Ultrasonic transmission through multiple-sublattice subwavelength holes arrays

The ultrasonic transmission through plates perforated with 2 x 2 or 3 x 3 square array of subwavelength holes per unit cell are studied by numerical simulations. Calculations are obtained by means of a theoretical model under the rigid-solid assumption. It is demonstrated that when the inter-hole distance within the unit cell is reduced, new transmission dips appear resulting from Wood anomalies that have influence on the second and the third order Fabry-Perot peak. When the inter-hole distance within the unit cell is reduced, the transmission spectrum of the multiple-sublattice holes arrays tends to the transmission spectrum of a plate perforated with only one hole in the unit cell. (C) 2011 Elsevier B.V. All rights reserved.This work has been supported by the Spanish MICINN (MAT2010-16879), Generalitat Valenciana (PROMETEO 2010/043) and Universidad Politecnica de Valencia (PAID-06-10-1839). H.E. acknowledges the support of CSIC-JAEpredoc scholarship.Estrada Beltrán, HA.; Gómez Lozano, V.; Uris Martínez, A.; Candelas Valiente, P.; Belmar Ibáñez, F.; Meseguer Rico, FJ. (2012). Ultrasonic transmission through multiple-sublattice subwavelength holes arrays. Ultrasonics. 52(3):412-416. https://doi.org/10.1016/j.ultras.2011.09.00741241652