基于光子晶体光纤表面等离子体共振的紧凑型宽带偏振分束器设计

Design of Compact and Broadband Polarization Beam Splitters Based on Surface Plasmonic Resonance in Photonic Crystal Fibers.

作者信息

Mei Chao, Wu Yuan, Yuan Jinhui, Qiu Shi, Zhou Xian

机构信息

Research Center for Convergence Networks and Ubiquitous Services, University of Science and Technology Beijing (USTB), Beijing 100083, China.

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100086, China.

出版信息

Micromachines (Basel). 2022 Oct 3;13(10):1663. doi: 10.3390/mi13101663.

DOI:10.3390/mi13101663

PMID:36296016

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9611785/

Abstract

In this work, a polarization beam splitter (PBS) based on surface plasmonic resonance is proposed and realized in a designed photonic crystal fiber (PCF). The PCF consists of two kinds of air holes with different diameters. Two solid silica cores near the center of the PCF are established by removing the cladding air holes. A gold film is plated at the external surface of the central air hole of the PCF to excite the surface plasmonic resonance. In order to minimize the length and improve the operation bandwidth of the PBS, the influences of the transversal structural parameters of the PCF are investigated in the context of both and polarization beams. It was found that a 123.6-μm-long PBS with an operation bandwidth of 314 nm could be realized after the global optimization of five structural parameters. The proposed PBS may have potential applications in micro-/nano-optical systems for sensing and communications.

摘要

在这项工作中，提出了一种基于表面等离子体共振的偏振分束器（PBS），并在设计的光子晶体光纤（PCF）中实现。该光子晶体光纤由两种不同直径的气孔组成。通过去除包层气孔，在光子晶体光纤中心附近形成两个实心二氧化硅纤芯。在光子晶体光纤中心气孔的外表面镀上一层金膜，以激发表面等离子体共振。为了最小化长度并提高偏振分束器的工作带宽，在横磁（TM）和横电（TE）偏振光束的情况下，研究了光子晶体光纤横向结构参数的影响。结果发现，在对五个结构参数进行全局优化后，可以实现一个长度为123.6μm、工作带宽为314nm的偏振分束器。所提出的偏振分束器在用于传感和通信的微/纳光学系统中可能具有潜在应用。