本文利用数值模拟的方法研究了两种不同的非对称领结型纳米孔结构的光学特性。对于偏置间隙的领结型纳米孔，其基模共振与孔的周长呈线性关系。并且，不同的间隙尺寸对间隙偏置的敏感度不同。对于间隙的一边的结构发生变化的领结型纳米孔，基模共振可以通过改变单个几何参量（剩余部分的高度h2）进行线性调制。另外，研究中还观察到了类Fabry-Perot共振的共振峰分裂。我们在这项工作中提出的这两种打破领结型纳米孔的对称性的方法可以灵活地对领结型纳米孔结构的共振进行操控。

We investigated the optical properties of two different asymmetric bowtie nano-aperture (BNA) structures using numerical simulation. For the BNA with its gap displaced, the fundamental resonance is in linear relation with aperture perimeter. And different gap sizes show different sensitivity to gap displacement. For the BNA with one edge geometrically modified, the fundamental resonance can be tuned in linear fashion by changing one geometrical parameter (the height of the remaining part h2). Furthermore, peak splitting of Fabry-Perot-like resonance can also be observed in the study. Both approaches we propose in this work to break the symmetry of BNA can be used flexibly to manipulate the resonances of BNA structure.