Acoustic phonon modes and phononic bandgaps in GaN/AlN nanowire superlattices.
: 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.
Department of Applied Physics, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628, Japan. mizuno@eng.hokudai.ac.jp.
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Mizuno