【摘 要】
：
Sonic crystal,analogous to photonic crystal,has been studied over two decades.Some of important effects,such as band-gap,dispersion relation,have been well
【机 构】
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NationalLaboratoryofSolid-StateMicrostructuresandDepartmentofMaterialsScienceandEngineering,NanjingU
【出 处】
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The 2nd International Conference on Phononics and thermal En
论文部分内容阅读
Sonic crystal,analogous to photonic crystal,has been studied over two decades.Some of important effects,such as band-gap,dispersion relation,have been well established in it.In recent years,the abnormal phenomena,such as negative refraction,enhanced transmission of acoustic waves in sub-wavelength,and negative bulk modulus and negative mass density,etc.,were founded.Much less velocity of acoustic wave than light makes it easier to directly measure its amplitude and phase of propagation,and thus provides important compensated evidence to establish basic effects shared by both photonic crystals and sonic crystals.We will describe some results we got in unidirectional propagation of acoustic waves,zero refraction index in acoustic Dirac cone,and surface acoustic wave sonic crystals operation in high frequency.These results may find new applications in the acoustic devices applications,and could be extend to heat manipulation.
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