折射率正弦离散变化声子晶体中电磁波的偏振特性

利用特征矩阵法,计算了折射率按正弦规律离散变化的一维声子晶体中TE波和TM波的反射率随入射角变化的规律,得出: TE波和TM波的主禁带有相同的偏振特征,主禁带的入射角范围都较小,在0～0.11rad范围内.主禁带的品质随折射率峰值和周期数的增加而变好.反射波中不会出现"广义布儒斯特角"现象.

Polarization properties of the electromagnetic wave in the photonic crystal with sinusoidal refractive index

By the characteristic matrix methods,the rule about reflectivity changing with the incident angle of the TE wave and the TE wave in the photonic crystal whose refractive index is discontinuous to change with the sinusoidal function is studied. The main forbidden bands of the TE wave and the TM wave contain same characteristics,the scope of the incident angle of the main forbidden band is all small,in 0～0.11 rad. The bigger the amplitude of refractive index and the period number are,the better the quality of the main forbidden band is. There is no “general Brewster's angle”phenomenon in the reflected wave.