of the elastic field localized on this plane at frequencies within a frequency gap of a pure phononic crystal; these show up as sharp resonances in the transmittance of elastic waves incident on a slab of the crystal. A periodic arrangement of impurity planes along a given direction creates narrow impurity bands with a width which depends on the position of these bands within the frequency gap of the pure crystal and on the separation between the impurity planes. We show how a slight deviation from periodicity (one impurity plane is different from the rest) reduces dramatically the transmittance of elastic waves incident on a slab of the crystal.</p>},
	author = {I.E. Psarobas and N. Stefanou and A. Modinos}
}
