Widening of phononic transmission gaps via Anderson localization.
We demonstrate the existence of strong Anderson localization in certain disordered phononic systems. As a result, the transmission coefficient of elastic waves through a slab of the material practically vanishes, whatever the angle of incidence, over a region of frequency much wider than the absolute frequency gap of the corresponding ordered system. The phenomenon can be of use in the design of phononic systems with very wide absolute transmission gaps.
Sainidou
R
R
Department of Physics, National Technical University of Athens, Zografou Campus, GR-157 80 Athens, Greece.
Stefanou
N
N
Modinos
A
A