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首页> 外文期刊>Physical review >Efficient Excitation Of Dielectric-loaded Surface Plasmon-polariton Waveguide Modesrnat Telecommunication Wavelengths
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Efficient Excitation Of Dielectric-loaded Surface Plasmon-polariton Waveguide Modesrnat Telecommunication Wavelengths

机译：电介质加载的表面等离激元波导模式对电信波长的有效激励

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摘要

The excitation of surface plasmon-polariton (SPP) waveguide modes in subwavelength dielectric ridges deposited on a thin gold film has been characterized and optimized at telecommunication wavelengths. The experimental data on the electromagnetic mode structure obtained using scanning near-field optical microscopy have been directly compared to full vectorial three-dimensional finite element method simulations. Two excitation geometries have been investigated where SPPs are excited outside or inside the dielectric tapered region adjoint-to the waveguide. The dependence of the efficiency of the SPP guided mode excitation on the taper opening angle has been measured and modeled. Single-mode guiding and strong lateral mode confinement of dielectric-loaded SPP waveguide modes have been characterized with the near-field measurements and compared to the effective-index method model.
机译：在电信波长下，表征并优化了在薄金膜上沉积的亚波长电介质脊中的表面等离振子（SPP）波导模式的激发。使用扫描近场光学显微镜获得的电磁模式结构的实验数据已直接与全矢量三维有限元方法模拟进行了比较。已经研究了两种激发几何结构，其中SPP在与波导相邻的电介质锥形区域的外部或内部被激发。已经测量并建模了SPP引导模式激发效率对锥度张角的依赖性。已经通过近场测量来表征介电负载SPP波导模式的单模导引和强横向模约束，并将其与有效折射率方法模型进行了比较。

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