混合表面等离子体光子晶体波导

发布时间：2018-01-05 02:29

本文关键词：混合表面等离子体光子晶体波导　出处：《量子电子学报》2017年04期 　论文类型：期刊论文

【摘要】：提出了一种新型金属-绝缘体-半导体(MIS)混合表面等离子体结构,基于时域有限差分法验证了该结构在归一化频率范围(0.243~0.271)α/λ内具有明显的TM模式带隙。在二维光子晶体层移除或改变中间行空气孔半径构成线缺陷,形成混合波导结构1和2。分析表明入射光频率位于带隙内的光子能量被很好地局域在低折射率层中,且只能沿线缺陷传输。当入射波长为1550 nm时,两种波导的传输距离分别为18.41μm、15.70μm,群速度极值分别为0.186c、0.166c,品质因数达到384.74、1042.50。此波导能通过光子晶体层的线缺陷控制低折射率层表面等离子体(SPP)激光的传输路径,为波导器件的研究提供了有效的理论依据。
[Abstract]:A new type of metal-insulator-semiconductor (MISS-MIS) mixed surface plasma structure is proposed. Based on the finite-difference time-domain method, the structure is verified in the normalized frequency range of 0.243 ~ 0.271). There is obvious TM mode band gap in 伪 / 位. The line defect is formed by removing or changing the space pore radius in the two-dimensional photonic crystal layer. The analysis shows that the photon energy of the incident light frequency in the band gap is well localized in the low refractive index layer and can only be propagated along the defects along the line, when the incident wavelength is 1550 nm. The propagation distance of the two waveguides is 18.41 渭 m and 15.70 渭 m, respectively. The group velocity extremum is 0.186 cX 0.166 c, and the quality factor is 384.74. 1042.50. This waveguide can control the propagation path of SPP laser in low refractive index layer through the line defect of photonic crystal layer, which provides an effective theoretical basis for the study of waveguide devices.
【作者单位】：燕山大学里仁学院;燕山大学电气工程学院;
【基金】：国家自然科学基金,61172044~~
【分类号】：TN252
【正文快照】： l引目光子晶体是指在空间上形成的一种不同折射率呈周期性排列的人工结构,折射率的周期性变化使得光子晶体的能带结构中具有光子禁带。在完整的二维光子晶体中引入线缺陷,形成光子晶体波导,利用光子晶体的禁带特性可以将光局域在波导内传播.二维光子晶体波导利用不同方向的

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