The methods employed in studying the wave motion in phononic crystals are based on the plane-wave expansion method and supercell technique. 本研究以平面波展開(kāi)法分析二維聲子晶體其徹體波與表面聲波的波傳行為及頻溝現象，并針對不同效應在調變聲波頻溝上作進(jìn)一步的探討。
Here the plane wave expansion method is adopted for calculating the band structure at each iteration.Then the photonic crystal can be optimized after iterations. 在迭代的過(guò)程中，我們采用平面波展開(kāi)法計算光子晶體之能帶，經(jīng)多次迭代計算后即可合成最佳化之光子晶體。
