Dispersion properties of two-dimensional phonon crystals with a hexagonal structure |
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| Authors: | S P Nikitenkova and A I Potapov |
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| Institution: | 1.Nizhni Novgorod State Technical University,Nizhni Novgorod,Russia |
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| Abstract: | Acoustic and optical properties of two-dimensional phonon crystals with a hexagonal symmetry are described. Differential-difference
equations describing plane oscillations of a two-dimensional lattice of material structures are derived in a harmonic approximation,
and dispersion dependences of acoustic and optical phonons are calculated. Branches of optical oscillations and intervals
of forbidden frequencies are shown to appear when a lattice consists of two types of atoms. |
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