论文标题
2D时空音调晶体中的带隙调谐
Band-gap tuning in 2D spatiotemporal phononic crystals
论文作者
论文摘要
我们研究了小时空调制在具有较大带隙的亚波长度尺寸晶体中的影响，这对弹性波的频谱在周期性平面上极化。当定期放置在高度对手弹性特性的矩阵内的圆柱体的半径是时间变化时，我们发现，由于整个频谱中的频率谐波的出现，频段间隙的概念通常会被破坏，尽管通常可以使用适当的参数来调节频率，但可能会导致某些频段范围的系统，因此可以保留某些频段范围，以使某些型号的系统保持了调查，因此可以保留此类型号，使得频道范围内部的统一性，这是可以保留的，并且可以保留此类系统。因此，以及用于传感器应用。
We investigate the effect of small spatiotemporal modulations in subwavelength-dimensioned phononic crystals with large band gaps, on the frequency spectrum for elastic waves polarized in the plane of periodicity. When the radius of cylinders periodically placed inside a matrix of highly-contrasting elastic properties is time-varying, we find that due to the appearance of frequency harmonics throughout the spectrum, the notion of a band gap is destroyed in general, although with the appropriate tuning of parameters, in particular the modulation frequency, it is possible that some band-gap region is retained, making such systems possible candidates for tunable bandpass filters or phononic isolators, accordingly, and for sensor applications.
