手征超材料板反射的电磁波的古斯-汉钦位移
Goos-Hänchen shifts of an electromagnetic wave reflected from a chiral metamaterial slab
摘要：
将Artmann公式应用于TE偏振入射波，我们从理论上证明了在手性超材料板的反射的伪Brewster倾角附近的Goos-Hänchen（GH）位移可以大大增强。GH位移观察到的反射场的平行和垂直分量。此外，还发现GH位移不仅与平板厚度和入射角有关，还与手征介质的本构参数有关。特别是当入射角接近LCP波的全反射临界角时，可以获得GH位移的显著增强。最后，通过对高斯光束的数值模拟，验证了稳态相位分析的有效性。
英文摘要：
Applying Artmann's formula to the TE-polarized incident waves, we theoretically show that the Goos-Hänchen (GH) shifts near the angle of the pseudo-Brewster dip of the reflection from a slab of chiral metamaterial can be greatly enhanced. The GH shifts are observed for both parallel and perpendicular components of the reflected field. In addition, it is found that the GH shifts depend not only on the slab thickness and the incident angle, but also on the constitutive parameters of the chiral medium. In particular, when the incident angle is close to the critical angle of total reflection for LCP wave, significant enhancement of the GH shifts can be obtained. Finally, the validity of the stationary-phase analysis is demonstrated by numerical simulations of a Gaussian-shaped beam.
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