Tunable modulation of photonic spin Hall effect by using a prism-coupling waveguide with hyperbolic metamaterials
Tunable modulation of photonic spin Hall effect by using a prism-coupling waveguide with hyperbolic metamaterials
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DOI：
10.1364/josab.408939
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发表时间：
2020-12
影响因子：
1.9
通讯作者：
Wenqin Zhang;M. Gao;B. Guo
中科院分区：
文献类型：
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作者：
Wenqin Zhang;M. Gao;B. Guo
从理论上研究了双曲超材料棱镜耦合光波导中激发的光子自旋霍尔效应的性质。提出的波导由四层组成，包括棱镜、HMM、薄金属和空气。I型和II型HMM都可以通过包括交替的等离子体和介电层的亚波长层的多层实现来创建，或者通过在主体介质矩阵中嵌入等离子体来创建，并且它们都被考虑在本研究中。结果表明，I型隐马尔可夫模型的水平PSHE漂移被显著抑制，而II型隐马尔可夫模型的水平PSHE漂移可以提高20倍以上。结果表明，两种隐马尔可夫模型波导中的PSHE垂直漂移行为相似，且受到明显的抑制。结果还表明，隐马尔可夫模型和金属层厚度对PSHE漂移有很大影响，尤其是对于II型隐马尔可夫模型波导中的水平PSHE漂移。此外，还计算和讨论了不同工作波长下的PSHE漂移。此外，还探索并提出了实现大的PSHE位移的最佳参数。
The properties of the photonic spin Hall effect (PSHE) excited in a prism-coupling waveguide with hyperbolic metamaterial (HMM) are investigated theoretically. The proposed waveguide is composed of four layers including a prism, HMM, thin metal, and air. Both type I and type II HMMs can be created through multilayer realization comprising alternating subwavelength layers of plasma and dielectric or by embedding plasma in a host dielectric matrix, and they are both considered in this study. Our results reveal that the horizontal PSHE shifts in the type I HMM waveguide are significantly suppressed, whereas the horizontal PSHE shifts in the type II HMM waveguide can be enhanced by more than 20 times. The results show that the behavior of vertical PSHE shifts in both types of HMM waveguides are similar and significantly suppressed. The results also show that the HMM and metal layer thicknesses extremely alter the PSHE shifts, especially for the horizontal PSHE shifts in the type II HMM waveguide. Furthermore, the PSHE shifts with different operating wavelengths are calculated and discussed. In addition, the optimal parameters for achieving huge PSHE shifts are explored and presented.