Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran.
Opt Lett. 2010 Jun 1;35(11):1759-61. doi: 10.1364/OL.35.001759.
We analytically relate the giant Goos-Hänchen shift, observed at the interface of a high refractive index prism and a waveguide structure with an arbitrary refractive index profile, to the spatial resonance phenomenon. The proximity effect of the high refractive index prism on modal properties of the waveguide is discussed, and the observed shift is expressed in terms of proper and improper electromagnetic modes supported by the waveguide with no prism. The transversely increasing improper modes are shown playing an increasingly important role as the high refractive index prism comes closer to the waveguide.
我们从分析的角度将在高折射率棱镜和具有任意折射率分布的波导结构的界面处观察到的古斯-汉欣位移与空间共振现象联系起来。讨论了高折射率棱镜对波导模态特性的近场效应，并用没有棱镜的波导支持的本征和非本征电磁模式来表示观察到的位移。随着高折射率棱镜越来越靠近波导，横向增加的非本征模式起着越来越重要的作用。
