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本文利用电磁场数值计算方法研究了横截面具有不同长宽比例的电介质柱的电磁共振模式,发现横截面长宽比例影响电介质柱共振模式的激发顺序.截面长宽比小于2.2时,首先激发磁共振模式;而长宽比大于2.2时,磁共振模式在第二个共振被激发;作为转折点,截面长宽比例约为2.2的电介质柱不能激发磁共振模式.结果还表明改变电磁波入射方向可以调节长方形截面的电介质柱的磁共振发生的频率位置,实现偏振可控的电磁响应,这为新颖的电介质电磁超介质的设计与研究提供有价值的信息.
In this paper, the electromagnetic resonance modes of dielectric columns with different aspect ratios were studied by using the numerical calculation method of electromagnetic field. It was found that the length-width ratio of cross-sections affected the excitation order of resonant modes of dielectric columns. When the aspect ratio was less than 2.2, Mode; when the aspect ratio is greater than 2.2, the magnetic resonance mode is excited at the second resonance; as a turning point, the dielectric column with the aspect ratio of about 2.2 can not excite the magnetic resonance mode. The results also show that changing the incident direction of the electromagnetic wave can adjust the rectangle Section of the dielectric column magnetic resonance frequency position to achieve polarization-controlled electromagnetic response, which provides valuable information for the design and research of novel dielectric electromagnetic supermedia.