平面波在有时变磁等离子体片空间中的传播

Plane wave Propagation through a Time-varying Magnetoplasma Slab in Free Space

本文首次对平面波在有时变磁等离子体片的自由空间中的传播进行了分析。所得结果表明，沿正Ｚ轴传播的平面波（入射波）在磁等离子体片中激励起十一个波，除两个波外，其余波的频率均与入射波频率ω０不相等。其中两个沿正Ｚ轴方向传播，一个沿负Ｚ轴方向传播，这三个波的波数不变；另外八个波的波数与ω０无关，片两边的自由空间有两项场分量。当电子回旋角频率ωｃ为０时，其结论与文献［６］给出的为各向同性等离子体片时的一致；片厚ｄ→∞时，则可得到为磁等离子体半空间时的结论。

Plane wave propagation through a time-varying magnetoplasma slab in free space is investigated in this paper. Results show that a plane wave(the incident wave) propagating ahing positive z-direction induces eleven new waves in the magnetopfasma slab. Except two of them, the frequencies of the new waves are different from the one of the incident wave(ω0). Two of the waves propagate along the peitive z--direction, one along the negative. Wave numbers of these three waves are kept the same as the one of the incident wave. The other eight waves induced in the slab have wave numbers independent of ω0. Outside of the slab, there are two modes of wave field. If the gyrofrequency ωc= 0, the reults are coincident with the ones in reference [6]. When the slab thickness d→∞, the results of propagation in a magnetoplasma half-space can be obtained.