Extraordinary Optical Transmission Exhibited by Surface Plasmon Polaritons in a Double-Layer Wire Grid Polarizer
Extraordinary Optical Transmission Exhibited by Surface Plasmon Polaritons in a Double-Layer Wire Grid Polarizer
复制标题
DOI：
10.1007/s11468-015-9980-8
复制
发表时间：
2015-05
期刊：
影响因子：
3
通讯作者：
A. Motogaito;Y. Morishita;H. Miyake;K. Hiramatsu
中科院分区：
文献类型：
--
作者：
A. Motogaito;Y. Morishita;H. Miyake;K. Hiramatsu
我们制作了一个双层线栅偏振器（WGP），并进行光学表征，以澄清结构和偏振特性之间的关系。对于垂直入射，制作的双层WGP表现出30.4 dB的消光比为400 nm的周期。横向磁透射率峰值角随WGP周期的变化而变化。根据表面等离子体激元（SPP）的色散曲线，可以根据金属狭缝结构的SPP所表现出的异常光学透射现象来解释峰值漂移。从严格耦合波分析的模拟，它被认为是入射光穿过抗蚀剂层，然后由抗蚀剂和Au之间的界面处的表面等离子体的激发。随后，SPP联合收割机与玻璃基板中的透射光结合，导致具有横向磁偏振的强透射光。因此，我们通过实验和模拟证明了SPPs所表现出的非凡的光学透射现象。
We fabricate a double-layer wire grid polarizer (WGP) and perform optical characterization to clarify the relationship between the structural and polarization characteristics. For normal incidence, the fabricated double-layer WGP exhibits an extinction ratio of 30.4 dB for a period of 400 nm. The transverse magnetic transmittance peak angle is found to vary with the period of the WGP. The peak shift can be explained on the basis of the extraordinary optical transmittance phenomena exhibited by the surface plasmon polaritons (SPPs) of metal slit structures according to the dispersion curve of the SPP. From the simulation of rigorous coupled-wave analysis, it is considered that the incident light passes through the resist layer, followed by the excitation of SPPs at the interface between the resist and Au. Subsequently, the SPPs combine with the transmitted light in the glass substrate, leading to strong transmitted light with transverse magnetic polarization. Therefore, we demonstrate the extraordinary optical transmittance phenomena exhibited by the SPPs by both experiment and simulation.