Zhang Lingxuan, Zhang Wenfu, Wang Guoxi, Li Zhongyu, Du Shujian, Wang Weiqiang, Wang Leiran, Sun Qibing, Zhao Wei
Appl Opt. 2018 Feb 1;57(4):829-833. doi: 10.1364/AO.57.000829.
A 2D planar self-collimating photonic crystal, based on a dielectric square lattice and a hexagonal lattice, is proposed. We demonstrate that the proposed structure can support the propagation of a hybrid surface plasmon polarition (SPP) mode with a loss of -0.017 dB/μm, and the mode size is only 0.33 μm. The defined figure of merit is one order of magnitude higher than that of the dielectric-metal structure. In addition, the self-collimating angle of more than 10° can be tuned with a silica index change of 0.08. The proposed structure possesses broad operation bandwidth of 88 nm and 58 nm for a dielectric square lattice and a hexagonal lattice, respectively. These two kinds of photonic crystals promise potential applications in photonic modulators and SPP photonic devices.
提出了一种基于介电方晶格和六角晶格的二维平面自准直光子晶体。我们证明，所提出的结构可以支持混合表面等离激元极化激元（SPP）模式的传播，其损耗为-0.017 dB/μm，模式尺寸仅为0.33μm。定义的品质因数比介电-金属结构高一个数量级。此外，通过0.08的二氧化硅折射率变化可以调节超过10°的自准直角。对于介电方晶格和六角晶格，所提出的结构分别具有88nm和58nm的宽工作带宽。这两种光子晶体在光子调制器和SPP光子器件中具有潜在的应用前景。
