The leaky mode resonance condition ensures 100% diffraction efficiency of mirror-based resonant gratings

被引:36
作者
Flury, Manuel [1 ]
Tishchenko, Alexandre V. [1 ]
Parriaux, Olivier [1 ]
机构
[1] Lab Hubert Curien, CNRS UMR 5516, F-42000 St Etienne, France
关键词
gratings; leaky waves; nonhomogeneous media; resonance; waveguide;
D O I
10.1109/JLT.2007.899187
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The resonance condition of a leaky mode propagating in a dielectric multilayer, which is supported by a mirror and excited by a free space wave from the cover medium, is simply derived from the phase of the reflection at the mirror and cover interfaces. The leaky mode resonance is used to obtain 100% -1st order diffraction efficiency in a reflection resonant grating by destructive interference in the direction of Fresnel reflection. A number of examples support the validity of this condition for high efficiency and illustrate the usefulness of this intelligible representation of the diffraction phenomena for the synthesis of novel diffractive elements.
引用
收藏
页码:1870 / 1878
页数:9
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