密度: 1.(密集的程度) density; thickness 短语和例子火力密度 density of fire; 兵力密度 density of troops; 那个国家的人口密度为每平方英里685人。 the population density of that country is 685 per square mile.2.[物理学] (物体的质量和其体积的比值) de
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The thesis also gives the concept of the electromagnetic density of modes ( edom ) . the distribution features of edom in the band - edge of 1d photonic crystal are studied according to the computational results . the dispersive properties of 1d photonic crystal are discussed by introducing the concept of complex effective refractive index 阐述了一维光子晶体中电磁模密度的概念，由计算结果分析了电磁模密度在禁带边缘的分布特点；用复有效折射率讨论了一维光子晶体的色散特性。
