We study the dispersion and polarization properties as well as the coupling characteristics of suspended core microstructured optical fibers (SC-MOFs) having constant pitch and air-filling fraction with a varying suspension factor (SF) and diverse arrangements of gold-filled holes. The interaction between the core-guided fundamental mode and the surface plasmon polaritons (SPPs) generated on the surface of the gold-filled hole creates surface plasmon resonance (SPR) at the phase-matching wavelengths. It is observed that such plasmonic SC-MOF designs exhibit very high birefringence and an increased number of complete coupling points for high SF values. In addition, for all the arrangements of gold-filled holes, the coupling occurs for a higher order of the SPP for structures having greater SF. The resonance strength of such SC-MOFs is significantly enhanced and considerable reduction in full width at half maximum (FWHM) bandwidth of the SPR peak is achieved for the ${ x}$-axis with suitable arrangement of gold-filled holes. The values of the coupling strength and FWHM achieved for the proposed SC-MOF structures are better compared to all the data reported until now to the best of our knowledge. The results suggest that such SC-MOF structures may be beneficial for developing polarizers or in-fiber polarization splitters with improved performance.

中文翻译：

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悬浮的芯微结构光纤，其中有各种排列的填充金的孔：偏振特性和共振强度的研究

我们研究了具有恒定螺距和空气填充率，悬浮因子（SF）可变且填充金的孔的排列方式不同的悬浮纤芯微结构光纤（SC-MOF）的色散和偏振特性以及耦合特性。核心导向的基模与在金填充孔表面上产生的表面等离子体激元极化子（SPP）之间的相互作用在相位匹配波长处产生了表面等离子体激元共振（SPR）。可以观察到，对于高SF值，此类等离子SC-MOF设计具有很高的双折射性和增加的完整耦合点数。另外，对于充满金的孔的所有布置，对于具有更大SF的结构，对于更高阶的SPP发生耦合。$ {x} $轴，适当地布置了填充金的孔。据我们所知，与迄今报道的所有数据相比，拟议的SC-MOF结构获得的耦合强度和FWHM值更好。结果表明，这样的SC-MOF结构对于开发具有改善的性能的偏振器或光纤内偏振分束器可能是有益的。