Optical excitation of surface plasmon polaritons on 90° and 60° bi-gratings
Optical excitation of surface plasmon polaritons on 90° and 60° bi-gratings
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90° 和 60° 双光栅上表面等离子体激元的光激发
DOI：
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发表时间：
1996
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通讯作者：
J. Sambles
中科院分区：
文献类型：
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作者：
Richard A. Watts;J. Harris;A. Hibbins;T. W. Preist;J. Sambles
摘要本文介绍了在金双光栅结构上进行的表面等离子体激元的实验研究。实验观察到的模式的位置所产生的二维倒易晶格由这些表面提供的一些详细的调查，并从表面等离子体共振和临界边缘位置的位置的信息，两个不同的双光栅表面的倒易空间的地图首次提出。此外，测量的镜面光束的角相关反射率与Harris等人[J. B.]哈里斯，T。W.普雷斯特河N. J. R.索普SAMBLES和R. A. WATTS，J. opt. Soc. Am.（接受）]，这是Chandezon等人的微分方法的二维模拟。（J. Chandezon，M. T.杜普伊湾CORNET和D. MAYSTRE，1982，J. opt. Soc. Am.，72，839）。
Abstract We present an experimental study of surface plasmon polaritons on gold bi-grating structures crossed experimentally at both ∼60° and ∼90°. The experimental observed mode positions arising from the two-dimensional reciprocal lattice provided by these surfaces are investigated in some detail, and from the information about the location of the surface plasmon resonance and critical edge positions, maps of the reciprocal space of two different bi-grating surfaces are presented for the first time. In addition the measured angular dependent reflectivities of the specular beam are compared with those generated by a new rigorous theoretical model developed by Harris et al. [J. B. HARRIS, T. W. PREIST, R. N. THORPE, J. R. SAMBLES and R. A. WATTS, J. opt. Soc. Am. (accepted)], which is a two-dimensional analogue of the differential method of Chandezon et al. (J. CHANDEZON, M. T. DUPUIS, G. CORNET and D. MAYSTRE, 1982, J. opt. Soc. Am., 72, 839).