Multiple trains of same-color surface plasmon-polaritons guided by the planar interface of a metal and a sculptured nematic thin film
Multiple trains of same-color surface plasmon-polaritons guided by the planar interface of a metal and a sculptured nematic thin film
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DOI：
10.1117/1.3033757
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发表时间：
2008-01-01
影响因子：
1.5
通讯作者：
Lakhtakia, Akhlesh
中科院分区：
文献类型：
--
作者：
Motyka, Michael A.;Lakhtakia, Akhlesh
雕刻向列薄膜 (SNTF) 是平行纳米线的组合，其形状位于与沉积薄膜的基板正交的固定平面中。对于 Kretschmann 配置中的平面金属/SNTF 界面，计算了线性偏振、倾斜入射平面波的吸光度、反射率和透射率，平面波的波矢量完全位于 SNTF 的形态重要平面中。所选择的 SNTF 的介电常数分布应该是在物理气相沉积过程中通过围绕平均值正弦变化蒸气入射角而雕刻出来的。计算表明，(i) 相同颜色的多个表面等离子体激元 (SPP) 序列可以由金属/SNTF 界面独立引导，(ii) 并非所有 SPP 序列都必须共同传播，(iii) 并非所有 SPP 序列都必须具有相同的线性偏振状态。随着不同的 SPP 列车在接口的引导下以不同的速度移动，无差错传感和基于等离子体的通信出现了令人兴奋的前景。
A sculptured nematic thin film (SNTF) is an assembly of parallel nanowires that are shaped in a fixed plane orthogonal to the substrate on which the film is deposited. The absorbance, reflectance, and transmittance of a linearly polarized, obliquely incident plane wave were calculated for a planar metal/SNTF interface in the Kretschmann configuration, the wave vector of the plane wave lying wholly in the morphologically significant plane of the SNTF. The permittivity profile of the chosen SNTF was supposed to have been sculptured during physical vapor deposition by varying the vapor incidence angle sinusoidally about a mean value. Calculations revealed that (i) multiple surface-plasmon-polariton (SPP) trains of the same color can be independently guided by the metal/SNTF interface, (ii) not all SPP trains have to be co-propagating, and (iii) not all SPP trains have to be of the same linear polarization state. As different SPP trains move with different speeds, guided by the interface, exciting prospects emerge for error-free sensing and plasmonics-based communication.