m-bonacci metamaterial multilayers: location of the zero-average index bandgap edges.
We examine quasiperiodic multilayers arranged in m-bonacci sequences, which combine ordinary positive-index materials and dispersive metamaterials with negative index in a certain frequency range. When the volume-averaged refractive index of the nonperiodic multilayer equals zero, the structure does not propagate light radiation and exhibits a forbidden band. We identify some analytical expressions to determine the upper and lower limits of the above zero-average refractive-index bandgap. We recognize that these limits are not explicitly dependent on the geometrical parameters of the stack of layers.
Centro de Tecnologías Físicas, Universidad Politécnica de Valencia, E-46022 Valencia, Spain. jmonsori@fis.upv.es
J A
JA
Monsoriu
R A
RA
Depine
M L
ML
Martínez-Ricci
E
E
Silvestre
P
P
Andrés