Acoustic phonon modes and phononic bandgaps in GaN/AlN nanowire superlattices
Department of Applied Physics, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628, Japan
Nanoscale Research Letters 2012, 7:479 doi:10.1186/1556-276X-7-479Published: 23 August 2012
We study numerically the phonon dispersion relations and corresponding displacement fields for a circular cross-section nanowire superlattices consisting of anisotropic GaN and AlN. We determine a set of parameters which gives complete phononic bandgaps. The results suggest the potential for manipulating phonons in the micro/nano electromechanical systems.