Evidence of fano-like interference phenomena in locally resonant materials.
Sonic crystals consisting of three-dimensional arrays of units which exhibit localized resonances have been discovered recently. Here, it is shown that their two-dimensional counterparts behave in a similar manner. Particularly, it is observed that the transmittance spectra show very asymmetric peaks which are explained as a Fano-like interference phenomenon. A finite difference time domain method is employed to perform a comprehensive study of the resonance line shape as a function of the mass density of the structural units. Also, a simple analytical model is introduced to give an intuitive account of the origin of the interference phenomenon.
Goffaux
C
C
Departamento de Física Teórica de la Materia Condensada, Facultad de Ciencias (C-5), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
Sánchez-Dehesa
J
J
Yeyati
A Levy
AL
Lambin
Ph
P
Khelif
A
A
Vasseur
J O
JO
Djafari-Rouhani
B
B